Re: DBLP Sparql Endpoint

uhm weird,  I've tried then also:

SELECT DISTINCT *
WHERE {
?a a foaf:Agent .
?a foaf:name ?n .
FILTER (regex(str(?n), '^T', 'i'))
}
LIMIT 10

we are probavbly missing something here...



2014-04-04 14:51 GMT+02:00 Wetz Peter <peter.wetz@tuwien.ac.at>:

>  hm, yes. it’s really strange, because the following query proves that i
> can get authors with names, that do not start with an ‘A’:
>
>
>
> SELECT DISTINCT * WHERE {
>
> ?a a foaf:Agent .
>
> ?a foaf:name ?n .
>
> FILTER (?n = "Tuan-Dat Trinh")
>
> }
>
> LIMIT 10
>
>
>
> so the store seems to be complete, but i can not lookup these names via
> REGEX.
>
>
>
> *Von:* Alfredo Serafini [mailto:seralf@gmail.com]
> *Gesendet:* Freitag, 04. April 2014 14:35
>
> *An:* Wetz Peter
> *Cc:* public-lod@w3.org
> *Betreff:* Re: DBLP Sparql Endpoint
>
>
>
> uhm, maybe some configuration limit on the server?
>
>
>
> SELECT COUNT(?a)
>
> WHERE {
>
> ?a a foaf:Agent .
>
> ?a foaf:name ?n .
>
> }
>
>
>
> returns 10000
>
>
>
> 2014-04-04 14:31 GMT+02:00 Wetz Peter <peter.wetz@tuwien.ac.at>:
>
> Hm, yes, but if I increase the LIMIT, I still only get results of people
> starting with ‘A’. I think there’s something wrong with the Endpoint,
> because it only provides authors whose names start with an ‘A’.
>
>
>
> Try the following query, which returns all names starting not (!) with an
> ‘A’, which confirms my hypothesis of only names starting with an ‘A’ (+ two
> names starting with a paranthesis):
>
>
>
> SELECT DISTINCT * WHERE {
>
> ?a a foaf:Agent .
>
> ?a foaf:name ?n FILTER(!regex(str(?n),'^A','i')).
>
> }
>
> ORDER BY DESC(?n)
>
> LIMIT 5000
>
>
>
> I don’t know why the data of this endpoint seems to be incomplete. It’s a
> pity, because it makes the whole endpoint useless.
>
>
>
> Maybe some of you know SPARQL-Endpoints for papers/publications, besides
> this one and Rkbexplorer? Rkbexplorer has its own URI for each author of
> each paper, so there are a lot of duplicates, which is not useful for my
> case.
>
>
>
> Best regards and thanks for your advice,
>
> Peter
>
>
>
>
>
>
>
>
>
> *Von:* Alfredo Serafini [mailto:seralf@gmail.com]
> *Gesendet:* Freitag, 04. April 2014 11:34
> *An:* Wetz Peter
> *Cc:* public-lod@w3.org
> *Betreff:* Re: DBLP Sparql Endpoint
>
>
>
> Hi for me seems to work, for example using instead:
>
>
>
> SELECT DISTINCT * WHERE {
>
> ?a a foaf:Agent .
>
> ?a foaf:name ?n .
>
> FILTER  regex(?n, '^(.+\\s+)*b', 'i')
>
> }
>
> LIMIT 10
>
>
>
> I obtain as the first threee results the following ones:
>
> "(Zhou) Bryan Bai"
>
> "A-Reum Bae"
>
> "A. A. (Louis) Beex"
>
>
>
> If you want to work with surname the problem is related to the fact that
> all the data (name, surname) are in the foaf:name field, so that the only
> way seems to use a more specific regex, for example excluding the first
> part which can be something like "A. ", "B. A." or similar...
>
>
>
>
>
>
>
> 2014-04-04 10:11 GMT+02:00 Wetz Peter <peter.wetz@tuwien.ac.at>:
>
> Dear all!
>
>
>
> I would like to use the DBLP Sparql Endpoint at [1] to retrieve
> publications of authors by REGEX Search. This, however, seems not to work
> as expected.
>
>
>
> This query returns authors starting with an “A”:
>
> SELECT DISTINCT * WHERE {
>
> ?a a foaf:Agent .
>
> ?a foaf:name ?n .
>
> FILTER  regex(?n, '^a', 'i')
>
> }
>
> LIMIT 10
>
>
>
> This query should return authors starting with a “B”:
>
>
>
> SELECT DISTINCT * WHERE {
>
> ?a a foaf:Agent .
>
> ?a foaf:name ?n .
>
> FILTER  regex(?n, '^b', 'i')
>
> }
>
> LIMIT 10
>
>
>
> This does not return any results, and I don’t know why. Actually, it’s not
> working with any other letter except “A”. What I simply want to do is, to
> search for authos based on an input string.
>
>
>
> Maybe, somone of you can help.
>
>
>
> Thanks in advance,
>
> Peter
>
>
>
> [1] http://dblp.l3s.de/d2r/snorql/
>
>
>
>
>