Re: [dotNetRDF-Develop] Building SPARQL programmatically

[Tomasz P. <tom...@gm...>]

Hello again

I tried to build some algebra programmatically but I failed miserably :)

Could you please as an example help me with expressing the below
SPARQL in Algebra API?

SELECT ?item
{
  OPTIONAL { ?item a  ex:someClass . }
  OPTIONAL { ?item a  ex:someOtherClass . }
  ?item foaf:name ?itemName
  FILTER( langMatches( lang(?itemName), "en" ))
}

This should give me enough insight to get up to speed with the API.

Thanks,
Tom

On Sat, Sep 22, 2012 at 7:02 PM, Tomasz Pluskiewicz
<tom...@gm...> wrote:
> Also are there any introductory examples on creating SPARQL Algebra.
> It could be the way to go for my initially. Are there many scenarios
> when it would be impossible to convert it to a query?
>
> Tom
>
> On Sat, Sep 22, 2012 at 11:30 AM, Tomasz Pluskiewicz
> <tom...@gm...> wrote:
>> Thanks Rob
>>
>> I could look into it. Please point me int the right direction in the
>> code where the internal API is located.
>>
>> Tom
>>
>> On Fri, Sep 21, 2012 at 10:26 PM, Rob Vesse <rv...@do...> wrote:
>>> Hey Tom
>>>
>>> Right now it's somewhat limited, you can build the algebra
>>> programmatically and try and convert it back to a query with the AsQuery()
>>> method but that isn't guaranteed to work (some algebras can't be converted
>>> back into queries).  Otherwise you have to generate a string and then
>>> parse it.
>>>
>>> Most of the SparqlQuery API is protected internal/private, I have a To Do
>>> item to add a public fluent style API for building queries that I will
>>> likely do for the next release if that helps.  I/you can start building
>>> that out in a feature branch if that would solve your issue?
>>>
>>> Rob
>>>
>>> On 9/21/12 11:39 AM, "Tomasz Pluskiewicz" <tom...@gm...>
>>> wrote:
>>>
>>>>Hi
>>>>
>>>>Please tell me what are the options for building SPARQL
>>>>programatically with dotNetRDF? Is there any such API?
>>>>
>>>>Regards,
>>>>Tom
>>>>
>>>>--------------------------------------------------------------------------
>>>>----
>>>>Got visibility?
>>>>Most devs has no idea what their production app looks like.
>>>>Find out how fast your code is with AppDynamics Lite.
>>>>http://ad.doubleclick.net/clk;262219671;13503038;y?
>>>>http://info.appdynamics.com/FreeJavaPerformanceDownload.html
>>>>_______________________________________________
>>>>dotNetRDF-develop mailing list
>>>>dot...@li...
>>>>https://lists.sourceforge.net/lists/listinfo/dotnetrdf-develop
>>>
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Got visibility?
>>> Most devs has no idea what their production app looks like.
>>> Find out how fast your code is with AppDynamics Lite.
>>> http://ad.doubleclick.net/clk;262219671;13503038;y?
>>> http://info.appdynamics.com/FreeJavaPerformanceDownload.html
>>> _______________________________________________
>>> dotNetRDF-develop mailing list
>>> dot...@li...
>>> https://lists.sourceforge.net/lists/listinfo/dotnetrdf-develop