----- "Bob DuCharme" <[EMAIL PROTECTED]> wrote:
Has anyone managed to pass a URL with a SPARQL query to wget or curl
and successfully retrieved data from dbpedia?
> Peter Ansell wrote:
You need to URLEncode the SPARQL query. I am not sure how to do that with a
command-line or wget but that is what the browser has done to the query when it
submitted the form using HTTP GET.
I had tried several variations on that. (First I realized that [2] in my
original email had the wrong URL; it should have said the following,
without carriage returns:)
wget -O temp.txt http://DBpedia.org/sparql?query="PREFIX
db:<http://dbpedia.org/property/> SELECT * WHERE { ?city db:leaderName
?leader ; db:subdivisionName ?subdiv ; db:elevation ?elevation . } LIMIT 5"
Using the very handy escape/unescape page at
http://www.xs4all.nl/~jlpoutre/BoT/Javascript/Utils/endecode.html, I
made this escaped version
wget -O temp.txt
http://DBpedia.org/sparql?query%3D%22PREFIX%20db%3A%3Chttp%3A%2F%2Fdbpedia.org%2Fproperty%2F%3E%20SELECT%20*%20WHERE%20%7B%20%3Fcity%20db%3AleaderName%20%3Fleader%20%3B%20db%3AsubdivisionName%20%3Fsubdiv%20%3B%20db%3Aelevation%20%3Felevation%20.%20%7D%20LIMIT%205%22
and when trying to run it I just get error messages whether I quoted the
URL, put the line in a batch file and tried it from there... (At least
the unescaped version gave me well-formed XML as a response, even if the
result set was empty.)
After trying several more combinations of escaped vs. unescaped, wget
vs. curl, quoting vs. not quoting, Windows vs. Linux, and using the
command directly from the command line vs. putting it in a batch file or
shell script and calling that, I just got it to work calling the
unescaped version with wget from a shell script on a Linux box.
I'd still like to hear about any luck others might have had.
Bob
