Hi, I am working with the SKOD categories file
http://wiki.dbpedia.org/Downloads351#categories(skos) to obtain a
hierarchy of Wikipedia categories, starting a t a specified category
(Proteins for example). However, I am finding that some categories are
children of each other.

For example, given the following triple

<http://dbpedia.org/resource/Category:Enzymes_by_function>
<http://www.w3.org/2004/02/skos/core#broader>
<http://dbpedia.org/resource/Category:Enzymes>

my understanding is that Enzymes is the parent of Enzymes_by_function.

However I also find the triple:

<http://dbpedia.org/resource/Category:Enzymes>
<http://www.w3.org/2004/02/skos/core#broader>
<http://dbpedia.org/resource/Category:Enzymes_by_function>

which states the reverse.

Is this by design?

Browsing Wikipedia categories at
http://en.wikipedia.org/w/index.php?title=Special:CategoryTree&target=Proteins&mode=categories&dotree=Show+tree
I see that Enzymes is the parent of Enzymes_by_function and not the
other way around. if that's the case, how did DBpedia derive the above
triples?

Thanks,

-- 
Rajarshi Guha
NIH Chemical Genomics Center

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