Re: SPARQL and Object Property

Dear Mr Brice

I am sorry for the delay answer
I should say thank you to you
all is work now...
thank you very much for your help.

Warm Regards
Lina

On Tue, Jun 5, 2012 at 9:25 AM, Brice Sommacal <[email protected]>wrote:

> Hello Lina,
>
> If you want to make a filter on a datatype property, you need to make a
> reference on it in your sparql query before filtering.
> in your last example, ?FOOD is not referencing a string value, but rather
> a resource.
>
> For example,
>
> SELECT ?People ?Food
>         WHERE { ?People :hasdailymenu ?Food.
> ?Food :name ?value.
>                        FILTER(?value ='CHICKEN')
>    }
>
> BR,
>
>
> BRice
>
> 2012/6/4 jayadianti herlina <[email protected]>
>
>> Dear Mr Brice
>>
>> Thank you very much Brice
>> Its work thank you,..now I want to make a filter for that, like Filter in
>> *"Dataproperty"*
>> but now in *"Objectpeoperty"* can you give me a suggestion to do that. I
>> have no problem in DataProperty
>> I want to make a filter for instance in other classes..but the result is
>> lexical error.
>> as an example. I can't write..
>> FILTER (?Food="CHICKEN") --> lexical error.
>>
>> Thank you
>> Regards
>> Lina
>>
>>
>> On Mon, Jun 4, 2012 at 1:35 PM, Brice Sommacal <[email protected]>wrote:
>>
>>> Hello,
>>>
>>> owl:onProperty is used to make restriction.
>>> If you want to retrieve all people and food which are "connected" with
>>> the predicat :hasDailyMenu, you should request like the following:
>>>
>>> SELECT ?People ?Food
>>>         WHERE { ?People :hasdailymenu ?Food.
>>>                                  }
>>>
>>> Regards ,
>>>
>>>
>>> Brice
>>>
>>> 2012/6/1 jayadianti herlina <[email protected]>
>>>
>>>> Hi expert
>>>>
>>>> I need your help.
>>>> I have a problem in connection between classes and object properties.
>>>> I create 2 classes "People" and "Food"
>>>> and an object property "hasdailymenu".
>>>> its work perfectly in DL but I still have a difficulties in SPARQL.
>>>>
>>>> PREFIX rdf: <http://www.semanticweb.org/CO.owl#>
>>>> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
>>>> PREFIX owl: <http://www.w3.org/2002/07/owl#>
>>>> PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
>>>> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
>>>> SELECT ?People ?Food
>>>>         WHERE { ?People owl:onProperty :hasdailymenu.
>>>>                                  ....}
>>>>
>>>> help me.
>>>>
>>>> Sincerely
>>>> Lina
>>>>
>>>>
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