Audio CD Ontology

[Nicholas J Humfrey]

Hello,

I was just thinking about how to represent the metadata about an Audio CD. Many of the classes and properties are already in the Music Ontology. Although I am not sure you can directly relate a Track to a CD?

Should this be a separate ontology, an extension to the Music Ontology or made a core part of the Music Ontology?

Here is the kind of thing I was thinking:

_:cd1
a cdda:Disc ;
cdda:freedb_id "ac0e3c0c" ;
cdda:disc_id "TML16C24mxCWd.1adALJ4NG3Y0k-" ;
cdda:sectors 273492 ;

cdda:track [
a cdda:Track ;
cdda:track_number 1 ;
cdda:offset 150 ;
cdda:length 10795 ;
cdda:isrc "USVI20900428" ;
] ;

The offset and length are measured in sectors (1 sector = 1/75 second).

Full example here:
http://www.aelius.com/njh/tmp/cdda.ttl

nick.

[Yves Raimond]

Hello!

I was just thinking about how to represent the metadata about an Audio CD. Many of the classes and properties are already in the Music Ontology. Although I am not 

sure you can directly relate a Track to a CD?

I would hope the new release solves that - a mo:Record is equivalent to 'medium' in the musicbrainz NGS, so encompasses individual CDs. Multi-CD releases can be described using the mo:Release concept.
 

Should this be a separate ontology, an extension to the Music Ontology or made a core part of the Music Ontology?


Here is the kind of thing I was thinking:

_:cd1
 a cdda:Disc ;
 cdda:freedb_id "ac0e3c0c" ;
 cdda:disc_id "TML16C24mxCWd.1adALJ4NG3Y0k-" ;
 cdda:sectors 273492 ;

 cdda:track [
     a cdda:Track ;
     cdda:track_number 1 ;
     cdda:offset 150 ;
     cdda:length 10795 ;
     cdda:isrc "USVI20900428" ;
 ] ;

The offset and length are measured in sectors (1 sector = 1/75 second).

I think the properties cdda:freedb_id, cdda:disc_id (is that the same as the catalogue number? if so, we have it already), cdda:sectors, cdda:offset (isrc is already in MO) would be good to add in MO, with a range of mo:Record and mo:Track?

Cheers.
y

Full example here:
http://www.aelius.com/njh/tmp/cdda.ttl


nick.

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[Nicholas J Humfrey]

On 10 Mar 2010, at 09:58, Yves Raimond <yves.r...@gmail.com> wrote:

Hello!

I was just thinking about how to represent the metadata about an Audio CD. Many of the classes and properties are already in the Music Ontology. Although I am not 

sure you can directly relate a Track to a CD?

I would hope the new release solves that - a mo:Record is equivalent to 'medium' in the musicbrainz NGS, so encompasses individual CDs. Multi-CD releases can be described using the mo:Release concept.

On train and being lazy asking, but is mo:CD a subclass of mo:Record?

 

Should this be a separate ontology, an extension to the Music Ontology or made a core part of the Music Ontology?


Here is the kind of thing I was thinking:

_:cd1
 a cdda:Disc ;
 cdda:freedb_id "ac0e3c0c" ;
 cdda:disc_id "TML16C24mxCWd.1adALJ4NG3Y0k-" ;
 cdda:sectors 273492 ;

 cdda:track [
     a cdda:Track ;
     cdda:track_number 1 ;
     cdda:offset 150 ;
     cdda:length 10795 ;
     cdda:isrc "USVI20900428" ;
 ] ;

The offset and length are measured in sectors (1 sector = 1/75 second).

I think the properties cdda:freedb_id, cdda:disc_id (is that the same as the catalogue number? if so, we have it already), cdda:sectors, cdda:offset (isrc is already in MO) would be good to add in MO, with a range of mo:Record and mo:Track?

cdda:disc_id is the musicbrainz DiscId, also sometimes called CD Index.

I think cdda:offset and cdda:length only really apply to CDs. 

I might make a perl script to generate RDF from audio CDs.

nick.

[Loïc DIAS DA SILVA]

On Thu, Mar 11, 2010 at 10:32 AM, Nicholas J Humfrey <n...@aelius.com> wrote:

On 10 Mar 2010, at 09:58, Yves Raimond <yves.r...@gmail.com> wrote:

Hello!

I was just thinking about how to represent the metadata about an Audio CD. Many of the classes and properties are already in the Music Ontology. Although I am not 

sure you can directly relate a Track to a CD?

I would hope the new release solves that - a mo:Record is equivalent to 'medium' in the musicbrainz NGS, so encompasses individual CDs. Multi-CD releases can be described using the mo:Release concept.

On train and being lazy asking, but is mo:CD a subclass of mo:Record?

<owl:Class rdf:about="http://purl.org/ontology/mo/CD">

<mo:level>1</mo:level>
<rdfs:comment>
Compact Disc used as medium to record a musical manifestation.
</rdfs:comment>
<rdfs:isDefinedBy rdf:resource="http://purl.org/ontology/mo/"/>
<rdfs:label>CD</rdfs:label>
<rdfs:subClassOf rdf:resource="http://purl.org/ontology/mo/Medium"/>
<vs:term_status>unstable</vs:term_status>

</owl:Class>

see http://wiki.musicontology.com/index.php/Classes_Schemas#mo:MusicalManifestation_schema

ex : http://wiki.musicontology.com/index.php/Here_is_a_basic_document_describing_an_Album_and_its_Tracks

 1    <mo:Record rdf:about="http://zitgist.com/music/record/a89e1d92-5381-4dab-ba51-733137d0e431">

 2           <dc:title>Kill 'em All</dc:title>
 3           <foaf:maker rdf:resource="http://zitgist.com/music/artist/65f4f0c5-ef9e-490c-aee3-909e7ae6b2ab"/>

 4           <dcterms:created>1983-07-13T00:00:00Z</dcterms:created>
 5           <mo:release_type rdf:resource="http://purl.org/ontology/mo/album"/>

 6           <mo:release_status rdf:resource="http://purl.org/ontology/mo/official"/>
 7           <mo:image rdf:resource="http://ec1.images-amazon.com/images/P/B00000B9AN.01._AA180_SCLZZZZZZZ_.jpg" />

 8           <mo:amazon_asin rdf:resource="http://amazon.com/exec/obidos/ASIN/B00000B9AN/" />
 9           <mo:track rdf:resource="http://zitgist.com/music/track/8467f4e7-ef5b-458c-bbc5-6727d9f2252d" mo:trackNum="1" />

 10    	   ...
 11           <mo:track rdf:resource="http://zitgist.com/music/track/833bcfc4-8c89-49d8-be52-4eb926b48ab0" mo:trackNum="10" />

 12    </mo:Record> 

and if you want to link to a particular CD you can add :

<mo:Record rdf:about="http://zitgist.com/music/record/a89e1d92-5381-4dab-ba51-733137d0e431">

<mo:available_as>

<mo:CD rdf:resource="http://aelius.com/myCDS/546465" />

</mo:available_as>

</mo:Record>

Is it what you want ?

--
mglcel-at-mglcel-dot-fr

[Bob Ferris]

Hi Nick,

maybe this schema will help you to get the relation between this
different concepts.

http://wiki.musicontology.com/index.php/Class_Schemas#mo:MusicalManifestation_and_mo:MusicalItem_schema

-mo:CD is a subclass of mo:Medium, which is a subclass of mo:MusicalItem
(which is a subclass of frbr:Item)
-mo:Record is a subclass of mo:MusicalManifestation (which is a subclass
of frbr:Manifestation)
-these concepts are connected with the property mo:available_as, which
is a subproperty of:frbr:exemplar
-they are also an a different level: mo:CD is on the "Item level" and
mo:Record is on the "Manifestation level", that means that this concept
is a more abstract one and can have more general descriptive properties
and features

Cheers,

zazi