[Crm-sig] [Culturebrokers] SPARQL endpoints

Paul Cripps paul.cripps at southwales.ac.uk
Mon Oct 27 19:42:21 EET 2014

Hi all, 
Sorry for the lateness of this reply. Hope it is still of use.

The ADS endpoint indeed uses CRMEH but does also include CRM classes where these are used directly. See the results of the query Vladimir listed. 
Furthermore, in conjunction with the encodings in owl / rdf of the CRMEH (at http://purl.org/crmeh#) and CRM (Erlangen), it is possible to apply reasoning. 
For example, for a pilot study recently completed looking at geosemantics, I have a chunk of the ADS data plus the CRMEH and CRM in a triplestore, extended it using GeoSPARQL to add a spatial framework for geospatial data and it works a treat (using the inferencing rule engine in Parliament).
NB I will be looking at moving over to the official CRM namespace also. Currently using Erlangen as that was what was used for CRMEH. 

Hope this helps!
All best,

-----Original Message-----
From: Crm-sig [mailto:crm-sig-bounces at ics.forth.gr] On Behalf Of Vladimir Alexiev
Sent: 16 October 2014 10:36
To: crm-sig at ics.forth.gr
Subject: Re: [Crm-sig] [Culturebrokers] SPARQL endpoints

> There ain't very many out there yet.


> http://data.archaeologydataservice.ac.uk/page/

The endpoint is at http://data.archaeologydataservice.ac.uk/query.
That uses CRMEH, but doesn't seem to have reasoning nor any CRM classes. Check with:

select distinct * {[] a ?class}

> http://data.clarosnet.org/sparql/

This uses a very old namespace (I think that's the "bloodybyte" representation), e.g. http://purl.org/NET/crm-owl#E67_Birth.
It also doesn't have reasoning, e.g. although there are Births, there are no crm:E63_Beginning_of_Existence.
It has 401k objects:
 SELECT (count(*) as ?c) {
  ?obj crm:P2_has_type
    [crm:P127_has_broader_term <http://id.clarosnet.org/type/object>]}
And 19M triples:
SELECT (count(*) as ?c) {?s ?p ?o}

The British Museum collection http://collection.britishmuseum.org
has 2M objects represented in CRM with full reasoning, involving 916M triples

There's also the Polish Digital Library, http://dl.psnc.pl :
a national aggregation of museum and library objects using FRBRoo and CRM. 
3.1M objects involving 535M triples
Not sure where the endpoint is.

You can find some volumetric numbers (also comparing to FactForge and LinkedLifeData) here:
Large-Scale Reasoning with a Complex Cultural Heritage Ontology (CIDOC CRM) at http://www.ontotext.com/research-publications/?yr=2013
(paper and presentation)

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