Alysson
It was briefly discussed on the dev list. The conclusion is that what you
are trying to do isn't supported as a pure command line task currently.
You will need to write code or use the Fuseki web server to achieve what
you want
Rob that
On 06/08/2018, 18:15, "Alysson Gomes" <alyssonas...@gmail.com> wrote:
Hi Rob!
Still about this problem of indexing, do you have some suggestion?
Em qui, 19 de jul de 2018 às 13:59, Alysson Gomes <
alyssonas...@gmail.com>
escreveu:
> I did, but as you told the sparql launched an exception:
> org.apache.jena.sparql.ARQException: Found two matches: var ?root ->
> http://localhost/jena_example/#text_dataset,
>
file:///home/alysson/Documents/PUC-Rio/TestJena/tdb-citation-data-en-fuseki-index/index.ttl#dataset
>
>
> Em qui, 19 de jul de 2018 às 13:13, Rob Vesse <rve...@dotnetrdf.org>
> escreveu:
>
>> No I can't, the documentation is doing the right thing. A text
dataset is
>> fundamentally a wrapper around another dataset so any text indexing
config
>> will always require at least two datasets in the configuration file.
>>
>> Did you try using the sparql tool instead as I suggested?
>>
>> Rob
>>
>> On 19/07/2018, 15:25, "Alysson Gomes" <alyssonas...@gmail.com>
wrote:
>>
>> Are do you can send an example of a configuration file with
only one
>> dataset that contains the index? Because I'm based me in the
examples
>> of
>> the documentation (is must similar to the configuration that I'm
>> using).
>>
>> Em qui, 19 de jul de 2018 às 10:04, Rob Vesse <
rve...@dotnetrdf.org>
>> escreveu:
>>
>> > Thanks, so your problem was as I suspected
>> >
>> > You use tdbquery which does not understand text indexes using
it as
>> you
>> > do. By using --loc you are only querying your base dataset,
this
>> does not
>> > include your text index so you don't get any results.
>> >
>> > I would try using the base sparql tool instead passing in your
>> > configuration file i.e.
>> >
>> > sparql --desc=index.ttl --query=queries.rq
>> >
>> > I am not 100% sure this will work because there are two
datasets
>> defined
>> > in your config file (the base dataset and the text indexed
dataset)
>> and I
>> > am not sure which one the sparql tool will pick by default
>> >
>> > Rob
>> >
>> >
>> >
>> >
>> > On 19/07/2018, 13:47, "Alysson Gomes" <
alyssonas...@gmail.com>
>> wrote:
>> >
>> > I'm using the file bin of the Jena:
>> > *tdbquery
>> >
>> --loc=/home/alysson/Documents/PUC-Rio/TestJena/tdb-citation-data-en
>> > --query=queries.rq*
>> >
>> > file *queries.rq*:
>> > *prefix text: <http://jena.apache.org/text#
>> > <http://jena.apache.org/text#>>select ?s ?owhere{ ?s
>> text:query(
>> > <http://dbpedia.org/property/first <
>> http://dbpedia.org/property/first
>> > >>
>> > "David") ; <http://dbpedia.org/property/first
>> > <http://dbpedia.org/property/first>> ?o}*
>> >
>> > Em qui, 19 de jul de 2018 às 05:56, Rob Vesse <
>> rve...@dotnetrdf.org>
>> > escreveu:
>> >
>> > > You still didn’t state how you execute the query, you
included
>> > commands
>> > > for creating the database and index but not the
command/code
>> that
>> > actually
>> > > makes the query
>> > >
>> > >
>> > >
>> > > Please show exactly how you are submitting your query
>> > >
>> > >
>> > >
>> > > Rob
>> > >
>> > >
>> > >
>> > > From: Alysson Gomes <alyssonas...@gmail.com>
>> > > Reply-To: <users@jena.apache.org>
>> > > Date: Wednesday, 18 July 2018 at 20:15
>> > > To: <users@jena.apache.org>
>> > > Subject: Re: Question about indexing in text search
>> > >
>> > >
>> > >
>> > > Are using the following commands:
>> > >
>> > >
>> > >
>> > > Loading dataset
>> > >
>> > > $JENAROOT/bin/tdbloader
>> > >
>> -loc=/home/alysson/Documents/PUC-Rio/TestJena/tdb2-citation-data-en
>> > > tdb_citation.ttl
>> > >
>> > >
>> > >
>> > > Create index:
>> > >
>> > > java -cp
>> > >
>> >
>>
/home/alysson/MEGA/Computação/ApacheJena/apache-jena-fuseki-3.8.0/fuseki-server.jar
>> > > jena.textindexer --desc=index.ttl
>> > >
>> > >
>> > >
>> > > While the command above is running appear the following
>> result:
>> > >
>> > >
>> > >
>> > > After the creation of the index, I execute the query:
>> > >
>> > >
>> > >
>> > > prefix text: <http://jena.apache.org/text#>
>> > >
>> > > select ?s ?o
>> > >
>> > > where{
>> > >
>> > > ?s text:query( <http://dbpedia.org/property/first>
>> "David") ;
>> > >
>> > > <http://dbpedia.org/property/first> ?o
>> > >
>> > > }
>> > >
>> > >
>> > >
>> > > These are all commands that I'm using.
>> > >
>> > >
>> > >
>> > > Em qua, 18 de jul de 2018 às 13:13, Rob Vesse <
>> rve...@dotnetrdf.org>
>> > > escreveu:
>> > >
>> > > There is nothing obviously wrong with your
configuration.
>> You still
>> > > haven’t shown the code that you are using with this
>> configuration to
>> > make
>> > > your query.
>> > >
>> > >
>> > >
>> > > My guess would be that perhaps your code is loading in
the
>> base
>> > dataset
>> > > without the indexing support i.e. you may be querying
the base
>> > dataset
>> > > rather than the text dataset, but without having seen
your
>> code
>> > that’s only
>> > > a guess.
>> > >
>> > >
>> > >
>> > > Rob
>> > >
>> > >
>> > >
>> > > From: Alysson Gomes <alyssonas...@gmail.com>
>> > > Reply-To: <users@jena.apache.org>
>> > > Date: Wednesday, 18 July 2018 at 14:55
>> > > To: <users@jena.apache.org>
>> > > Subject: Re: Question about indexing in text search
>> > >
>> > >
>> > >
>> > > Hi Rob!
>> > >
>> > > I attached the file with the code of the text index
(file
>> index.ttl)
>> > but
>> > > to facility it, follow the image:
>> > >
>> > >
>> > >
>> > > Error! Filename not specified.
>> > >
>> > > I'm using the same queries of the previous mail. Case
has
>> something
>> > wrong,
>> > > please indicate it some solution.
>> > >
>> > >
>> > >
>> > > Em qua, 18 de jul de 2018 às 10:12, Rob Vesse <
>> rve...@dotnetrdf.org>
>> > > escreveu:
>> > >
>> > > This is a misunderstanding, not a bug. Property
functions
>> use the
>> > SPARQL
>> > > collection syntax i.e. ( <
http://dbpedia.org/property/first>
>> > “David”) to
>> > > pass arguments to the function which is given as the
>> predicate, in
>> > this
>> > > case text:query. The rdf:first/rdf:rest you see in the
logs is
>> > simply the
>> > > expansion of that into triple patterns which later gets
>> extracted
>> > out into
>> > > the actual property function call. The fact that those
>> happen to be
>> > > similar to the property you’re are trying to search on
is
>> purely
>> > > coincidental.
>> > >
>> > >
>> > >
>> > > If your query is not working as expected then the actual
>> problem is
>> > > elsewhere, likely in the configuration of your text
index.
>> So you
>> > would
>> > > need to share that configuration and show how you
actually
>> execute
>> > your
>> > > query if you want further help with this.
>> > >
>> > >
>> > >
>> > > Regards,
>> > >
>> > >
>> > > Rob
>> > >
>> > >
>> > >
>> > > From: Alysson Gomes <alyssonas...@gmail.com>
>> > > Reply-To: <users@jena.apache.org>
>> > > Date: Wednesday, 18 July 2018 at 13:42
>> > > To: "users@jena.apache.org" <users@jena.apache.org>
>> > > Subject: Question about indexing in text search
>> > >
>> > > Hello, my name is Alysson, I am a master's student in
the
>> Pontifical
>> > > Catholic University of Rio de Janeiro and am having
problems
>> with the
>> > > indexing in text search.
>> > >
>> > > In the attach 1 contains the assembler that I'm using
for to
>> index
>> > the
>> > > triples that contain the predicate <
>> > http://dbpedia.org/property/first>.
>> > >
>> > > My goal is to reproduce the query [1] using an index,
but the
>> > problem is
>> > > that when I execute the query [2] the URI used by the
query
>> > processor is
>> > > different of the URI that I am using in the predicate,
as
>> show image
>> > below:
>> > >
>> > >
>> > > Error! Filename not specified.
>> > >
>> > > As show in the image above, the query processor uses
the URI <
>> > > http://www.w3.org/1999/02/22-rdf-syntax-ns> generating
a
>> result
>> > > incorrect.
>> > >
>> > > I want to know if it is possible to change this or if I
am
>> doing some
>> > > wrong.
>> > >
>> > > Since I thank you for the help.
>> > >
>> > >
>> > >
>> > >
>> > >
>> > > [1]: Query
>> > >
>> > > SELECT ?s ?o
>> > >
>> > > WHERE {
>> > >
>> > > ?s <http://dbpedia.org/property/first> ?o
>> > >
>> > > filter regex(?o, "David", "i")
>> > >
>> > > }
>> > >
>> > >
>> > >
>> > > [2]: Query
>> > >
>> > > PREFIX text: <http://jena.apache.org/text#>
>> > >
>> > > SELECT ?s ?o
>> > >
>> > > WHERE {
>> > >
>> > > ?s text:query( <http://dbpedia.org/property/first>
"David") ;
>> > >
>> > > <http://dbpedia.org/property/first> ?o
>> > >
>> > > }
>> > >
>> > >
>> >
>> >
>> >
>> >
>> >
>> >
>>
>>
>>
>>
>>
>>
