Hi Mandar :)
DBpedia does not handle nested templates. It may work for some specific 
(simple-enough) templates but it is in no way generalized.

That's why consumer-grade projects consuming Wikipedia data either:1) Scrape 
Wikipedia HTML pages directly: i.e. template interpretation is done by 
MediaWiki, on wikipedia.com or on dedicated Wikipedia mirrors.2) Set up their 
own Wikipedia extraction framework, which may interpret templates directly or 
delegate to MediaWiki using its API.
Nicolas.




 

     On Wednesday, February 18, 2015 10:56 AM, Mandar Rahurkar 
<rahur...@gmail.com> wrote:
   

 Thanks Guys for  your comments ! Release data information for April Love 
(film) is availablehttp://dbpedia.org/page/April_Love_(film)

but not for http://dbpedia.org/page/Actrius
And if you examine the wikipedia page, they both seem to use nested 
template:http://en.wikipedia.org/w/index.php?title=April_Love_(film)&action=edit

So maybe this is more than one issue?
thanks,Mandar



On Wed, Feb 18, 2015 at 9:22 AM, Alexandru Todor <to...@inf.fu-berlin.de> wrote:

Hi Vladimir, Mandar,
The mappings extractor can't handle nested templates: 
http://sourceforge.net/p/dbpedia/mailman/message/32867924/ .@Dimitris : I know 
this is on your to do list, any progress so far ?
Cheers,Alexandru
On Wed, Feb 18, 2015 at 5:49 PM, Vladimir Alexiev 
<vladimir.alex...@ontotext.com> wrote:

Hi Mandar!

Run these queries on http://yasgui.org/, selecting http://dbpedia.org/sparql as 
endpoint.

First check the raw property dbo:released:

PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX dbp: <http://dbpedia.org/property/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
select * {?x a dbo:Film; dbp:released ?rel
    filter exists {?x rdfs:label ?lab filter(strstarts(?lab,"Act"))}}
order by ?x limit 100

As you can see many movies have it, but not Actrius.
So Volha is right, the problem is that in that movie it's not a plain date.

> How were you able to extract that information?

It's in https://en.wikipedia.org/w/index.php?title=Actrius&action=edit:
   | release = {{Film date|1996|||}}

I tried to make a mapping: 
http://mappings.dbpedia.org/index.php/Mapping_en:Film_date
to extract release year and location (there can be several).

But it doesn't extract anything. Maybe templates INSIDE template fields are not 
used for extraction?
Issue: https://github.com/dbpedia/mappings-tracker/issues/46
Test cases: http://mappings.dbpedia.org/index.php/Mapping_en_talk:Film_date

If that's the case, we could map it to another date template here:
https://github.com/dbpedia/extraction-framework/blob/master/core/src/main/scala/org/dbpedia/extraction/config/dataparser/DateTimeParserConfig.scala#L97
But Volha, can it extract SEVERAL dates from one template?



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