Retrieving all TGN codes for a region

[Charles Blair]

I'm curious how to get a list of all the codes for North and Central America, which is listed as a discrete region in the TGN hierarchy. One such would be the following:

http://vocab.getty.edu/tgn/7432893

[Vladimir Alexiev]

That's easy, see http://vocab.getty.edu/queries#Descendants_of_a_Given_Parent and adapt for TGN.

Here are 100 such places, together with their parent string.

select * {
  ?x gvp:broaderExtended tgn:1000001; skos:inScheme tgn: ;
     gvp:prefLabelGVP/xl:literalForm ?l;
     gvp:parentString ?parents
} limit 100

However, there are too many:

select (count(*) as ?c) {
  ?x gvp:broaderExtended tgn:1000001; skos:inScheme tgn:
} # 854831

and includes pacific islands because

> Within the logic of TGN, "North and Central America" is a continent, to which all nations in this area of the world are linked. It comprises lands on the North American and Caribbean plates. 

So you better narrow your search somehow.

[Vladimir Alexiev]

I wondered why Northern Islands (part of Oceania) were listed under North and Central America. Turns out that's because the Mariana Islands has a secondary parent, the US:

Now I wonder why NAFTA is listed under Earth (as opposed to World).

Earth has just 3 children: NAFTA, EEA and the Moon.

That seems weird.

[Getty Vocabularies LOD]

The Vocabulary program is aware of this data issue, and it will be fixed in the next publish in early August.

Gregg Garcia

Software Architect

Getty Digital / J. Paul Getty Trust