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Querying OpenCalais classes or named entities

Querying OpenCalais classes or named entities
Posted on: Thu, 01/15/2009 - 09:16
dpdonohue
User offline. Last seen 3 years 18 weeks ago. Offline
Joined: 01/15/2009

Hello!  Lots to digest in the upcomming release of Calais 4.0.  Many thanks for such a dynamic service!

Could I query your ontology to lookup semantic classes?  I would like to e.g. query Calais for "person" and receive back a list of classes matching "person".  At your end, the search might do a text search on the rdfs:label and rdfs:comment properties of all classes, and return the URI, the name (label), and the description (comment) for each match.

Once I know a class, could I query Calais to get a list of known properties for that class?

Could I query for named entities matching a query term?  E.g. if I query for "Steve Jobs", could I retrieve the URI, name, description of Steve Jobs?

Best,

David Donohue

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Posted on: Fri, 03/06/2009 - 11:42 #1
Ofercalais
User offline. Last seen 1 year 3 weeks ago. Offline
Joined: 12/31/1969

Hi,

I assume you refer to searching our Linked Data repository.

We do not provide seach capabilities for our Linked Data at the moment.

For each documents you send to open calais (to api1.opencalais.com - R4) you get back RDF/XML file that includes all the URIs of all the entitis and you can look for specific entity types - for example - "person" entities as you mentioned.

If you do not want to keep the RDF/XML files, you can always retrieve these RDF/XML files in the future by accessing the document URI (DocID) and get it from our RDF repository. These URIs are known to you only (you submitted the documents to Open Calais api1.opencalais.com).

Hope this helps.

Let us know if you have more questions.

Ofer