[sparql-wrapper-devel] Is it possible to order results from a CONSTRUCT query?

[Stefano V. <ste...@gm...>]

Hi everybody,
I am new to this mailing list so I hope this kind of questions is not OT.

I am experiencing an issue with a CONSTRUCT query using the SparqlWrapper:
I am collecting data from the Italian Parliament Sparql endpoint and I need
to fetch data about the laws discussed during one day and then write an
output file containing those data.

The construct query does all that but when I print the file the data is not
ordered by law code as I would want it to be.
If I try the same query on the Virtuoso panel the Parliament provides the
results match my needs but I run the same query with my python script the
output is correct but there is no order.

I already tried using ORDER BY instruction in my query but it didn't help.

The query is the following:
            PREFIX ocd: <http://dati.camera.it/ocd/>
            PREFIX dc: <http://purl.org/dc/elements/1.1/>
            PREFIX creator: <http://purl.org/dc/elements/1.1/creator>
            PREFIX persona: <http://dati.camera.it/ocd/persona>

            CONSTRUCT
            {
            ?atto a <http://dati.camera.it/ocd/atto>.
            ?atto dc:date ?date .
            ?atto dc:title ?title .

            ?atto ocd:primo_firmatario ?primo_firmatario.
            ?atto ocd:altro_firmatario ?altro_firmatario.
            ?atto ocd:rif_richiestaParere ?rif_richiestaParere.

            }
            WHERE
            {

            ?atto a <http://dati.camera.it/ocd/atto> .
            ?atto dc:date ?date .
            ?atto dc:title ?title .
            OPTIONAL{?atto ocd:primo_firmatario ?primo_firmatario.}
            OPTIONAL{?atto ocd:altro_firmatario ?altro_firmatario.}
            OPTIONAL{?atto ocd:rif_richiestaParere ?rif_richiestaParere.}

            FILTER(str(?date) = '20110117')
            }
            ORDER BY DESC(?atto)

And you can find all the code I am working on here (
https://github.com/verganis/parlamento_fetch), the script that I am using
is parlamento_fetch/c_atti.py
which runs like this
python parlamento_fetch/c_atti.py YYYYMMDD
*example:*
python parlamento_fetch/c_atti.py 20110111

Thanks in advance,


-------------------


Dott. Stefano Vergani

*IT Engineer | Web design | Developer*

*skype: verganis*

*Tel: 340.8604184*

*Mail: ste...@gm... *

<http://stefanovergani.vacau.com/>
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