The docs here say "Full statement is represented as separate node, with prefix wds:" however a TTL dump shows no "wds:" but only "s:" - So should this documentation be changed? Thanks.
Topic on Talk:Wikibase/Indexing/RDF Dump Format
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In the query service it seems only the wds: is defined.
https://query.wikidata.org/#select%20%23%28str%28s%3A%29%20as%20%3Fs%29%20%0A%20%20%20%20%20%20%20%28str%28wds%3A%29%20as%20%3Fwds%29%20%0A%7B%7D%20 works fine, but decomenting the first line in the query leads to an error because it’s undefined :
select (str(s:) as ?s)
(str(wds:) as ?wds)
{ }