This example shows an extended music artist recommendation modeled as rec:RankedRecommendation instance. It is based on the music artists recommendations of James Brown from Last.fm. Hence, the subject of the rec:recommendation relation is a resolvable URI to a description of James Brown at MusicBrainz, modeled and represented as Semantic Graph and provided by DBTune. Since a rec:RankedRecommendation is a sub class of rec:Recommendation and olo:OrderedList, it can also make use of ordered list features. That means, this enables the opportunity to also provide an ordered (/ranked) list of recommendation objects (related by rec:ranked_recommendation_object), by hiding the details of their ranking features on this level. These details are provided by further association statements (here sim:Similarity) related by using the ao:included_association property. Each slot item (related by olo:item) is also a music artist description at MusicBrainz, modeled and represented as Semantic Graph and provided by DBTune. Furthermore, each similarity statement (sim:Similarity) includes * the seed music artist (related by sim:subject), on which this similarity calculation is based on, * the other music artist (related by sim:object), * the weight of the similarity (related by sim:weight) and * the association (here similarity) method (related by sim:method) of the similarity calculation. This association method ( sim:AssociationMethod) can not be further specified here, because it is based on a proprietary algoritm from Last.fm. Therefore, the complete recommendation (related by rec:recommender) and also the association method itself (related by is:info_service) is associated to the Information Service Last.fm.
@prefix rec: <http://purl.org/ontology/rec/core#> .
@prefix ex: <http://example.org/> .
@prefix olo: <http://purl.org/ontology/olo/core#> .
@prefix isi: <http://purl.org/ontology/is/inst/> .
@prefix ao: <http://purl.org/ontology/ao/core#> .
@prefix sim: <http://purl.org/ontology/similarity/> .
@prefix is: <http://purl.org/ontology/is/core#> .
<http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3>
rec:recommendation ex:AMusicRecommendation .
ex:AMusicRecommendation a rec:RankedRecommendation ;
rec:recommender isi:lastfm ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3< ;
rec:ranked_recommendation_object [
a olo:Slot ;
olo:item <http://dbtune.org/musicbrainz/resource/track/097c362d-72b7-4a53-96e2-d9ff02f8be1f> ;
olo:index 1
] ;
rec:ranked_recommendation_object [
a olo:Slot ;
olo:item <http://dbtune.org/musicbrainz/resource/track/161d35d9-3e31-41e9-8392-cf5d2c03b31d> ;
olo:index 2
] ;
rec:ranked_recommendation_object [
a olo:Slot ;
olo:item <http://dbtune.org/musicbrainz/resource/track/093c1742-ebda-45cd-a50c-734e5d92e7f2> ;
olo:index 3
] ;
rec:ranked_recommendation_object [
a olo:Slot ;
olo:item <http://dbtune.org/musicbrainz/resource/track/0a208327-525a-429b-8e79-51669bfb81f7> ;
olo:index 4
] ;
rec:ranked_recommendation_object [
a olo:Slot ;
olo:item <http://dbtune.org/musicbrainz/resource/track/0161855d-0b98-4f2d-b2ab-446dbd8d6759> ;
olo:index 5
] ;
rec:ranked_recommendation_object [
a olo:Slot ;
olo:item <http://dbtune.org/musicbrainz/resource/track/014f2510-e653-43e9-862a-880ac6388bb1> ;
olo:index 6
] ;
rec:ranked_recommendation_object [
a olo:Slot ;
olo:item <http://dbtune.org/musicbrainz/resource/track/0ab210b0-18c6-4c52-aee7-78f6012b9192> ;
olo:index 7
] ;
rec:ranked_recommendation_object [
a olo:Slot ;
olo:item <http://dbtune.org/musicbrainz/resource/track/027326ef-1455-48c9-8543-ac908eb71925> ;
olo:index 8
] ;
rec:ranked_recommendation_object [
a olo:Slot ;
olo:item <http://dbtune.org/musicbrainz/resource/track/04dc3d0b-dff4-41a0-8bf3-12b4b34460a6> ;
olo:index 9
] ;
rec:ranked_recommendation_object [
a olo:Slot ;
olo:item <http://dbtune.org/musicbrainz/resource/track/0348eea1-8178-4dc1-8a37-d09b5897ace2> ;
olo:index 10
] ;
ao:included_association ex:SimAssociation01 ;
ao:included_association ex:SimAssociation02 ;
ao:included_association ex:SimAssociation03 ;
ao:included_association ex:SimAssociation04 ;
ao:included_association ex:SimAssociation05 ;
ao:included_association ex:SimAssociation06 ;
ao:included_association ex:SimAssociation07 ;
ao:included_association ex:SimAssociation08 ;
ao:included_association ex:SimAssociation09 ;
ao:included_association ex:SimAssociation10 .
ex:lfmTrackSimilarity a sim:AssociationMethod ;
is:info_service isi:lastfm .
ex:Association01 a sim:Similarity ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3> ;
sim:object <http://dbtune.org/musicbrainz/resource/track/097c362d-72b7-4a53-96e2-d9ff02f8be1f> ;
sim:weight 1.0 ;
sim:method ex:lfmTrackSimilarity .
ex:Association02 a sim:Similarity ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3> ;
sim:object <http://dbtune.org/musicbrainz/resource/track/161d35d9-3e31-41e9-8392-cf5d2c03b31d> ;
sim:weight 0.968842 ;
sim:method ex:lfmTrackSimilarity .
ex:Association03 a sim:Similarity ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3> ;
sim:object <http://dbtune.org/musicbrainz/resource/track/093c1742-ebda-45cd-a50c-734e5d92e7f2> ;
sim:weight 0.547951 ;
sim:method ex:lfmTrackSimilarity .
ex:Association04 a sim:Similarity ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3> ;
sim:object <http://dbtune.org/musicbrainz/resource/track/0a208327-525a-429b-8e79-51669bfb81f7> ;
sim:weight 0.449539 ;
sim:method ex:lfmTrackSimilarity .
ex:Association05 a sim:Similarity ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3> ;
sim:object <http://dbtune.org/musicbrainz/resource/track/0161855d-0b98-4f2d-b2ab-446dbd8d6759> ;
sim:weight 0.401746 ;
sim:method ex:lfmTrackSimilarity .
ex:Association06 a sim:Similarity ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3> ;
sim:object <http://dbtune.org/musicbrainz/resource/track/014f2510-e653-43e9-862a-880ac6388bb1> ;
sim:weight 0.36673 ;
sim:method ex:lfmTrackSimilarity .
ex:Association07 a sim:Similarity ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3> ;
sim:object <http://dbtune.org/musicbrainz/resource/track/0ab210b0-18c6-4c52-aee7-78f6012b9192> ;
sim:weight 0.36142 ;
sim:method ex:lfmTrackSimilarity .
ex:Association08 a sim:Similarity ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3> ;
sim:object <http://dbtune.org/musicbrainz/resource/track/027326ef-1455-48c9-8543-ac908eb71925> ;
sim:weight 0.351277 ;
sim:method ex:lfmTrackSimilarity .
ex:Association09 a sim:Similarity ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3> ;
sim:object <http://dbtune.org/musicbrainz/resource/track/04dc3d0b-dff4-41a0-8bf3-12b4b34460a6> ;
sim:weight 0.350151 ;
sim:method ex:lfmTrackSimilarity .
ex:Association10 a sim:Similarity ;
sim:subject <http://dbtune.org/musicbrainz/resource/track/008e72df-6469-4557-8b5b-c54c3285fbd3> ;
sim:object <http://dbtune.org/musicbrainz/resource/track/0348eea1-8178-4dc1-8a37-d09b5897ace2> ;
sim:weight 0.336997 ;
sim:method ex:lfmTrackSimilarity .