> There ain't very many out there yet. Indeed.
> 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)
