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Posted to users@jena.apache.org by Martynas Jusevicius <ma...@gmail.com> on 2011/09/26 14:05:16 UTC

list:member with GRAPH

Hey list,

we've been using the default graph for our data but now moved to named graphs.
I wrapped our queries in GRAPH where necessary and most of them work fine.
However a query containing GRAPH and list:member function doesn't. If
I include a pattern containing list:member like this

GRAPH ?graph
{
  # more patterns
  ?list list:member ?member
}

I get no matches, even though I clearly see that both the list and the
members are in the same graph and I can access them using rdf:first.
Are there any known issues in this area or some catches I should be aware of?

Thanks,

Martynas
semantic-web.dk

Re: list:member with GRAPH

Posted by Andy Seaborne <an...@apache.org>.
On 27/09/11 11:17, Martynas Jusevicius wrote:
> Yes, Fuseki 0.2.0 + TDB 0.8.10 I think.

Teh bug was in converting to quad patterns.

There's a fix now in ARQ SVN which will be in the next development build.

	Andy

>
> On Tue, Sep 27, 2011 at 12:16 PM, Andy Seaborne<an...@apache.org>  wrote:
>> On 26/09/11 13:05, Martynas Jusevicius wrote:
>>>
>>> Hey list,
>>>
>>> we've been using the default graph for our data but now moved to named
>>> graphs.
>>> I wrapped our queries in GRAPH where necessary and most of them work fine.
>>> However a query containing GRAPH and list:member function doesn't. If
>>> I include a pattern containing list:member like this
>>>
>>> GRAPH ?graph
>>> {
>>>    # more patterns
>>>    ?list list:member ?member
>>> }
>>>
>>> I get no matches, even though I clearly see that both the list and the
>>> members are in the same graph and I can access them using rdf:first.
>>> Are there any known issues in this area or some catches I should be aware
>>> of?
>>
>> Would I be right in guessing you are using SDB or TDB?
>>
>>         Andy
>>
>>> Thanks,
>>>
>>> Martynas
>>> semantic-web.dk
>>
>>

Re: list:member with GRAPH

Posted by Martynas Jusevicius <ma...@gmail.com>.
Yes, Fuseki 0.2.0 + TDB 0.8.10 I think.

On Tue, Sep 27, 2011 at 12:16 PM, Andy Seaborne <an...@apache.org> wrote:
> On 26/09/11 13:05, Martynas Jusevicius wrote:
>>
>> Hey list,
>>
>> we've been using the default graph for our data but now moved to named
>> graphs.
>> I wrapped our queries in GRAPH where necessary and most of them work fine.
>> However a query containing GRAPH and list:member function doesn't. If
>> I include a pattern containing list:member like this
>>
>> GRAPH ?graph
>> {
>>   # more patterns
>>   ?list list:member ?member
>> }
>>
>> I get no matches, even though I clearly see that both the list and the
>> members are in the same graph and I can access them using rdf:first.
>> Are there any known issues in this area or some catches I should be aware
>> of?
>
> Would I be right in guessing you are using SDB or TDB?
>
>        Andy
>
>> Thanks,
>>
>> Martynas
>> semantic-web.dk
>
>

Re: list:member with GRAPH

Posted by Andy Seaborne <an...@apache.org>.
On 26/09/11 13:05, Martynas Jusevicius wrote:
> Hey list,
>
> we've been using the default graph for our data but now moved to named graphs.
> I wrapped our queries in GRAPH where necessary and most of them work fine.
> However a query containing GRAPH and list:member function doesn't. If
> I include a pattern containing list:member like this
>
> GRAPH ?graph
> {
>    # more patterns
>    ?list list:member ?member
> }
>
> I get no matches, even though I clearly see that both the list and the
> members are in the same graph and I can access them using rdf:first.
> Are there any known issues in this area or some catches I should be aware of?

Would I be right in guessing you are using SDB or TDB?

	Andy

> Thanks,
>
> Martynas
> semantic-web.dk