Music Ontology Specification

Specification Document

Latest version:: http://purl.org/ontology/mo/ (RDF/XML, Turtle)
Last update:: 2012/08/12
Revision:: Revision: 2.1
Editor:: Yves Raimond - BBC; Frédérick Giasson - Structured Dynamics
Authors:: Yves Raimond - BBC; Frédérick Giasson - Structured Dynamics; Kurt Jacobson - Centre for Digital Music, Queen Mary, University of London; George Fazekas - Centre for Digital Music, Queen Mary, University of London; Thomas Gängler - Faculty of Computer Science, University of Technology Dresden, Germany; Simon Reinhardt; Alexandre Passant - Seevl

	Music Ontology Github project
	Source code, Tools
	Music Ontology Specification Group
	Browse Archives
	Music Ontology Wiki
	Examples, datasets, working drafts

This work is licensed under a Creative Commons License. This copyright applies to the Music Ontology Specification and accompanying documentation and does not apply to Music Ontology data formats, ontology terms, or technology. Regarding underlying technology, Music Ontology relies heavily on W3C's RDF technology, an open Web standard that can be freely used by anyone.

This visual layout and structure of the specification was adapted from the FOAF Vocabulary Specification by Dan Brickley and Libby Miller and the SIOC Ontology Specification by Uldis Bojars and John G. Breslin. This document was automatically generated using the OntoSpec script.

Abstract

The Music Ontology Specification provides main concepts and properties fo describing music (i.e. artists, albums, tracks, but also performances, arrangements, etc.) on the Semantic Web. This document contains a detailed description of the Music Ontology.

Status of This Document

NOTE: This section describes the status of this document at the time of its publication. Other documents may supersede this document.

This specification is an evolving document. This document is generated by a machine-readable Music Ontology expressed in RDF/XML with a specification template.

Authors welcome suggestions on the Music Ontology and this document. This document may be updated or added to based on implementation experience, but no commitment is made by the authors regarding future updates.

Introduction
- Terminology and Notation
Music Ontology At A Glance
Music Ontology Overview
Background
The Music Ontology Description
Music Ontology cross-reference: Classes, Properties and Individuals
Other ontologies use by the music Ontology cross-reference: Classes, Properties and Individuals
Ontology namespaces referenced
References
Change Log

Introduction

Internet changed the music industry. At first, sharing systems like Napster allowed people to share any song they had on their computer with millions other people. That new reality changed the music industry’s landscape for good, and many juridical battles followed. However, a biggest change followed a couple of years later. Communities like MySpace started to appear. Strong of millions of regular users, such communities helped garage bands and obscure musicians to create their musical niche: the longtail of the music industry. This second change is more profound than the first one: now any musician has the possibility to reach their audience by sharing their work on the Web. In the mean time, a free database called MusicBrainz archiving million of between artists, albums and tracks appeared; music suggesting services like Pandora or Last.FM started to appear and Apple started to sell individual tracks at 1$ with iTunes.

At that point, the music industry of the eighties leaded by blockbusters was completely changed.

The Music Ontology is an attempt to provide a vocabulary for linking a wide range music-related information, and to provide a democratic mechanism for doing so. Anybody can publish Music Ontology data and link it with existing data, in order to help create a music-related web of data. For example, John Doe may publish some information about a performance he saw last night (like the fact that he was there, and a review). Mary Doe may publish the fact that she attended the same performance, that she recorded it using her cell-phone, and that the corresponding item is available in her podcast. The Music Ontology provides a vocabulary to express information ranging from this example to:

In this performance was interpreted a particular arrangement of the Trout Quintet by Franz Schubert.

This work was performed ten times, but only two of these performances were recorded.

Ten takes of this particular track have been recorded, each of which with a particular microphone location.

"Come as You Are" by Nirvana was released on a single and the "Nevermind" album.

During this gig, the band played ten songs. During the last one (a cover of "Eight days a week"), 
the drummer from the support band joined them to play with them.

The Music Ontology is divided in three levels of expressiveness - from the simplest one to the more complex one. Everything is clustered around the following categories:

Level 1: aims at providing a vocabulary for simple editorial information (tracks/artists/releases, etc.)
Level 2: aims at providing a vocabulary for expressing the music creation workflow (composition, arrangement, performance, recording, etc.)
Level 3: aims at providing a vocabulary for complex event decomposition, to express, for example, what happened during a particular performance, what is the melody line of a particular work, etc.

Terminology and Notation

The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC 2119].

Namespace URIs of the general form "http://www.example.com/." represents some application-dependent or context-dependent URI as defined in RFC 2396 [RFC 2396].

The XML Namespace URI that MUST be used by implementations of this specification is:

http://purl.org/ontology/mo/

Music Ontology At A Glance

An alphabetical index of Music Ontology terms, by class (categories or types), by property and by individuals. All the terms are hyperlinked to their detailed description for quick reference.

Music Ontology Overview

The Music Ontology definitions presented here are written using a computer language (RDF/OWL) that makes it easy for software to process some basic facts about the terms in the Music Ontology, and consequently about the things described in Music Ontology documents. A Music Ontology document, unlike a traditional Web page, can be combined with other Music Ontology documents to create a unified database of information

Music Ontology Classes Hierarchy

There are the schemes of the hierarchy of the Music Ontology classes. These schemes show the interaction between the Music Ontology classes and other ontologies classes.

Schemes are available on the Music Ontology Wiki

RDF Document Examples

The list of RDF serializations (XML and N3) Examples can be found on the Music Ontology Wiki

Examples of SPARQL queries against these RDF graphs

The list of SPARQL queries and their description can be found on the Music Ontology Wiki

Background

The Music Ontology is an online community effort to express music-related information on the Semantic Web.

The Music Ontology is mainly influenced by:

More detailed are available on the Wiki publication page.

The Music Ontology Description

This specification serves as the Music Ontology "namespace document". As such it describes the Music Ontology and the terms (RDF classes and properties) that constitute it, so that Semantic Web applications can use those terms in a variety of RDF-compatible document formats and applications.

This document presents the Music Ontology as a Semantic Web vocabulary or Ontology. The Music Ontology is straightforward, pragmatic and designed to allow simultaneous deployment and extension, and is therefore intended for widescale use.

Evolution and Extension of the Music Ontology

The Music Ontology is identified by the namespace URI 'http://purl.org/ontology/mo/'.

Revisions and extensions of Music Ontology are conducted through edits to the namespace document, which by convention is published in the Web at the namespace URI.

The properties and types defined here provide some basic concepts for use in Music Ontology descriptions. Other vocabularies (e.g. the Dublin Core metadata elements for simple bibliographic description, FOAF, etc.) can also be mixed in with the Music Ontology terms, as can local extensions. The Music Ontology is designed to be extended, and modules may be added at a later date.

Music Ontology Modules

Music Ontology modules may be used to extend the ontology and avoid making the base ontology too complex. A list of available modules is available on the Wiki.

Time, TimeLine and Event

The parts of the Music Ontology related to the production process of a particular piece of music (composition, performance, arrangement,...) as well as the parts dealing with time-related information are based on three external ontologies. The Music Ontology provides RDFS wrappers for the main classes, properties and individuals of these three ontologies.

The first ontology is: OWL-Time. Three terms of this ontology are used by the Music Ontology: TemporalThing, Instant and Interval.

However the kind of temporal information we may want to express goes a bit beyond OWL-Time, so we use an extension of it, developped in the Centre for Digital Music, Queen Mary, University of London: the TimeLine ontology. Indeed, we may want to express instants and intervals on multiple "timelines" (a timeline being a coherent backbone for temporal things): the one backing a particular audio file, the one behind an audio/video stream, or the physical one, backing a musical performance. Two classes of timelines are defined: PhysicalTimeLine (an instance of it being universaltimeline, which is the one on which we may address "the 13th of october, 2006"), and RelativeTimeLine (instances of this class may back audio signals, and we may address things such as "between 2 and 3 seconds" on them).

There is only one way of addressing temporal things per class of timeline. On a physical time line, a point is identified by a xsd:dateTime -- through the beginsAtDateTime property, and a duration by a xsd:duration -- through the durationXSD property. On a relative time line, a point P is identified by the duration of the interval [0,P], and this duration is identified by a xsd:duration -- through the beginsAtDuration property. A duration is identified by durationXSD.

In order to express knowledge about the production process of a piece of music, we use the Event ontology, also developped at the Centre for Digital Music. Events are seen as a way to arbitrary classify a space/time region. We have the possibiliy to attach to these events: agents (active participants to the event, like a performer, a sound engineer, ...), factors (passive things having a role in the event, like a musical instrument, a musical score, ...) and products (things produced by the event, such as a sound, a musical work, ...). A key feature of this ontology is also to allow "splitting" of events, through the sub_event transitive property. Using events, we may express: this musician was playing this instrument at this given time.

In the current version of the Music Ontology, the main sub-classes of Event are: Performance, Recording, Arrangement, Composition. However, given its abstract definition, we can describe lots of other things using this class: results of feature extraction, beat tracking, segmentation of songs...

Music Creation Workflow

In order to describe music-related events, we consider describing the workflow beginning with the creation of a musical work to its release on a particular record. This is our main description
paradigm, and was first used in the music production ontology developed at C4DM.

In the "easy" case (non-electronic music), We can describe this workflow within two boundaries: the simplest one and the most expressive one.

The simplest one consider the existence of 4 concepts within this workflow: MusicalWork (the musical work itself), Performance (the event corresponding to an actual performance
of the work), Signal (recording the performance as a signal), and MusicalManifestation (the release of this signal on a particular record).

The most expressive one consider the existence of 7 concepts: Composition (the event leading to the creation of a musical work), MusicalWork, Performance, Sound (the physical sound
produced by the performance), Recording (the event representing the transduction from a physical sound to a signal, through the use of a microphone), Signal, and MusicalManifestation.

Thus, we could imagine other ontologies plugged on top of MO, in order to represent the cognition of a sound (related to Sound), the different types of microphones that can be used (related to Recording), and so on.

In order to switch from the simplest workflow to the most expressive one, we define a single shortcut property: recorded_as, directly linking a Performance to a Signal. This property MUST be present in every case, in order to be able to do a simple query for accessing simple information.

A Music Production Workflow in the Music Ontology

The Music Ontology and Standards

It is important to understand that the Music Ontology as specified in this document is not a standard in the sense of ISO Standardisation, or that associated with W3C Process.

The Music Ontology depends heavily on W3C's standards work, specifically on XML, XML Namespaces, RDF, and OWL. All the Music Ontology documents must be well-formed RDF/XML documents.

This specification contributes an ontology, the "Music Ontology ", to the Semantic Web, specifying it using W3C's Resource Description Framework (RDF). As such, the Music Ontology adopts by reference both a syntax (using XML), a data model (RDF graphs) and a mathematically grounded definition for the rules that underpin the RDF design.

The Music Ontology and RDF

Why does the Music Ontology use RDF?

The Music Ontology is an application of the Resource Description Framework (RDF) because the subject area we're describing – music: artists, albums and tracks -- has so many competing requirements that a standalone format would not capture them or would lead to trying to describe these requirements in a number of incompatible formats. By using RDF, the Music Ontology gains a powerful extensibility mechanism, allowing Music-Ontology-based descriptions to be mixed with claims made in any other RDF vocabulary.

This is for that reason that the RDF document examples at the beginning of this document suggested to use the FOAF ontology to describe the Person, and its relations with other Person (artist or non-artist), and to use the Music Ontology to specify that that Person is also an Artist. That way, we can re-use other ontologies such as the Relationship ontology, in conjunction with the FOAF ontology, to describe different relationship between Artists.

The Music Ontology as an ontology cannot incorporate everything we might want to talk about that is related to music: artists (people), albums and tracks. Instead of covering all topics within the Music Ontology itself, we describe the basic topics and build into a larger framework - RDF - that allows us to take advantage of work elsewhere on more specific description vocabularies.

RDF provides the Music Ontology with a way to mix together different descriptive vocabularies in a consistent way. Vocabularies can be created by different communities and groups as appropriate and mixed together as required, without needing any centralized agreement on how terms from different vocabularies can be written down in XML or N3.

Check the Ontology namespaces referenced section to find some ontologies that ca be use in conjonction with the Music Ontology.

This mixing happens in two ways: firstly, RDF provides an underlying model of (typed) objects and their attributes or relationships. mo:Album is an example of a type of object (a "class"), while mo:compilation_of and mo:has_track are examples of a relationship and an attribute of an mo:Album; in RDF we call these "properties". Any vocabulary described in RDF shares this basic model, which is discernable in the syntax for RDF, and which removes one level of confusion in understanding a given vocabulary, making it simpler to comprehend and therefore reuse a vocabulary that you have not written yourself. This is the minimal self-documentation that RDF gives you.

Secondly, there are mechanisms for saying which RDF properties are connected to which classes, and how different classes are related to each other, using RDF Syntax and OWL. These can be quite general (all RDF properties by default come from an rdf:Resource for example) or very specific and precise (for example by using OWL constructs). This is another form of self-documentation, which allows you to connect different vocabularies together as you please.

In summary then, RDF is self-documenting in ways which enable the creation and combination of vocabularies in a devolved manner. This is particularly important for an ontology which describes communities, since online communities connect to many other domains of interest, which it would be impossible (as well as suboptimal) for a single group to describe adequately in non-geological time.

RDF is usually written using the XML or N3 syntaxes. If you want to process the data, you will need to use one of the many RDF toolkits available, such as Jena (Java) or Redland (C).

More information about RDF can be found in the RDF Primer.

The Music Ontology cross-reference: Classes, Properties and Individuals

The Music Ontology introduces the following classes, properties and individuals. See the Music Ontology namespace document in RDF/XML for more detail.

Classes, Properties and Individuals (full detail)

Class: mo:Activity - testing - level 1

Activity - An activity period, defining when an artist was musically active.

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in-range-of:	activity
sub-class-of:	event:Event

Class: mo:AnalogSignal - stable - level 2

AnalogSignal - An analog signal.

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in-range-of:	sampled_version_of
in-domain-of:	sampled_version
sub-class-of:	Signal

Class: mo:Arrangement - stable - level 2

Arrangement - An arrangement event.
Takes as agent the arranger, and produces a score (informational object, not the actually published score).

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in-range-of:	arranged_in
in-domain-of:	genre	produced_score	arrangement_of
sub-class-of:	event:Event

Class: mo:AudioFile - unstable - level 1

AudioFile - An audio file, which may be available on a local file system or through http, ftp, etc.

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in-domain-of:	encoding
sub-class-of:	foaf:Document	Medium

Class: mo:CD - unstable - level 1

CD - Compact Disc used as medium to record a musical manifestation.

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sub-class-of:	Medium

Class: mo:Composition - stable - level 2

Composition - A composition event.
Takes as agent the composer himself.
It produces a MusicalWork, or a MusicalExpression (when the initial "product" is a score, for example), or both...

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in-range-of:	composed_in
in-domain-of:	genre	produced_work	composer
sub-class-of:	event:Event

Class: mo:CorporateBody - stable - level 1

CorporateBody - Organization or group of individuals and/or other organizations involved in the music market.

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in-domain-of:	preview_download	paid_download	mailorder	imdb	free_download	download	discogs
sub-class-of:	foaf:Organization

Class: mo:DAT - unstable - level 1

DAT - Digital Audio Tape used as medium to record a musical manifestation.

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sub-class-of:	Medium

Class: mo:DCC - unstable - level 1

DCC - Digital Compact Cassette used as medium to record a musical manifestation.

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sub-class-of:	Medium

Class: mo:DVDA - unstable - level 1

DVDA - DVD-Audio used as medium to record a musical manifestation.

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sub-class-of:	Medium

Class: mo:DigitalSignal - stable - level 2

DigitalSignal - A digital signal

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in-range-of:	sampled_version
in-domain-of:	sampled_version_of	sample_rate	bitsPerSample
sub-class-of:	Signal

Class: mo:ED2K - unstable - level 1

ED2K - Something available on the E-Donkey peer-2-peer filesharing network

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sub-class-of:	Medium

Class: mo:Festival - stable - level 2

Festival - A festival - musical/artistic event lasting several days, like Glastonbury, Rock Am Ring...
We migth decompose this event (which is in fact just a classification of the space/time region related to
a particular festival) using hasSubEvent in several performances at different space/time.

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sub-class-of:	event:Event

Class: mo:Genre - stable - level 2

Genre - An expressive style of music.

Any taxonomy can be plug-in here. You can either define a genre by yourself, like this:

:mygenre a mo:Genre; dc:title "electro rock".

Or you can refer to a DBPedia genre (such as http://dbpedia.org/resource/Baroque_music), allowing semantic web
clients to access easily really detailed structured information about the genre you are refering to.

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in-range-of:	similar_to	genre
in-domain-of:	wikipedia	similar_to

Class: mo:Instrument - stable - level 2

Instrument - Any of various devices or contrivances that can be used to produce musical tones or sound.

Any taxonomy can be used to subsume this concept. The default one is one extracted by Ivan Herman
from the Musicbrainz instrument taxonomy, conforming to SKOS. This concept holds a seeAlso link
towards this taxonomy.

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in-range-of:	primary_instrument	instrument
in-domain-of:	wikipedia

Class: mo:Instrumentation - stable - level 2

Instrumentation - Instrumentation deals with the techniques of writing music for a specific instrument,
including the limitations of the instrument, playing techniques and idiomatic handling of the instrument.

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sub-class-of:	Arrangement

Class: mo:Label - stable - level 1

Label - Trade name of a company that produces musical works or expression of musical works.

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in-range-of:	label
in-domain-of:	musicbrainz_guid	lc
sub-class-of:	CorporateBody

Class: mo:Libretto - stable - level 2

Libretto - Libretto

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sub-class-of:	MusicalExpression

Class: mo:Lyrics - stable - level 2

Lyrics - Lyrics

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in-range-of:	lyrics
in-domain-of:	text
sub-class-of:	MusicalExpression

Class: mo:MD - unstable - level 1

MD - Mini Disc used as medium to record a musical manifestation.

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sub-class-of:	Medium

Class: mo:MagneticTape - unstable - level 1

MagneticTape - Magnetic analogue tape used as medium to record a musical manifestation.

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sub-class-of:	Medium

Class: mo:Medium - unstable - level 1

Medium - A means or instrumentality for storing or communicating musical manifestation.

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sub-class-of:	MusicalItem

Class: mo:Membership - testing - level 1

Membership - A membership event, where one or several people belongs to a group during a particular time period.

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in-range-of:	membership
in-domain-of:	primary_instrument	group	artist
sub-class-of:	event:Event

Class: mo:Movement - unstable - level 2

Movement - A movement is a self-contained part of a musical work. While individual or selected movements from a composition are sometimes performed separately, a performance of the complete work requires all the movements to be performed in succession.

Often a composer attempts to interrelate the movements thematically, or sometimes in more subtle ways, in order that the individual
movements exert a cumulative effect. In some forms, composers sometimes link the movements, or ask for them to be played without a
pause between them.

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in-range-of:	movement
in-domain-of:	movement_number
sub-class-of:	MusicalWork

Class: mo:MusicArtist - stable - level 1

MusicArtist - A person or a group of people (or a computer :-) ), whose musical
creative work shows sensitivity and imagination

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in-range-of:	tribute_to	supporting_musician	interpreter	djmixed_by	compiler
in-domain-of:	paid_download	musicmoz	musicbrainz_guid	mailorder	label	imdb	image	homepage	discogs	supporting_musician	sampled	remixed	origin	ipi	fanpage	djmixed	discography	compiled	biography	activity_start	activity_end	activity
sub-class-of:	foaf:Agent

Class: mo:MusicGroup - stable - level 1

MusicGroup - Group of musicians, or musical ensemble, usually popular or folk, playing parts of or improvising off of a musical arrangement.

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in-domain-of:	member
sub-class-of:	foaf:Group	MusicArtist

Class: mo:MusicalExpression - unstable - level 1

MusicalExpression - The intellectual or artistic realization of a work in the form of alpha-numeric, musical, or choreographic notation, sound, etc., or any combination of such forms.

For example:

Work #1 Franz Schubert's Trout quintet

* Expression #1 the composer's score
* Expression #2 sound issued from the performance by the Amadeus Quartet and Hephzibah Menuhin on piano
* Expression #3 sound issued from the performance by the Cleveland Quartet and Yo-Yo Ma on the cello
* . . . .

The Music Ontology defines the following sub-concepts of a MusicalExpression, which should be used instead of MusicalExpression itself: Score (the
result of an arrangement), Sound (produced during a performance), Signal. However, it is possible to stick to FRBR and bypass the worflow
mechanism this ontology defines by using the core FRBR properties on such objects. But it is often better to use events to interconnect such
expressions (allowing to go deeply into the production process - `this performer was playing this particular instrument at that
particular time').

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in-range-of:	similar_to	publication_of
in-domain-of:	similar_to	musicmoz	imdb	image	homepage	genre	discogs	published_as
sub-class-of:	frbr:Expression

Class: mo:MusicalItem - unstable - level 1

MusicalItem - A single exemplar of a musical expression.

For example, it could be a single exemplar of a CD. This is normally an single object (a CD) possessed by somebody.

From the FRBR final report: The entity defined as item is a concrete entity. It is in many instances a single physical object (e.g., a copy of a one-volume monograph, a single audio cassette, etc.). There are instances, however, where the entity defined as item comprises more than one physical object (e.g., a monograph issued as two separately bound volumes, a recording issued on three separate compact discs, etc.).

In terms of intellectual content and physical form, an item exemplifying a manifestation is normally the same as the manifestation itself. However, variations may occur from one item to another, even when the items exemplify the same manifestation, where those variations are the result of actions external to the intent of the producer of the manifestation (e.g., damage occurring after the item was produced, binding performed by a library, etc.).

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in-range-of:	similar_to	preview	item	available_as
in-domain-of:	similar_to	image	homepage	genre	encodes

Class: mo:MusicalManifestation - stable - level 1

MusicalManifestation -
This entity is related to the edition/production/publication of a musical expression (musical manifestation are closely related with the music industry (their terms, concepts, definitions, methods (production, publication, etc.), etc.)

From the FRBR final report: The entity defined as manifestation encompasses a wide range of materials, including manuscripts, books, periodicals, maps, posters, sound recordings, films, video recordings, CD-ROMs, multimedia kits, etc. As an entity, manifestation represents all the physical objects that bear the same characteristics, in respect to both intellectual content and physical form.

Work #1 J. S. Bach's Six suites for unaccompanied cello

* Expression #1 sound issued during the performance by Janos Starker recorded in 1963 and 1965
o Manifestation #1 recordings released on 33 1/3 rpm sound discs in 1965 by Mercury
o Manifestation #2 recordings re-released on compact disc in 1991 by Mercury
* Expression #2 sound issued during the performances by Yo-Yo Ma recorded in 1983
o Manifestation #1 recordings released on 33 1/3 rpm sound discs in 1983 by CBS Records
o Manifestation #2 recordings re-released on compact disc in 1992 by CBS Records

Changes that occur deliberately or even inadvertently in the production process that affect the copies result, strictly speaking, in a new manifestation. A manifestation resulting from such a change may be identified as a particular "state" or "issue" of the publication.

Changes that occur to an individual copy after the production process is complete (e.g., the loss of a page, rebinding, etc.) are not considered to result in a new manifestation. That copy is simply considered to be an exemplar (or item) of the manifestation that deviates from the copy as produced.

With the entity defined as manifestation we can describe the physical characteristics of a set of items and the characteristics associated with the production and distribution of that set of items that may be important factors in enabling users to choose a manifestation appropriate to their physical needs and constraints, and to identify and acquire a copy of that manifestation.

Defining manifestation as an entity also enables us to draw relationships between specific manifestations of a work. We can use the relationships between manifestations to identify, for example, the specific publication that was used to create a microreproduction.

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in-range-of:	similar_to	published_as	published	produced	other_release_of	compiled
in-domain-of:	similar_to	musicmoz	musicbrainz	imdb	image	homepage	genre	discogs	tribute_to	release_type	release_status	publishing_location	publisher	publication_of	producer	preview	other_release_of	media_type	item	compiler	compilation_of	available_as
sub-class-of:	frbr:Manifestation

Class: mo:MusicalWork - stable - level 2

MusicalWork - Distinct intellectual or artistic musical creation.

From the FRBR final report: A work is an abstract entity; there is no single material object one can point to as the work. We recognize the work through individual realizations or expressions of the work, but the work itself exists only in the commonality of
content between and among the various expressions of the work. When we speak of Homer's Iliad as a work, our point of reference is not a particular recitation or text of the work, but the intellectual creation that lies behind all the various expressions of the work.

For example:

work #1 J. S. Bach's The art of the fugue

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in-range-of:	similar_to	performance_of	produced_work	arrangement_of
in-domain-of:	tempo	similar_to	performed_in	musicmoz	musicbrainz	meter	key	imdb	image	homepage	genre	discogs	bpm	opus	movement	lyrics	iswc	composed_in	arranged_in
sub-class-of:	frbr:Work

Class: mo:Orchestration - stable - level 2

Orchestration - Orchestration includes, in addition to instrumentation, the handling of groups of instruments and their balance and interaction.

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sub-class-of:	Arrangement

Class: mo:Performance - stable - level 2

Performance - A performance event.
It might include as agents performers, engineers, conductors, or even listeners.
It might include as factors a score, a MusicalWork, musical instruments.
It might produce a sound:-)

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in-range-of:	engineered	records	performed_in	performed	listened	conducted
in-domain-of:	tempo	key	genre	engineer	bpm	singer	recorded_as	produced_sound	performer	performance_of	listener	instrument	conductor
sub-class-of:	event:Event

Class: mo:PublishedLibretto - stable - level 2

PublishedLibretto - A published libretto

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in-domain-of:	ismn
sub-class-of:	MusicalManifestation

Class: mo:PublishedLyrics - stable - level 2

PublishedLyrics - Published lyrics, as a book or as a text file, for example

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in-domain-of:	ismn
sub-class-of:	MusicalManifestation

Class: mo:PublishedScore - stable - level 2

PublishedScore - A published score (subclass of MusicalManifestation)

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in-domain-of:	ismn
sub-class-of:	MusicalManifestation

Class: mo:Record - stable - level 1

Record - A published record (manifestation which first aim is to render the product of a recording)

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in-range-of:	record
in-domain-of:	musicbrainz_guid	track_count	track	record_number
sub-class-of:	MusicalManifestation

Class: mo:Recording - stable - level 2

Recording - A recording event.
Takes a sound as a factor to produce a signal (analog or digital).
The location of such events (if any) is the actual location of the corresponding
microphone or the "recording device".

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in-range-of:	engineered	recorded_in
in-domain-of:	genre	engineer	recording_of	produced_signal
sub-class-of:	event:Event

Class: mo:RecordingSession - testing - level 2

RecordingSession - A set of performances/recordings/mastering events. This event can be decomposed in its constituent events using event:sub_event

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in-range-of:	engineered
in-domain-of:	genre	engineer	produced_signal_group
sub-class-of:	event:Event

Class: mo:Release - testing - level 1

Release - A specific release, with barcode, box, liner notes, cover art, and a number of records

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in-range-of:	release
in-domain-of:	label	upc	record_count	record	gtin	grid	ean	catalogue_number
sub-class-of:	MusicalManifestation

Class: mo:ReleaseEvent - testing - level 1

ReleaseEvent - A release event, in a particular place (e.g. a country) at a particular time. Other factors of this event might include cover art, liner notes, box, etc. or a release grouping all these.

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in-domain-of:	musicbrainz_guid	release
sub-class-of:	event:Event

Class: mo:ReleaseStatus - stable - level 1

ReleaseStatus - Musical manifestation release status.

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in-range-of:	release_status

Class: mo:ReleaseType - stable - level 1

ReleaseType - Release type of a particular manifestation, such as "album" or "interview"...

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in-range-of:	release_type

Class: mo:SACD - unstable - level 1

SACD - Super Audio Compact Disc used as medium to record a musical manifestation.

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sub-class-of:	Medium

Class: mo:Score - stable - level 2

Score - Here, we are dealing with the informational object (the MusicalExpression), not the actually "published" score.
This may be, for example, the product of an arrangement process.

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in-range-of:	performance_of	produced_score
in-domain-of:	performed_in	meter
sub-class-of:	MusicalExpression

Class: mo:Show - stable - level 2

Show - A show - a musical event lasting several days, in a particular venue. Examples can be
"The Magic Flute" at the Opera Bastille, August 2005, or a musical in the west end...

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sub-class-of:	event:Event

Class: mo:Signal - stable - level 1

Signal - A subclass of MusicalExpression, representing a signal, for example a master signal produced by a performance and a recording.

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in-range-of:	signal	sampled	remixed	recorded_as	produced_signal	encodes	djmixed	derived_from	compilation_of
in-domain-of:	tempo	musicbrainz_guid	musicbrainz	key	duration	bpm	trmid	time	records	puid	isrc	interpreter	djmixed_by	derived_from	channels
sub-class-of:	MusicalExpression

Class: mo:SignalGroup - testing - level 1

SignalGroup - A musical expression representing a group of signals, for example a set of masters resulting from a whole recording/mastering session.

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in-range-of:	produced_signal_group
in-domain-of:	musicbrainz_guid	signal
sub-class-of:	MusicalExpression

Class: mo:SoloMusicArtist - stable - level 1

SoloMusicArtist - Single person whose musical creative work shows sensitivity and imagination.

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sub-class-of:	foaf:Person	MusicArtist

Class: mo:Sound - stable - level 2

Sound - A subclass of MusicalExpression, representing a sound. Realisation of a MusicalWork during a musical Performance.

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in-range-of:	recording_of	produced_sound
in-domain-of:	recorded_in
sub-class-of:	MusicalExpression	event:Event

Class: mo:Stream - unstable - level 1

Stream - Transmission over a network used as medium to broadcast a musical manifestation

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sub-class-of:	Medium

Class: mo:Torrent - unstable - level 1

Torrent - Something available on the Bittorrent peer-2-peer filesharing network

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sub-class-of:	Medium

Class: mo:Track - stable - level 1

Track - A track on a particular record

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in-range-of:	track
in-domain-of:	musicbrainz_guid	duration	track_number	record_side	olga
sub-class-of:	MusicalManifestation

Class: mo:Transcription - testing - level 2

Transcription - Transcription event

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sub-class-of:	event:Event

Class: mo:Vinyl - unstable - level 1

Vinyl - Vinyl used as medium to record a musical manifestation

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sub-class-of:	Medium

Property: mo:activity - testing - level 1

activity - Relates an artist to an activity period

Domain:	MusicArtist
Range:	Activity

Property: mo:activity_end - testing - level 1

activity_end - Relates an artist to a date at which its activity ended

Domain:	MusicArtist
Range:	xsd:date

Property: mo:activity_start - testing - level 1

activity_start - Relates an artist to a date at which its activity started

Domain:	MusicArtist
Range:	xsd:date

Property: mo:amazon_asin - stable - level 1

amazon_asin - Used to link a work or the expression of a work to its corresponding Amazon ASINs page.

Domain:	frbr:Item	frbr:Manifestation	frbr:Expression	frbr:Work
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:arranged_in - unstable - level 2

arranged_in - Associates a work to an arrangement event where it was arranged

Domain:	MusicalWork
Range:	Arrangement
Inverse-of:	mo:arrangement_of
Sub-property-of:	event:isFactorOf

Property: mo:arrangement_of - unstable - level 2

arrangement_of - Associates an arrangement event to a work

Domain:	Arrangement
Range:	MusicalWork
Inverse-of:	mo:arranged_in
Sub-property-of:	event:factor

Property: mo:artist - testing - level 1

artist - Relates a membership event with the corresponding artist

Domain:	Membership
Range:	foaf:Agent

Property: mo:available_as - stable - level 1

available_as - Relates a musical manifestation to a musical item (this album, and my particular cd). By using
this property, there is no assumption on wether the full content is available on the linked item.
To be explicit about this, you can use a sub-property, such as mo:item (the full manifestation
is available on that item) or mo:preview (only a part of the manifestation is available on
that item).

This is a subproperty of frbr:examplar.

Domain:	MusicalManifestation
Range:	MusicalItem
Sub-property-of:	frbr:exemplar

Property: mo:biography - stable - level 1

biography - Used to link an artist to their online biography.

Domain:	MusicArtist
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:bitsPerSample - stable - level 1

bitsPerSample - Associates a digital signal to the number a bits used to encode one sample. Range is xsd:int.

Domain:	DigitalSignal
Range:	xsd:int

Property: mo:bpm - stable - level 2

bpm - Indicates the BPM of a MusicalWork or a particular Performance
Beats per minute: the pace of music measured by the number of beats occurring in 60 seconds.

Domain:	Signal	Performance	MusicalWork
Range:	xsd:float

Property: mo:catalogue_number - testing - level 1

catalogue_number - Links a release with the corresponding catalogue number

Domain:	Release
Range:	xsd:string
Sub-property-of:	uuid

Property: mo:channels - stable - level 1

channels - Associates a signal to the number of channels it holds (mono --> 1, stereo --> 2). Range is xsd:int.

Domain:	Signal
Range:	xsd:int

Property: mo:collaborated_with - unstable - level 1

collaborated_with - Used to relate two collaborating people on a work.

Domain:	foaf:Agent
Range:	foaf:Agent

Property: mo:compilation_of - unstable - level 1

compilation_of - Indicates that a musical manifestation is a compilation of several Signals.

Domain:	MusicalManifestation
Range:	Signal

Property: mo:compiled - unstable - level 1

compiled - Used to relate an person or a group of person who compiled the manifestation of a musical work.

Domain:	MusicArtist
Range:	MusicalManifestation
Inverse-of:	mo:compiler

Property: mo:compiler - unstable - level 1

compiler - Used to relate the manifestation of a musical work to a person or a group of person who compiled it.

Domain:	MusicalManifestation
Range:	MusicArtist
Inverse-of:	mo:compiled

Property: mo:composed_in - unstable - level 2

composed_in - Associates a MusicalWork to the Composition event pertaining
to its creation. For example, I might use this property to associate
the Magic Flute to its composition event, occuring during 1782 and having as
a mo:composer Mozart.

Domain:	MusicalWork
Range:	Composition
Inverse-of:	mo:produced_work
Sub-property-of:	event:producedIn

Property: mo:composer - stable - level 2

composer - Associates a composition event to the actual composer. For example,
this property could link the event corresponding to the composition of the
Magic Flute in 1782 to Mozart himself (who obviously has a FOAF profile:-) ).

Domain:	Composition
Range:	foaf:Agent
Sub-property-of:	event:agent

Property: mo:conducted - unstable - level 2

conducted - Relates agents to the performances they were conducting

Domain:	foaf:Agent
Range:	Performance
Inverse-of:	mo:conductor
Sub-property-of:	event:isAgentIn

Property: mo:conductor - stable - level 2

conductor - Relates a performance to the conductor involved

Domain:	Performance
Range:	foaf:Agent
Inverse-of:	mo:conducted
Sub-property-of:	event:agent

Property: mo:contains_sample_from - unstable - level 1

contains_sample_from - Relates a signal to another signal, which has been sampled.

Domain:
Range:
Sub-property-of:	derived_from

Property: mo:derived_from - testing - level 1

derived_from - A related signal from which the described signal is derived.

Domain:	Signal
Range:	Signal
Sub-property-of:	dcterms:source

Property: mo:discography - stable - level 1

discography - Used to links an artist to an online discography of their musical works. The discography should provide a summary of each released musical work of the artist.

Domain:	MusicArtist
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:discogs - stable - level 1

discogs - Used to link a musical work or the expression of a musical work, an artist or a corporate body to to its corresponding Discogs page.

Domain:	CorporateBody	MusicArtist	MusicalManifestation	MusicalExpression	MusicalWork
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:djmix_of - unstable - level 1

djmix_of - Indicates that all (or most of) the tracks of a musical work or the expression of a musical work were mixed together from all (or most of) the tracks from another musical work or the expression of a musical work to form a so called DJ-Mix.

The tracks might have been altered by pitching (so that the tempo of one track matches the tempo of the following track) and fading (so that one track blends in smoothly with the other). If the tracks have been more substantially altered, the "mo:remix" relationship type is more appropriate.

Domain:
Range:
Sub-property-of:	derived_from

Property: mo:djmixed - unstable - level 1

djmixed - Used to relate an artist who djmixed a musical work or the expression of a musical work.

The artist usually selected the tracks, chose their sequence, and slightly changed them by fading (so that one track blends in smoothly with the other) or pitching (so that the tempo of one track matches the tempo of the following track). This applies to a 'Mixtape' in which all tracks were DJ-mixed together into one single long track.

Domain:	MusicArtist
Range:	Signal
Inverse-of:	mo:djmixed_by

Property: mo:djmixed_by - unstable - level 1

djmixed_by - Used to relate a work or the expression of a work to an artist who djmixed it.

The artist usually selected the tracks, chose their sequence, and slightly changed them by fading (so that one track blends in smoothly with the other) or pitching (so that the tempo of one track matches the tempo of the following track). This applies to a 'Mixtape' in which all tracks were DJ-mixed together into one single long track.

Domain:	Signal
Range:	MusicArtist
Inverse-of:	mo:djmixed

Property: mo:download - stable - level 1

download - This property can be used to link from a person to the website where they make their works available, or from
a manifestation (a track or an album, for example) to a web page where it is available for
download.

It is better to use one of the three sub-properties instead of this one in order to specify wether the
content can be accessed for free (mo:freedownload), if it is just free preview material (mo:previewdownload), or
if it can be accessed for some money (mo:paiddownload) (this includes links to the Amazon store, for example).

This property MUST be used only if the content is just available through a web page (holding, for example
a Flash application) - it is better to link to actual content directly through the use of mo:available_as and
mo:Stream, mo:Torrent or mo:ED2K, etc. Therefore, Semantic Web user agents that don't know how to read HTML and even
less to rip streams from Flash applications can still access the audio content.

Domain:	CorporateBody	foaf:Agent	frbr:Manifestation
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:duration - testing - level 1

duration - The duration of a track or a signal in ms

Domain:	Signal	Track
Range:	xsd:float

Property: mo:ean - testing - level 1

ean - The European Article Number (EAN) is a universal identifier for products, commonly printed in form of barcodes on them. The numbers represented by those codes can either be 8 or 13 digits long, with the 13-digit-version being most common. EANs form a superset of the North American Universal Product Code (UPC) as every UPC can be made an EAN by adding a leading zero to it. Additionally every EAN is also a Japanese Article Number (JAN). The identifiers were formerly assigned by EAN International which merged with Uniform Code Council (UCC, the guys behind the UPCs) and Electronic Commerce Council of Canada (ECCC) to become GS1.

Domain:	Release
Range:	xsd:string
Sub-property-of:	gtin

Property: mo:encodes - unstable - level 1

encodes - Relates a MusicalItem (a track on a particular CD, an audio file, a stream somewhere) to the signal it encodes.

This is usually a lower-resolution version of the master signal (issued from a Recording event).

Domain:	MusicalItem
Range:	Signal

Property: mo:encoding - unstable - level 1

encoding - Method used to convert analog electronic signals into digital format such as "MP3 CBR @ 128kbps", "OGG @ 160kbps", "FLAC", etc.

Domain:	AudioFile
Range:	rdfs:Literal

Property: mo:engineer - stable - level 2

engineer - Relates a performance or a recording to the engineer involved

Domain:	RecordingSession	Recording	Performance
Range:	foaf:Agent
Inverse-of:	mo:engineered
Sub-property-of:	event:agent

Property: mo:engineered - unstable - level 2

engineered - Relates agents to the performances/recordings they were engineering in

Domain:	foaf:Agent
Range:	RecordingSession	Recording	Performance
Inverse-of:	mo:engineer
Sub-property-of:	event:isAgentIn

Property: mo:event_homepage - stable - level 2

event_homepage - Links a particular event to a web page

Domain:	event:Event
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:exchange_item - stable - level 1

exchange_item - A person, a group of person or an organization exchanging an exemplar of a single manifestation.

Domain:	foaf:Agent
Range:	frbr:Item

Property: mo:fanpage - stable - level 1

fanpage - Used to link an artist to a fan-created webpage devoted to that artist.

Domain:	MusicArtist
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:free_download - stable - level 1

free_download - This property can be used to link from a person to the website where they make their works available, or from
a manifestation (a track or an album, for example) to a web page where it is available for free
download.

This property MUST be used only if the content is just available through a web page (holding, for example
a Flash application) - it is better to link to actual content directly through the use of mo:available_as and
mo:Stream, mo:Torrent or mo:ED2K, etc. Therefore, Semantic Web user agents that don't know how to read HTML and even
less to rip streams from Flash applications can still access the audio content.

Domain:	CorporateBody	foaf:Agent	frbr:Manifestation
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf	download

Property: mo:genre - stable - level 2

genre - Associates an event (like a performance or a recording) to a particular musical genre.
Further version of this property may also include works and scores in the domain.

Domain:	MusicalItem	MusicalManifestation	MusicalExpression	MusicalWork	RecordingSession	Recording	Composition	Arrangement	Performance	foaf:Agent
Range:	Genre

Property: mo:grid - testing - level 1

grid - The Global Release Identifier (GRid) is a system for uniquely identifying Releases of music over electronic networks (that is, online stores where you can buy music as digital files). As that it can be seen as the equivalent of the BarCode (or more correctly the GTIN) as found on physical releases of music. Like the ISRC (a code for identifying single recordings as found on releases) it was developed by the IFPI but it does not appear to be a standard of the ISO.

Domain:	Release
Range:	xsd:string
Sub-property-of:	uuid

Property: mo:group - testing - level 1

group - Relates a membership event with the corresponding group

Domain:	Membership
Range:	foaf:Group

Property: mo:gtin - testing - level 1

gtin - GTIN is a grouping term for EANs and UPCs. In common speech those are called barcodes although the barcodes are just a representation of those identifying numbers.

Domain:	Release
Range:	xsd:string

Property: mo:headliner - testing - level 2

headliner - Relates a performance to the headliner(s) involved

Domain:
Range:
Sub-property-of:	performer

Property: mo:homepage - stable - level 1

homepage - Links an artist, a record, etc. to a corresponding web page

Domain:	MusicalItem	MusicalManifestation	MusicalExpression	MusicArtist	MusicalWork
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:image - stable - level 1

image - Indicates a pictorial image (JPEG, GIF, PNG, Etc.) of a musical work, the expression of a musical work, the manifestation of a work or the examplar of a manifestation.

Domain:	MusicalItem	MusicalManifestation	MusicalExpression	MusicArtist	MusicalWork
Range:	foaf:Image
Sub-property-of:	foaf:depiction

Property: mo:imdb - stable - level 1

imdb - Used to link an artist, a musical work or the expression of a musical work to their equivalent page on IMDb, the InternetMovieDatabase.

Domain:	CorporateBody	MusicArtist	MusicalManifestation	MusicalExpression	MusicalWork
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:instrument - stable - level 2

instrument - Relates a performance to a musical instrument involved

Domain:	Performance
Range:	Instrument
Sub-property-of:	event:factor

Property: mo:interpreter - testing - level 1

interpreter - Adds an involved music artist, who interpreted, remixed, or otherwise modified an existing signal, which resulted in the signal that is here the subject of this relation.

Domain:	Signal
Range:	MusicArtist

Property: mo:ipi - testing - level 1

ipi - The Interested Parties Information Code (IPI) is an ISO standard similar to ISBNs for identifying the people or groups with some involvement with a particular musical work / compositions.

Domain:	MusicArtist
Range:	xsd:string
Sub-property-of:	uuid

Property: mo:ismn - testing - level 1

ismn - The International Standard Music Number (ISMN) is an ISO standard similar to ISBNs for identifying printed music publications

Domain:	PublishedScore	PublishedLibretto	PublishedLyrics
Range:	xsd:string
Sub-property-of:	uuid

Property: mo:isrc - stable - level 1

isrc - The ISRC (International Standard Recording Code) is the international identification system for sound recordings and music videorecordings.
Each ISRC is a unique and permanent identifier for a specific recording which can be permanently encoded into a product as its digital fingerprint.
Encoded ISRC provide the means to automatically identify recordings for royalty payments.

Domain:	Signal
Range:	xsd:string
Sub-property-of:	uuid

Property: mo:iswc - testing - level 1

iswc - Links a musical work to the corresponding ISWC number

Domain:	MusicalWork
Range:	xsd:string
Sub-property-of:	uuid

Property: mo:item - testing - level 1

item - Relates a musical manifestation to a musical item (this album, and my particular cd) holding the
entire manifestation, and not just a part of it.

Domain:	MusicalManifestation
Range:	MusicalItem
Sub-property-of:	available_as

Property: mo:key - stable - level 2

key - Indicated the key used by the musicians during a performance, or the key of a MusicalWork.
Any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music.

Range:
Domain:	Signal	Performance	MusicalWork

Property: mo:label - testing - level 1

label - Associates a release event with the label releasing the record

Domain:	MusicArtist	Release
Range:	Label

Property: mo:lc - testing - level 1

lc - The Label Code (LC) was introduced in 1977 by the IFPI (International Federation of Phonogram and Videogram Industries) in order to unmistakably identify the different record labels (see Introduction, Record labels) for rights purposes. The Label Code consists historically of 4 figures, presently being extended to 5 figures, preceded by LC and a dash (e.g. LC-0193 = Electrola; LC-0233 = His Master's Voice). Note that the number of countries using the LC is limited, and that the code given on the item is not always accurate.

Domain:	Label
Range:	xsd:string
Sub-property-of:	uuid

Property: mo:licence - stable - level 1

licence - Used to link a work or the expression of a work to the license under which they can be manipulated (downloaded, modified, etc).

This is usually used to link to a Creative Commons licence.

Range:
Domain:	frbr:Manifestation	frbr:Expression	frbr:Work

Property: mo:listened - unstable - level 2

listened - Relates agents to the performances they were listening in

Domain:	foaf:Agent
Range:	Performance
Inverse-of:	mo:listener
Sub-property-of:	event:isAgentIn

Property: mo:listener - stable - level 2

listener - Relates a performance to the listener involved

Domain:	Performance
Range:	foaf:Agent
Inverse-of:	mo:listened
Sub-property-of:	event:agent

Property: mo:lyrics - testing - level 2

lyrics - Associates lyrics with a musical work

Domain:	MusicalWork
Range:	Lyrics

Property: mo:mailorder - stable - level 1

mailorder - Used to link a musical work or the expression of a musical work to a website where people can buy a copy of the musical manifestation.

Domain:	CorporateBody	MusicArtist	frbr:Manifestation
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:mashup_of - unstable - level 1

mashup_of - Indicates that musical works or the expressions of a musical work were mashed up on this album or track.

This means that two musical works or the expressions of a musical work by different artists are mixed together, over each other, or otherwise combined into a single musical work (usually by a third artist, the remixer).

Domain:
Range:
Sub-property-of:	derived_from

Property: mo:media_type - testing - level 1

media_type - The mediatype (file format or MIME type, or physical medium) of a musical manifestation, e.g. a MP3, CD or vinyl.

Domain:	MusicalManifestation
Range:	dcterms:MediaType
Sub-property-of:	dcterms:format

Property: mo:medley_of - unstable - level 1

medley_of - Indicates that a musical expression is a medley of several other musical expressions.

This means that the orignial musical expression were rearranged to create a new musical expression in the form of a medley.

Domain:
Range:
Sub-property-of:	derived_from

Property: mo:member - stable - level 1

member - Indicates a member of a musical group

Domain:	MusicGroup
Range:	foaf:Agent
Sub-property-of:	foaf:member

Property: mo:member_of - unstable - level 1

member_of - Inverse of the foaf:member property

Domain:	foaf:Agent
Range:	foaf:Group
Inverse-of:	foaf:member

Property: mo:membership - testing - level 1

membership - Relates an agent with related membership events

Domain:	foaf:Agent
Range:	Membership

Property: mo:meter - testing - level 2

meter - Associates a musical work or a score with its meter

Range:
Domain:	Score	MusicalWork

Property: mo:movement - unstable - level 2

movement - Indicates that a musical work has movements

Domain:	MusicalWork
Range:	Movement

Property: mo:movement_number - unstable - level 2

movement_number - Indicates the position of a movement in a musical work.

Domain:	Movement
Range:	xsd:int

Property: mo:musicbrainz - stable - level 1

musicbrainz - Linking an agent, a track or a record to its corresponding Musicbrainz page.

Domain:	Signal	foaf:Agent	MusicalManifestation	MusicalWork
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:musicbrainz_guid - testing - level 1

musicbrainz_guid - Links an object to the corresponding Musicbrainz identifier

Range:
Domain:	Label	ReleaseEvent	Signal	SignalGroup	Record	Track	MusicArtist
Sub-property-of:	uuid

Property: mo:musicmoz - stable - level 1

musicmoz - Used to link an artist, a musical work or the expression of a musical work to its corresponding MusicMoz page.

Domain:	MusicalManifestation	MusicalExpression	MusicalWork	MusicArtist
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:myspace - stable - level 1

myspace - Used to link a person to its corresponding MySpace page.

Domain:	foaf:Agent
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:olga - stable - level 1

olga - Used to link a track to a tabulature file for track in the On-Line Guitar Archive.

Domain:	Track
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:onlinecommunity - stable - level 1

onlinecommunity - Used to link a person with an online community web page like a blog, a wiki, a forum, a livejournal page, Etc.

Domain:	foaf:Agent
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:opus - stable - level 2

opus - Used to define a creative work, especially a musical composition numbered to designate the order of a composer's works.

Domain:	MusicalWork
Range:	rdfs:Literal

Property: mo:origin - testing - level 1

origin - Relates an artist to its geographic origin

Domain:	MusicArtist
Range:	geo:SpatialThing

Property: mo:other_release_of - unstable - level 1

other_release_of - Indicates that two musical manifestations are essentially the same.

Domain:	MusicalManifestation
Range:	MusicalManifestation

Property: mo:paid_download - stable - level 1

paid_download - Provide a link from an artist to a web page where all of that artist's musical work is available for some money,
or a link from a manifestation (record/track, for example) to a web page providing a paid access to this manifestation.

Domain:	CorporateBody	MusicArtist	frbr:Manifestation
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf	download

Property: mo:performance_of - unstable - level 2

performance_of - Associates a Performance to a musical work or an arrangement that is being used as a factor in it.
For example, I might use this property to attach the Magic Flute musical work to
a particular Performance.

Domain:	Performance
Range:	MusicalWork	Score
Inverse-of:	mo:performed_in
Sub-property-of:	event:factor

Property: mo:performed - unstable - level 2

performed - Relates agents to the performances they were performing in

Domain:	foaf:Agent
Range:	Performance
Inverse-of:	mo:performer
Sub-property-of:	event:isAgentIn

Property: mo:performed_in - unstable - level 2

performed_in - Associates a Musical Work or an Score to Performances in which they were
a factor. For example, I might use this property in order to
associate the Magic Flute to a particular performance at the Opera
Bastille last year.

Domain:	MusicalWork	Score
Range:	Performance
Inverse-of:	mo:performance_of
Sub-property-of:	event:isFactorOf

Property: mo:performer - stable - level 2

performer - Relates a performance to the performers involved

Domain:	Performance
Range:	foaf:Agent
Inverse-of:	mo:performed
Sub-property-of:	event:agent

Property: mo:possess_item - stable - level 1

possess_item - A person, a group of person or an organization possessing an exemplar of a single manifestation.

Domain:	foaf:Agent
Range:	frbr:Item

Property: mo:preview - testing - level 1

preview - Relates a musical manifestation to a musical item (this album, and my particular cd), which holds
a preview of the manifestation (eg. one track for an album, or a snippet for a track)

Domain:	MusicalManifestation
Range:	MusicalItem
Sub-property-of:	available_as

Property: mo:preview_download - stable - level 1

preview_download - This property can be used to link from a person to the website where they make previews of their works available, or from
a manifestation (a track or an album, for example) to a web page where a preview download is available.

This property MUST be used only if the content is just available through a web page (holding, for example
a Flash application) - it is better to link to actual content directly through the use of mo:available_as and
mo:Stream, mo:Torrent or mo:ED2K, etc. Therefore, Semantic Web user agents that don't know how to read HTML and even
less to rip streams from Flash applications can still access the audio content.

Domain:	CorporateBody	foaf:Agent	frbr:Manifestation
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf	download

Property: mo:primary_instrument - testing - level 1

primary_instrument - Indicates that an artist primarily plays an instrument, or that a member was primarily playing a particular instrument during his membership

Domain:	foaf:Agent	Membership
Range:	Instrument

Property: mo:produced - stable - level 1

produced - Used to relate an person or a group of person who produced the manifestation of a work.

Domain:	foaf:Agent
Range:	MusicalManifestation
Inverse-of:	mo:producer

Property: mo:produced_score - unstable - level 2

produced_score - Associates an arrangement event to a score product (score here does not refer to a published score, but more
an abstract arrangement of a particular work).

Domain:	Arrangement
Range:	Score
Sub-property-of:	event:product

Property: mo:produced_signal - stable - level 2

produced_signal - Associates a Recording to the outputted signal.

Domain:	Recording
Range:	Signal
Sub-property-of:	event:product

Property: mo:produced_signal_group - testing - level 2

produced_signal_group - Associates a recording session with a group of master signals produced by it.

Domain:	RecordingSession
Range:	SignalGroup
Sub-property-of:	event:product

Property: mo:produced_sound - stable - level 2

produced_sound - Associates a Performance to a physical Sound that is being produced by it.

Domain:	Performance
Range:	Sound
Sub-property-of:	event:product

Property: mo:produced_work - stable - level 2

produced_work - Associates a composition event to the produced MusicalWork. For example,
this property could link the event corresponding to the composition of the
Magic Flute in 1782 to the Magic Flute musical work itself. This musical work
can then be used in particular performances.

Domain:	Composition
Range:	MusicalWork
Inverse-of:	mo:composed_in
Sub-property-of:	event:product

Property: mo:producer - stable - level 1

producer - Used to relate the manifestation of a work to a person or a group of person who produced it.

Domain:	MusicalManifestation
Range:	foaf:Agent
Inverse-of:	mo:produced

Property: mo:publication_of - unstable - level 1

publication_of - Link a particular manifestation to the related signal, score, libretto, or lyrics

Domain:	MusicalManifestation
Range:	MusicalExpression
Inverse-of:	mo:published_as

Property: mo:published - unstable - level 1

published - Used to relate an person or a group of person who published the manifestation of a work.

Domain:	foaf:Agent
Range:	MusicalManifestation
Inverse-of:	mo:publisher

Property: mo:published_as - stable - level 1

published_as - Links a musical expression (e.g. a signal or a score) to one of its manifestations (e.g. a track on a particular record or a published score).

Domain:	MusicalExpression
Range:	MusicalManifestation
Inverse-of:	mo:publication_of
Sub-property-of:	frbr:embodiment

Property: mo:publisher - unstable - level 1

publisher - Used to relate a musical manifestation to a person or a group of person who published it.

Domain:	MusicalManifestation
Range:	foaf:Agent
Inverse-of:	mo:published

Property: mo:publishing_location - stable - level 1

publishing_location - Relates a musical manifestation to its publication location.

Domain:	MusicalManifestation
Range:	geo:SpatialThing

Property: mo:puid - stable - level 1

puid - Link a signal to the PUIDs associated with it, that is, PUID computed from MusicalItems (mo:AudioFile)
derived from this signal.
PUIDs (Portable Unique IDentifier) are the IDs used in the
proprietary MusicDNS AudioFingerprinting system which is operated by MusicIP.

Using PUIDs, one (with some luck) can identify the Signal object associated with a particular audio file, therefore allowing
to access further information (on which release this track is featured? etc.). Using some more metadata one can identify
the particular Track corresponding to the audio file (a track on a particular release).

Domain:	Signal
Range:	xsd:string

Property: mo:record - testing - level 1

record - Associates a release with the records it contains. A single release can be associated with multiple records, for example for a multi-disc release.

Domain:	Release
Range:	Record

Property: mo:record_count - testing - level 1

record_count - Associates a release with the number of records it contains, e.g. the number of discs it contains in the case of a multi-disc release.

Domain:	Release
Range:	xsd:int

Property: mo:record_number - testing - level 1

record_number - Indicates the position of a record in a release (e.g. a 2xLP, etc.).

Domain:	Record
Range:	xsd:nonNegativeInteger

Property: mo:record_side - testing - level 1

record_side - Associates the side on a vinyl record, where a track is located, e.g. A, B, C, etc. This property can then also be used
in conjunction with mo:track_number, so that one can infer e.g. "A1", that means, track number 1 on side A.

Domain:	Track
Range:	xsd:string

Property: mo:recorded_as - stable - level 2

recorded_as - This is a shortcut property, allowing to bypass all the Sound/Recording steps. This property
allows to directly link a Performance to the recorded Signal. This is recommended for "normal"
users. However, advanced users wanting to express things such as the location of the microphone will
have to create this shortcut as well as the whole workflow, in order to let the "normal" users access
simply the, well, simple information:-) .

Domain:	Performance
Range:	Signal
Inverse-of:	mo:records

Property: mo:recorded_in - unstable - level 2

recorded_in - Associates a physical Sound to a Recording event where it is being used
in order to produce a signal. For example, I might use this property to
associate the sound produced by a particular performance of the magic flute
to a given recording, done using my cell-phone.

Domain:	Sound
Range:	Recording
Inverse-of:	mo:recording_of
Sub-property-of:	event:isFactorOf

Property: mo:recording_of - stable - level 2

recording_of - Associates a Recording event to a physical Sound being recorded.
For example, I might use this property to
associate a given recording, done using my cell phone, to the
sound produced by a particular performance of the magic flute.

Domain:	Recording
Range:	Sound
Inverse-of:	mo:recorded_in
Sub-property-of:	event:factor

Property: mo:records - unstable - level 2

records - This is the inverse of the shortcut property recordedAs, allowing to relate directly a performance
to a signal.

Domain:	Signal
Range:	Performance
Inverse-of:	mo:recordedAs

Property: mo:release - testing - level 1

release - Associates a release with the corresponding release event

Domain:	ReleaseEvent
Range:	Release
Sub-property-of:	event:product

Property: mo:release_status - stable - level 1

release_status - Relates a musical manifestation to its release status (bootleg, ...)

Domain:	MusicalManifestation
Range:	ReleaseStatus

Property: mo:release_type - stable - level 1

release_type - Relates a musical manifestation to its release type (interview, spoken word, album, ...)

Domain:	MusicalManifestation
Range:	ReleaseType

Property: mo:remaster_of - unstable - level 1

remaster_of - This relates two musical work or the expression of a musical work, where one is a remaster of the other.

A remaster is a new version made for release from source recordings that were earlier released separately. This is usually done to improve the audio quality or adjust for more modern playback equipment. The process generally doesn't involve changing the music in any artistically important way. It may, however, result in tracks that are a few seconds longer or shorter.

Domain:
Range:
Sub-property-of:	derived_from

Property: mo:remix_of - unstable - level 1

remix_of - Used to relate the remix of a musical work in a substantially altered version produced by mixing together individual tracks or segments of an original musical source work.

Domain:
Range:
Sub-property-of:	derived_from

Property: mo:remixed - unstable - level 1

remixed - Used to relate an artist who remixed a musical work or the expression of a musical work.

This involves taking just one other musical work and using audio editing to make it sound like a significantly different, but usually still recognisable, song. It can be used to link an artist to a single song that they remixed, or, if they remixed an entire musical work.

Domain:	MusicArtist
Range:	Signal
Inverse-of:	mo:remixer

Property: mo:remixer - unstable - level 1

remixer - Used to relate a musical work or the expression of a musical work to an artist who remixed it.

This involves taking just one other musical work and using audio editing to make it sound like a significantly different, but usually still recognisable, song. It can be used to link an artist to a single song that they remixed, or, if they remixed an entire musical work.

Domain:
Range:
Inverse-of:	mo:remixed
Sub-property-of:	interpreter

Property: mo:review - stable - level 1

review - Used to link a work or the expression of a work to a review.

The review does not have to be open content, as long as it is accessible to the general internet population.

Domain:	frbr:Manifestation	frbr:Expression	frbr:Work
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Property: mo:sample_rate - stable - level 1

sample_rate - Associates a digital signal to its sample rate. It might be easier to express it this way instead of
defining a timeline map:-) Range is xsd:float.

Domain:	DigitalSignal
Range:	xsd:float

Property: mo:sampled - unstable - level 1

sampled - Used to relate an artist who sampled a Signal.

Domain:	MusicArtist
Range:	Signal
Inverse-of:	mo:sampler

Property: mo:sampled_version - stable - level 2

sampled_version - Associates an analog signal with a sampled version of it

Domain:	AnalogSignal
Range:	DigitalSignal
Inverse-of:	mo:sampled_version_of

Property: mo:sampled_version_of - stable - level 2

sampled_version_of - Associates a digital signal with the analog version of it

Domain:	DigitalSignal
Range:	AnalogSignal
Inverse-of:	mo:sampled_version
Sub-property-of:	derived_from

Property: mo:sampler - unstable - level 1

sampler - Used to relate the signal of a musical work to an artist who sampled it.

Domain:
Range:
Inverse-of:	mo:sampled
Sub-property-of:	interpreter

Property: mo:sell_item - stable - level 1

sell_item - A person, a group of person or an organization selling an exemplar of a single manifestation.

Domain:	foaf:Agent
Range:	frbr:Item

Property: mo:signal - testing - level 1

signal - Associates a group of signals with one of the signals it contains

Domain:	SignalGroup
Range:	Signal

Property: mo:similar_to - unstable - level 1

similar_to - A similarity relationships between two objects (so far, either an agent, a signal or a genre, but
this could grow).
This relationship is pretty general and doesn't make any assumptions on how the similarity claim
was derived.
Such similarity statements can come from a range of different sources (Musicbrainz similarities between
artists, or coming from some automatic content analysis).
However, the origin of such statements should be kept using a named graph approach - and ultimately, the
documents providing such statements should attach some metadata to themselves (confidence of the claim, etc.).

Domain:	Genre	MusicalItem	MusicalManifestation	MusicalExpression	MusicalWork	foaf:Agent
Range:	Genre	MusicalItem	MusicalManifestation	MusicalExpression	MusicalWork	foaf:Agent

Property: mo:singer - stable - level 2

singer - Relates a performance to an involved singer

Domain:	Performance
Range:	foaf:Agent
Sub-property-of:	performer

Property: mo:supporting_musician - unstable - level 1

supporting_musician - Used to relate an artist doing long-time instrumental or vocal support for another artist.

Domain:	MusicArtist
Range:	MusicArtist

Property: mo:tempo - stable - level 2

tempo - Rate of speed or pace of music. Tempo markings are traditionally given in Italian;
common markings include: grave (solemn; very, very slow); largo (broad; very slow);
adagio (quite slow); andante (a walking pace); moderato (moderate); allegro (fast; cheerful);
vivace (lively); presto (very fast); accelerando (getting faster); ritardando (getting slower);
and a tempo (in time; returning to the original pace).

Domain:	Signal	Performance	MusicalWork
Range:	xsd:string

Property: mo:text - testing - level 2

text - Associates lyrics with their text.

Range:
Domain:	Lyrics

Property: mo:time - stable - level 1

time - Associates a Signal to a time object - its actual domain

Domain:	Signal
Range:	time:TemporalEntity

Property: mo:track - stable - level 1

track - Indicates a part of a musical manifestation - in this particular case, a track.

Domain:	Record
Range:	Track

Property: mo:track_count - testing - level 1

track_count - The track count of a record

Domain:	Record
Range:	xsd:int

Property: mo:track_number - stable - level 1

track_number - Indicates the position of a track on a record medium (a CD, etc.).

Domain:	Track
Range:	xsd:nonNegativeInteger

Property: mo:translation_of - unstable - level 1

translation_of - Indicates that a work or the expression of a work has translated or transliterated into another expression of a work.

Domain:	frbr:Expression
Range:	frbr:Expression

Property: mo:tribute_to - unstable - level 1

tribute_to - Indicates a musical work or the expression of a musical work that is a tribute to an artist - normally consisting of music being composed by the artist but performed by other artists.

Domain:	MusicalManifestation
Range:	MusicArtist

Property: mo:trmid - stable - level 1

trmid - Indicates the TRMID of a track.
TRM IDs are MusicBrainz' old AudioFingerprinting system.
TRM (TRM Recognizes Music) IDs are (somewhat) unique ids that represent
the audio signature of a musical piece (see AudioFingerprint).

Domain:	Signal
Range:	xsd:string

Property: mo:upc - testing - level 1

upc - UPC stands for "Universal Product Code", which was the original barcode used in the United States and Canada. The UPC (now officially EAN.UCC-12 is a numerical method of identifying products without redundancy worldwide for all types of products in the retail sector. The EAN is a superset of the original UPC increasing the digits to 13 with the prefix 0 reserved for UPC. As of 2005, manufacturers are only allowed to use the new 13-digit codes on their items, rather than having two separate numbers.

Domain:	Release
Range:	xsd:string
Sub-property-of:	gtin

Property: mo:uuid - testing - level 1

uuid - Links an object to an universally unique identifier for it.

Range:
Domain:	owl:Thing
Sub-property-of:	dcterms:identifier

Property: mo:want_item - stable - level 1

want_item - A person, a group of person or an organization wanting an exemplar of a single manifestation.

Domain:	foaf:Agent
Range:	frbr:Item

Property: mo:wikipedia - stable - level 1

wikipedia - Used to link an work, an expression of a work, a manifestation of a work,
a person, an instrument or a musical genre to its corresponding WikiPedia page.
The full URL should be used, not just the WikiName.

Domain:	Genre	Instrument	foaf:Agent	frbr:Item	frbr:Manifestation	frbr:Expression	frbr:Work
Range:	foaf:Document
Sub-property-of:	foaf:isPrimaryTopicOf

Individual: album - level 1

album - One or more track issued together. This is a type of MusicalManifestation defined by the musical industry.

Class:	mo:ReleaseType

Individual: audiobook - level 1

audio book - Book read by a narrator without music. This is a type of MusicalManifestation defined by the musical industry.

Class:	mo:ReleaseType

Individual: bootleg - level 1

bootleg - An unofficial/underground musical work or the expression of a musical work that was not sanctioned by the artist and/or the corporate body.

Class:	mo:ReleaseStatus

Individual: compilation - level 1

compilation - Collection of previously released manifestations of a musical expression by one or more artists. This is a type of MusicalManifestation defined by the musical industry.

Class:	mo:ReleaseType

Individual: ep - level 1

ep - An EP

Class:	mo:ReleaseType

Individual: interview - level 1

interview - Recording of the questioning of a person. This is a type of MusicalManifestation defined by the musical industry.

Class:	mo:ReleaseType

Individual: live - level 1

live - A musical manifestation that was recorded live. This is a type of MusicalManifestation defined by the musical industry.

Class:	mo:ReleaseType

Individual: official - level 1

official - Any musical work or the expression of a musical work officially sanctioned by the artist and/or their corporate body.

Class:	mo:ReleaseStatus

Individual: promotion - level 1

promotion - A giveaway musical work or the expression of a musical work intended to promote an upcoming official musical work or the expression of a musical work.

Class:	mo:ReleaseStatus

Individual: remix - level 1

remix - Musical manifestation that primarily contains remixed material. This is a type of MusicalManifestation defined by the musical industry.

Class:	mo:ReleaseType

Individual: single - level 1

single - A single or record single is a type of release, typically a recording of two tracks. In most cases, the single is a song that is released separately from an album, but it can still appear on an album.

Class:	mo:ReleaseType

Individual: soundtrack - level 1

soundtrack - Sound recording on a narrow strip of a motion picture film. This is a type of MusicalManifestation defined by the musical industry.

Class:	mo:ReleaseType

Individual: spokenword - level 1

spoken word - Spoken word is a form of music or artistic performance in which lyrics, poetry, or stories are spoken rather than sung. Spoken-word is often done with a musical background, but emphasis is kept on the speaker. This is a type of MusicalManifestation defined by the musical industry.

Class:	mo:ReleaseType

Deprecated: mo:availableAs

Equivalent to - mo:available_as

Deprecated: mo:eventHomePage

Equivalent to - mo:event_homepage

Deprecated: mo:freedownload

Equivalent to - mo:free_download

Deprecated: mo:has_track

Equivalent to - mo:track

Deprecated: mo:paiddownload

Equivalent to - mo:paid_download

Deprecated: mo:producesSignal

Equivalent to - mo:produced_signal

Deprecated: mo:producesSound

Equivalent to - mo:produced_sound

Deprecated: mo:productOfComposition

Equivalent to - mo:composed_in

Deprecated: mo:publicationOf

Equivalent to - mo:publication_of

Deprecated: mo:publishedAs

Equivalent to - mo:published_as

Deprecated: mo:publishingLocation

Equivalent to - mo:publishing_location

Deprecated: mo:releaseStatus

Equivalent to - mo:release_status

Deprecated: mo:releaseType

Equivalent to - mo:release_type

Deprecated: mo:sampleRate

Equivalent to - mo:sample_rate

Deprecated: mo:sampledVersionOf

Equivalent to - mo:sampled_version_of

Deprecated: mo:signalTime

Equivalent to - mo:time

Deprecated: mo:trackNum

Equivalent to - mo:track_number

Deprecated: mo:usedInPerformance

Equivalent to - mo:performed_in

Deprecated: mo:usedInRecording

Equivalent to - mo:recorded_in

Deprecated: mo:usesSound

Equivalent to - mo:recording_of

Deprecated: mo:usesWork

Equivalent to - mo:performance_of

Ontology namespaces referenced:

Prefix	XML Namespace	Specification
frbr	http://purl.org/vocab/frbr/core#	Expression of Core FRBR Concepts in RDF
timeline	http://purl.org/NET/c4dm/timeline.owl#	The TimeLine ontology
event	http://purl.org/NET/c4dm/event.owl#	The Event ontology
time	http://www.w3.org/TR/owl-time/	The Time ontology
dc	http://purl.org/dc/elements/1.1/	Dublin Core Element Set v1.1
dcterms	http://purl.org/dc/terms/	Dublin Core Element Refinements and Encoding Schemes
foaf	http://xmlns.com/foaf/0.1/	Friend of a Friend (FOAF) Vocabulary
rel	http://purl.org/vocab/relationship/	Relationship: A vocabulary for describing relationships between people

References

"Functional Requirements for Bibliographic Records - Final Report", 1998 by International Federation of Library Associations and Institutions, ISBN 3-598-11382-X. (http://www.ifla.org/VII/s13/frbr/frbr.htm.)
[RFC 2119] S. Bradner, "Key words for use in RFCs to Indicate Requirement Levels," RFC 2119, Harvard University, March 1997. (http://www.ietf.org/rfc/rfc2119.txt.)
[RFC 2396] T.Berners-Lee, et al, "Uniform Resource Identifiers (URI): Generic Syntax," RFC 2396, Internet Engineering Task Force, August 1998. (http://www.ietf.org/rfc/rfc2396.txt.)

Change Log

See the full changelog.

Music Ontology Specification

Specification Document

Abstract

Status of This Document

Table of Contents

Introduction

Terminology and Notation

Music Ontology At A Glance

Music Ontology Overview

MO Basics

MO Record Types

MO Release

MO Mediums

MO Performance Relationships

MO Signal Relationships

MO Musical Work Relationships

MO Musical Expression Relationships

MO Musical Item Trading Relationships

MO Record Relationships

MO Arrangement Relationships

MO Musical Expression/Manifestation Relationships

MO Musical Manifestation / Musical Item Relationships

MO Publication Relationships

MO Other Versions Relationships

MO workflow properties

MO Production Relationships

MO Musical Association Relationships

MO Affiliate Relationships

MO External web document links Relationships

MO Get Music Relationships

MO Music Communities Relationships

MO Show/Festival Relationships

Music Ontology Classes Hierarchy

RDF Document Examples

Examples of SPARQL queries against these RDF graphs

Background

The Music Ontology Description

Evolution and Extension of the Music Ontology

Music Ontology Modules

Time, TimeLine and Event

Music Creation Workflow

The Music Ontology and Standards

The Music Ontology and RDF

The Music Ontology cross-reference: Classes, Properties and Individuals

Classes, Properties and Individuals (full detail)

Class: mo:Activity - testing - level 1

Class: mo:AnalogSignal - stable - level 2

Class: mo:Arrangement - stable - level 2

Class: mo:AudioFile - unstable - level 1

Class: mo:CD - unstable - level 1

Class: mo:Composition - stable - level 2

Class: mo:CorporateBody - stable - level 1

Class: mo:DAT - unstable - level 1

Class: mo:DCC - unstable - level 1

Class: mo:DVDA - unstable - level 1

Class: mo:DigitalSignal - stable - level 2

Class: mo:ED2K - unstable - level 1

Class: mo:Festival - stable - level 2

Class: mo:Genre - stable - level 2

Class: mo:Instrument - stable - level 2

Class: mo:Instrumentation - stable - level 2

Class: mo:Label - stable - level 1

Class: mo:Libretto - stable - level 2

Class: mo:Lyrics - stable - level 2

Class: mo:MD - unstable - level 1

Class: mo:MagneticTape - unstable - level 1

Class: mo:Medium - unstable - level 1

Class: mo:Membership - testing - level 1

Class: mo:Movement - unstable - level 2

Class: mo:MusicArtist - stable - level 1

Class: mo:MusicGroup - stable - level 1

Class: mo:MusicalExpression - unstable - level 1

Class: mo:MusicalItem - unstable - level 1

Class: mo:MusicalManifestation - stable - level 1

Class: mo:MusicalWork - stable - level 2

Class: mo:Orchestration - stable - level 2

Class: mo:Performance - stable - level 2

Class: mo:PublishedLibretto - stable - level 2

Class: mo:PublishedLyrics - stable - level 2

Class: mo:PublishedScore - stable - level 2

MO Performance
Relationships

MO Signal
Relationships

MO Musical Work
Relationships

MO Musical Expression
Relationships

MO Musical Item
Trading Relationships

MO Record
Relationships

MO Arrangement
Relationships

MO Musical Expression/
Manifestation
Relationships

MO Musical Manifestation /
Musical Item
Relationships

MO Publication
Relationships

MO Other Versions
Relationships

MO Production
Relationships

MO Musical Association
Relationships

MO Affiliate
Relationships

MO External web document links
Relationships

MO Get Music
Relationships

MO Music Communities
Relationships

MO Show/Festival
Relationships