CODEWITHSUNDEEP
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arassi
arassi

Reputation: 139

SPARQL: Finding the relation that connects two entities from a list of possible relations

I have two sets of entities, entities1 and entities2 and I want to identify all relations that link the two together, from a specified set of relations.

This can be done by declaring the relation as a variable:

?entities1 ?relations ?entities2

However, this iterates over all possible relations, therefore making the query incredibly slow and inefficient.

This could also be done by declaring the relations needed using a OR operator:

?entities1 (relation1 | relation2 | ... | relation_n) ?entities2

This finds all of the cases where entities 1 and 2 are linked by one of our relations but the relation is not returned, therefore it's not known which relation was correct.

I need a method of finding the relations between each entity from a specified set of relations that can then be returned as a table with the headers (entity1, entity2, relation).

Any ideas?

Upvotes: 1

Views: 167

Answers (1)

arassi
arassi

Reputation: 139

@UninformedUser kindly pointed out that a set of relations can be declared by using VALUES meaning that the desired effect can be achieved as follows:

VALUES ?relation {:relation1 :relation2 ... :relation_n} ?entities1 ?relation ?entities2 .

Thanks for your help!

Upvotes: 3

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