Path between entities

[orenpapers]

Hello,
Is it possible to get hiererchical path distance between entities?

For example,
Madrid -> Cities in spain -> Barcelon (distance = 1)
Madria -> Cities in spain -> Cities in europe -> Rome (distance = 2)

Thanks

[hopple]

Yes, for such taxonomical relation, you need to use Sematch to load Wikipedia category taxonomy.

[orenpapers]

Do you mean like here in DBpedia Entity Similarity / DBpedia Concept Similarity?
http://gsi-upm.github.io/sematch/similarity/
I tried it but I have some problems:

1. How can I see the path for a given entity/concept?
2. What is the difference between entity and concept?
3. How can I get the entity of a given word? for concept I can use: concept.name2concept(), but there is no such a function for entity.name2entitiy()?

Thanks!

[hopple]

In sematch/semantic/sparql.py you can find a class called NameSPARQL, there you can find name2entities, which is simply implemented based on exact string matching to entity names.

Regarding to your question 1, what I mean is you need to load the corresponding Wikipedia category taxonomy in DBpedia, which you need to download from DBpedia dataset. Then you can use sematch/semantic/graph.py to load the taxonomy data, and then use similarity interface.