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Version 1.04 (February 16, 2007)
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   * ADDED: Clear conceptual separation between MusicalExpression and the
   process leading to it:
      * MusicalExpression:
         * Sound subClassOf MusicalExpression,Event
         * Score subClassOf MusicalExpression
         * Signal subClassOf MusicalExpression,Event
	    * DigitalSignal subClassOf Signal
	    * ContinuousSignal subClassOf Signal
         * Lyrics subClassOf MusicalExpression
         * Libretto subClassOf MusicalExpression
      * Events leading (eventually) to MusicalExpression
         * Performance subClassOf Event
         * Arrangement subClassOf Event
	   * Orchestration subClassOf Arrangement
	   * Instrumentation subClassOf Arrangement
         * Composition subClassOf Event
         * Recording subClassOf Event

   * ADDED: sub properties of hasAgent, related to Performance:
      * performer/performed
      * conductor/conducted
      * listener/listened
   and related to Recording AND Performance
      * engineer/engineered

   * ADDED: PublishedScore - a published score

   * ADDED: PublishedLibretto - a published libretto

   * ADDED: PublishedLyrics - published lyrics

   * ADDED: Record, a musical manifestation which first aim is to render the
   product of a recording

   * ADDED: Album/Interview/SpokenWork subClassOf MusicalManifestation

   * ADDED: rdf:type owl:Class everywhere:-)

   * ADDED: RDFS wrappers for the relevant classes of the following DL
   ontologies: owl-time, event, and timeline

   * ADDED: Changed Interview/Album/Live/... to individuals, instance of a
   class ReleaseType, same for Bootleg/..., individuals of a class
   ReleaseStatus

   * ADDED: Properties to link MusicalManifestation to items, status, and
   types

   * REMOVED: MusicalItem subClassOf MusicalManifestation, frbr:Manifestation

   * REMOVED: mo:title, use dc:title instead

   * REMOVED: mo:record, use mo:publishedAs instead (which goes from
   Signal,Score,Lyrics,Libretto to
   Record,PublishedScore,PublishedLyrics,PublishedLibretto)

   * REMOVED: member_of, use foaf:member, now a MusicalGroup is a foaf:Group

   * REMOVED: realization_of, and inverse, use a Performance, or a Performance
   and a Recording

   * REMOVED: mo:duration, use event:time instead (a Work cannot have a
   duration, btw). it seems like dc:format may be used for this as well (see
   http://dublincore.org/documents/format-element/)

   * REMOVED: second occurence of tempo

   * REMOVED: recordingstudio, use the place of a recording event instead

   * REMOVED: composer, use dc:creator instead

   * REMOVED: composed, use Composition

   * REMOVED: performed/performer/orchestrated/... use Performance / performer /
   performed/orchestrator/... (subProperties of hasAgent)

   * REMOVED: provided_instrumentation / provider_of_instrumentation, use
   Arrangement

   * REMOVED: wrote_lyrics, just use dc:creator on the Lyrics instance, and
   this as a factor of the performance - same thing for Libretto

   * REMOVED: arranged, use Arrangement

   * REMOVED: instrument, trying to model a 3ary predicate... use a
   Performance

   * Changed: CorporateBody subClassOf foaf:Organization

   * Changed: SoloMusicArtist subClassOf foaf:Person, mo:MusicArtist

   * Changed: MusicGroup subClassOf foaf:Group, mo:MusicArtist

   * Changed: Album, Interview, SpokenWord, AudioBook, Compilation, Live,
   Remix, Soundtrack subClassOf MusicalManifestation

   * Changed: Release status is just linked to the Manifestation, neither the
   Work or the Expression

   * Changed: bpm/tempo/key has as a domain both MusicalWork (unchanged) and Performance
   (this is a factor of the performance, not of the "sound")

   * Changed: has_movement was pointing towards a bad URI

   * Changed: pitch/domain has as a domain Sound (pitch for MusicalWork?)

   * Changed: djmixed has as a range MusicalManifestation (DJs work with
   actual vynils/tracks...)

   * Changed: second occurence of djmixed to djmixed_by

   * Changed: remix_of goes from MusicalManifestation to MusicalManifestation
   (this track is a remix of this other track?)

   * Changed: same thing for medley_of (this track is a medley of this track,
   this track, this track)

NOTES: 
 * Address the issue of multityping,dc:format,medium,item...
 * Instrument taxonomy, integrated in MO? --> cultural information, we need
 some freedom here
 * Same thing for Genre
 * use dc:format AND mo:encoding, and use instances instead of literals as
 objects?
 * work out wether puid/trmid has to be associated to signals (best) or
 sounds (easier) - perhaps in a "best practice" document
 * pitch?? what do we mean exactly by that?
 * is similarity mature enough to be included?
 * remix/tributes/and so on... seems really complex to me... but it seems ok
 as it is now -- SHOULD BE SEEN AS *SHORTCUTS* -- easier to query -- but not
 fully expressive, and not robust at all (might change)
 * I am really worried about remix_of, medley_of... seems to me that it should
 occur on MusicalManifestation. otherwise, describe a Performance where other
 ME are involved ?