Coreferencing sources

[Vladimir Alexiev]

Robert Sanderson suggested: Library LoD folk … aka @cm_harlow … has anyone tried to reconcile Getty Vocab sources?
Eg http://vocab.getty.edu/aat/source/2000030811 to https://lccn.loc.gov/75331784

Christina Harlow has taken this up, and done some coreferencing. 

See this thread https://twitter.com/azaroth42/status/750478624692637696.

I think coreferencing sources is an excellent idea, and is important especially for all the importance that sourcing statements obtained on Wikidata in the last year.

Some notes on GVP sources (see http://vocab.getty.edu/doc/#Source):

• There are global (eg http://vocab.getty.edu/aat/source/2000030811) and local (eg http://vocab.getty.edu/aat/source/2000030811-subject-300021625). The latter has a bibo:locator, eg "147; Kütahya ware": it means that the specific entity this is a source for, is mentioned on p.147 in the source, I guess in the article "Kütahya ware". We want to match only global sources.
• AAT, TGN and ULAN have separate source lists, even though many of the sources are common. http://vocab.getty.edu/doc/queries/#Find_Sources_by_Vocabulary shows we can tell them apart using a named graph. Furthermore, the same filters out local sources.

This query shows the number:

select ?g (count(*) as ?c) {
  graph ?g {
    ?source a bibo:Document
}} group by ?g

http://vocab.getty.edu/dataset/aat	44927
http://vocab.getty.edu/dataset/tgn	3567
http://vocab.getty.edu/dataset/ulan	62741

I found some quality problems that I've raised with Getty: https://jira.getty.edu/browse/ITSLOD-477 (a closed Jira)