- From: Alfredo Serafini <seralf@gmail.com>
- Date: 2015年1月22日 15:23:19 +0100
- To: Juan Sequeda <juanfederico@gmail.com>
- Cc: Semantic Web <semantic-web@w3.org>, public-lod public <public-lod@w3.org>
- Message-ID: <CADawF4Ond9Sjv57K09FhyAqrZ_QRtzTLVhf8saphbR2-HWCwFw@mail.gmail.com>
Hi
the most basic query is the usual query for concepts, something like:
SELECT DISTINCT ?concept
WHERE {
?uri a ?concept.
}
then, given a specific concept, you can infer from the data what are the
predicates/properties for it:
SELECT DISTINCT ?prp
WHERE {
[] ?prp <a-concept>.
}
and so on...
Apart from other more complex query (here we are of course omitting a lot
of important things), these two "patterns" are usually the most useful as a
starting point, for me.
2015年01月22日 15:09 GMT+01:00 Juan Sequeda <juanfederico@gmail.com>:
> Assume you are given a URL for a SPARQL endpoint. You have no idea what
> data is being exposed.
>
> What do you do to explore that endpoint? What queries do you write?
>
> Juan Sequeda
> +1-575-SEQ-UEDA
> www.juansequeda.com
>
Received on Thursday, 22 January 2015 14:23:48 UTC