Hi, guys I have two questions about music ontology. 1. Where is the sparql endpoint which I can execute the sparql examples? 2. Is there any RDF dump of the whole database?
> Hi, guys > I have two questions about music ontology. > 1. Where is the sparql endpoint which I can execute the sparql examples?
Generally, the examples are somehow arbitrary. However, it could be the case that some of them are derived from SPARQL queries on a working SPARQL endpoint. You can find a list of "proof-of-concept" datasets with SPARQL endpoints that especially make use of the Music Ontology at dbtune.org [1]. Furthermore, there are various datasets out there that make use of the music ontology, e.g., BBC Music [2], which has an API to access this data [3] (I don't know whether related SPARQL endpoint is still alive, yvesr?).
> 2. Is there any RDF dump of the whole database?
Which whole database? The Music Ontology is a Semantic Web ontology to power knowledge bases to be able to represent some knowledge of the music domain, i.e., every knowledge base which likes to address such knowledge representations can make use of the Music Ontology. So, there is no such "whole database" generally, although, there are such things like the LOD cloud cache [4], which tries to include a huge amount of the data that is available in the LOD cloud.
Hi, Bob I know that the goal of Music ontology is to construct the knowledge of music entities. But Where is the knowledge data stored? Is the data stored as RDF type? If so, how can I get it?
Regards, Zhou Wenlei
On 9 April 2011 18:01, Bob Ferris <z...@elbklang.net> wrote:
>> Hi, guys >> I have two questions about music ontology. >> 1. Where is the sparql endpoint which I can execute the sparql examples?
> Generally, the examples are somehow arbitrary. However, it could be the > case that some of them are derived from SPARQL queries on a working SPARQL > endpoint. You can find a list of "proof-of-concept" datasets with SPARQL > endpoints that especially make use of the Music Ontology at dbtune.org[1]. Furthermore, there are various datasets out there that make use of the > music ontology, e.g., BBC Music [2], which has an API to access this data > [3] (I don't know whether related SPARQL endpoint is still alive, yvesr?).
> 2. Is there any RDF dump of the whole database?
> Which whole database? The Music Ontology is a Semantic Web ontology to > power knowledge bases to be able to represent some knowledge of the music > domain, i.e., every knowledge base which likes to address such knowledge > representations can make use of the Music Ontology. So, there is no such > "whole database" generally, although, there are such things like the LOD > cloud cache [4], which tries to include a huge amount of the data that is > available in the LOD cloud.
> Hi, Bob > I know that the goal of Music ontology is to construct the knowledge of > music entities. But Where is the knowledge data stored? Is the data stored > as RDF type? If so, how can I get it?
> Regards, > Zhou Wenlei
> On 9 April 2011 18:01, Bob Ferris <z...@elbklang.net> wrote:
>> Hi Zhou,
>> On 4/9/2011 9:30 AM, wenlei zhou wrote:
>>> Hi, guys >>> I have two questions about music ontology. >>> 1. Where is the sparql endpoint which I can execute the sparql examples?
>> Generally, the examples are somehow arbitrary. However, it could be the >> case that some of them are derived from SPARQL queries on a working SPARQL >> endpoint. You can find a list of "proof-of-concept" datasets with SPARQL >> endpoints that especially make use of the Music Ontology at dbtune.org[1]. Furthermore, there are various datasets out there that make use of the >> music ontology, e.g., BBC Music [2], which has an API to access this data >> [3] (I don't know whether related SPARQL endpoint is still alive, yvesr?).
>> 2. Is there any RDF dump of the whole database?
>> Which whole database? The Music Ontology is a Semantic Web ontology to >> power knowledge bases to be able to represent some knowledge of the music >> domain, i.e., every knowledge base which likes to address such knowledge >> representations can make use of the Music Ontology. So, there is no such >> "whole database" generally, although, there are such things like the LOD >> cloud cache [4], which tries to include a huge amount of the data that is >> available in the LOD cloud.
> Can I say that Music Ontology Just defined the vocabulary\schema of
> music entities?
Yeah, that is what a Semantic Web ontology typical does today. You can
treat such ontologies* like vocabularies/schemata. One advantage of
such publishes ontologies is that everyone can be able to use them if
they are available in public. In contrast, a database schema usually
is proprietary and often only used by one system that deploys that
schema. For that reason, e.g., every music metadata related service,
such as MusicBrainz, Discogs or AllMusic can make use of the Music
Ontology to deliver a kind of "shared understanding".
> On 9 April 2011 22:09, wenlei zhou <wenlei.zho...@gmail.com
> <mailto:wenlei.zho...@gmail.com>> wrote:
> Hi, Bob
> I know that the goal of Music ontology is to construct the knowledge
> of music entities. But Where is the knowledge data stored? Is the
> data stored as RDF type? If so, how can I get it?
Semantic Web data is typically store in a triple store [1], which
usually a specific graph database system. However, one can also store
these knowledge representations a mature relational database system by
using a specific database schema, e.g., that one from Jena [2].
Albeit, this mailing list is not really intended to clarify general
Semantic Web foundations. Therefore, you should maybe use of
appropriated literature (see, e.g., [4]) or q&a boards, such as
answers.semanticweb.com [3].
*) a more natural definition of ontology includes everything, i.e.,
vocabulary specifications and instance data (however, please don't be
confused from this point of view, and prefer the vocabulary-aligned
definition of 'ontology' for the beginning)
