Hi Mariano,
I don't have answers for everything, but here goes my 2c. (split by subject)
MAPPING GUIDE
is there any policy for creating DBpedia classes or properties?. For
> example, we missed the class BullFighter, we checked there was no
> othersimilar class, and we created it.
The only guidelines I know are specified here:
http://mappings.dbpedia.org/index.php/Mapping_Guide
How do we delete an erroneous mapping?
Using the delete tab on the wiki (delete page)
If we consider that it is necessary a given property (e.g., debutDate) in
> the DBpedia ontology, but that property was deleted (we can see this in
> the page history), what do we have to do?.
>
See if there is a duplicate. That might be the reason for the deletion. You
should then use the one that remained. Otherwise, discuss in the list and
the discussion page of that property.
Eg: In the statistics of (es) Ficha_de_futbolista we can find the property
> "altura" as one of the most used, but that property is not in the infobox
> definition. In the infobox definition we can see "estatura" (a concept
> similar to "altura") but is much less used that "altura". Do we have a
> mechanism to map both infobox properties to the same DBpedia property?
Yes.
We tried creating two mappings, one for "altura" and another for
> "estatura",
Exactly.
> Some wikipedia pages have infobox instances with properties that are not
> in the infobox definition. May be those properties have been deleted from
> the definition, producing an inconsistency (e.g. (es) Partidos and
> Ficha_de_montaña). Any recommendation?
>
What do you mean by inconsistency? Why is it a problem?
Can we map an infobox to 2 DBpedia classes if both classes are equivalent?
> E.g.: Organization and Organisation classes exist in DBpedia.
>
We should not have both classes. That is a bug in the ontology and should
be fixed.
Some properties seem to exist in DBpedia, but when we use them in the
> mappings are considered nonexistent (are rendered in red). E.g: in (es)
> Ficha_de_Tenista<http://mappings.dbpedia.org/index.php/Mapping_es:Ficha_de_tenista>we
> tried to use the DBpedia property
> "turnedpro" (in theory existing, as can be seen at
> http://dbpedia.org/property/turnedpro) theory existing, as can be seen at
> http://dbpedia.org/property/turnedpro). When we try to use that property
> in our mapping we get "When we try to use that property in our mapping we
> get "Couldn't load property mapping on page en:Mapping es:Ficha detenista.
> Details: Ontology property turnedpro not found". As
> well we tried with dbpprop:turnedpro, getting the same result.
This is probably a confusion between infobox property and DBpedia property.
The dbprop (http://dbpedia.org/property) namespace should be read as
"infobox property", while the http://dbpedia.org/ontology namespace is the
one that contains the DBpedia properties. You can only map infobox
properties to DBpedia Ontology properties.
I have a february version of a document entitled "DBpedia mapping
> language", do you have an actualized version? I found some typos and it
> does not cover conditional mappings.
I' m also not sure, but there seems to be a new one. You can check directly
in the repository.
http://dbpedia.hg.sourceforge.net/hgweb/dbpedia/extraction_framework/file/cefae9797133/core/doc/mapping_language
Folks, anybody else can chip in?
Cheers,
Pablo
--
Pablo N. Mendes
Research Associate
Web Based Systems Group
Freie Universität Berlinhttp://wbsg.de
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