[Nepomuk] Strange behavior of data extraction

[Ignacio Serantes]

I don't have here my pc but seems like you need to split the optional
clause because you are obtaining a result only when all ontologies exists.

El viernes, 7 de septiembre de 2012, Aleix Pol escribió:

> Hi,
> Recently I've been trying to push KPeople into something that we can
> actually use. There's been good progress so far, but recently I've hit
> an issue I don't really understand, maybe somebody can bring some
> light to it for me because I don't understand it.
>
> The problem is that while making the query, I ask for many
> information, including the nco:hasIMAccount field. In this video [1]
> I'm showing how the returned field is empty but if I navigate to the
> contact using the nepomuk shell, then I can see the hasIMAccount
> information.
>
> Can anybody tell me what is going wrong? Why don't I get the imAccount
> information in the query?
>
> Thanks!
> Aleix
>
> [1] http://proli.net/meu/kde/weirdnepomuk.ogv
>
> PS: Here's the query, if you want to try:
>
> select ?uri ?pimo_groundingOccurrence ?nco_hasIMAccount
>         ?nco_imNickname ?telepathy_statusType ?nco_imID
> ?nco_imAccountType ?nco_hasEmailAddress
>         ?nco_imStatus ?nco_photo
>
>         WHERE {
>             ?uri a nco:PersonContact .
>             ?pimo_groundingOccurrence   pimo:groundingOccurrence     ?uri .
>
>         OPTIONAL {
>             ?uri                       nco:hasIMAccount
> ?nco_hasIMAccount .
>             ?nco_hasIMAccount          nco:imNickname
> ?nco_imNickname .
>             ?nco_hasIMAccount          telepathy:statusType
> ?telepathy_statusType .
>             ?nco_hasIMAccount          nco:imStatus
> ?nco_imStatus .
>             ?nco_hasIMAccount          nco:imID
>  ?nco_imID .
>             ?nco_hasIMAccount          nco:imAccountType
> ?nco_imAccountType .
>          }
>         OPTIONAL {
>             ?uri                       nco:photo                   ?phRes.
>             ?phRes                     nie:url
> ?nco_photo.
>          }
>         OPTIONAL {
>             ?uri                       nco:hasEmailAddress
> ?nco_hasEmailAddress .
>             ?nco_hasEmailAddress       nco:emailAddress
> ?nco_emailAddress .
>          }
> }
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>


-- 
Best wishes,
Ignacio
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