Election nominations

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Chris Wallace

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Apr 30, 2010, 12:10:57 PM4/30/10
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I did a scrape of the Press Assocation's page of election nominations
to xml and then to RDF which is up in a (misnamed) datastore.

http://api.talis.com/stores/uk-twinning-dev1/services/sparql

I wrote up the exercise in my blog

http://kitwallace.posterous.com/tag/election

Performance on this dataset seemed very sluggish and I wondered if
there was anything in the RDF or the example queries to cause this.

Any comments on the RDF itself would be welcome - I know there is more
to be added to make this Linked data but I just wanted to get some
basic page-to-RDF XQuery tools tested.

Chris

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Chris Clarke

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Apr 30, 2010, 12:20:15 PM4/30/10
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Hi Chris, 

The queries run much, much faster if you take out the filter in your sparql queries and replace the bind variable with the literal you were previously filtering on, e.g.

select ?name ?party ?sitting 
where 
{  
?c rdf:type t:constituency.  
?c rdfs:label "BRISTOL WEST".  
?c p:nomination ?nom.  
?nom rdfs:label ?name.  
?nom p:party-name ?party.  
OPTIONAL {?nom p:sitting-MP ?sitting}  
} 

or 


...executes and returns in under a second on my browser.

Thanks,

Chris
Programme Manager
Education Division

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Chris Wallace

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Apr 30, 2010, 6:29:18 PM4/30/10
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Thanks Chris

Funny, that's how I usually write these queries - not sure what
prompted me to change to using Filters today.
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