specifying predicate filter

[Umutcan Şimşek]

Hi folks,

I newly started to use LDSpider got some results, but still have some problems. First of all I'm using Java API and I couldn't find a predicate filter. For example, I only want to visit owl:sameAs values, not all URI's in the RDF file. And I also wonder, if there is a possibility to filter extracted triples. For example, is there a way to prevent spider to extract wikipageredirects triples?

And much bigger problem is, spider doesn't stop! It probably starves after a point and it's waiting at idle state after starving.

Thanks in advance

Umutcan

[Jürgen Umbrich]

Hi, 

sorry for the late repsonse

The wiki pageo n the google project page should contain the necessary information to define a link filter in from of our hooks system (https://code.google.com/p/ldspider/wiki/Hooks).

You should use an 

LinkFilterPrefix Add only uris with matching prefix to queue.

rather than teh LinkFilterDefault. 

This shoudl ensure that you only follow owl:sameAs links.

Regarding filtering of extracted triples:

  1) download everything and filter afterwards

  2) Implement a SinkCallback which has the filter (we would even like to integrate such a class into the ldpsider code if you woudl share it)

Regarding the last problem. can you provide some information , what makes you think the program starves at idle state? 

Best

Umutcan

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