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LinkedDataFragments / Client.js

[DEPRECATED] A JavaScript client for Triple Pattern Fragments interfaces.
http://linkeddatafragments.org/
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Support `COUNT` queries (and aggregations in general) #13

Closed ali1k closed 4 years ago

ali1k commented 9 years ago

Hi there, I am trying to use the LDF client and listening to data event. As I understood I cannot send aggregate queries like 'Count' directly. I am looking for a solution to get the total number of triples from my query. I already see it in the debugger but cannot access the value! Could you please advise me how to get the total number of triples on client request?

p.s. I am adding support for LDF to http://ld-r.org

mielvds commented 9 years ago

@RubenVerborgh fyi, this count feature was also asked by @coreation for an in-house project.

RubenVerborgh commented 9 years ago

Hi Ali,

Basically, COUNT still needs to be implemented in the client, and this involves implementing aggregations. It's possible, we just haven't gotten round to it.

As @mielvds says, we also have internal incentives to do so, so this will be on the agenda in the near future.

Very intrigues by ld-r.org, great that you're adding LDF support. Keep us updated, and we'll list it at http://linkeddatafragments.org/data/.

Best,

Ruben

ali1k commented 9 years ago

thanks for your swift response. I am looking forward to see the support for aggregate functions on LDF-client. In the meantime, I will try to simply use the LDF server 'void:triples' with simple triple patterns.

RubenVerborgh commented 9 years ago

Great! Just note that void:triples might be approximate, so you might have to be careful.

rubensworks commented 4 years ago

This project has now been deprecated in favor of Comunica, where this feature is supported.