Hi Dan,
thanks for you answers. I found out that this behaviour has been
described before in
Bug 28078 - Cannot query for category pages in a specific category
in March 2011 [1].
The query that you proposed:
{{#ask: [[Subcategory of::+]] }}
correctly returns the list of all categories that are subcategories.
But when I extend the query to retrieve only the subcategories of a
certain category,
then the query does not return any results.
Best regards,
Basil
[1] https://bugzilla.wikimedia.org/show_bug.cgi?id=28078
Am 29.08.2011 15:27, schrieb Dan Bolser:
> On 22 August 2011 08:18, Basil Ell<[email protected]> wrote:
>> Hi,
>>
>> I am trying to query for the list of all subcategories of a given category,
>> but this does not return any results.
>>
>> I created a category C0
>> and two categories C0-0 and C0-1 with are annotated with [[Category:C0]].
>> When I browse their properties i see that they are "subcategory of" C0 -
>> seems to be alright.
>>
>> But neither this query
>> {{#ask: [[Subcategory of::C0]] | format=table}}
> What happens if you try: {{#ask: [[Subcategory of::+]] }} ?
>
>
>> or this query
>> {{#ask: [[:Category:+]] [[Subcategory of::C0]] | format=table}}
>> returns any result.
>>
>> What do I do wrong here?
>>
>> I am using MediaWiki 1.17alpha and Semantic MediaWiki (1.5.0.a-SVN).
>> $smwgQFeatures in SMW_Settings.php is set to SMW_PROPERTY_QUERY
>> | SMW_CATEGORY_QUERY | SMW_CONCEPT_QUERY | SMW_NAMESPACE_QUERY
>> | SMW_CONJUNCTION_QUERY | SMW_DISJUNCTION_QUERY;
>>
>> Best regards,
>> Basil
>>
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