I would like to create a DPL that lists all the templates in a category, along with the description listed inside their data block. Is this possible?
Topic on Extension talk:TemplateData
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What is a DPL?
Searching categories is possible with CirrusSearch, even recursively with the deepcat:
keyword. The TemplateData extension comes with its own action API called action=templatedata
. You have probably see the documentation. These APIs can be combined with the generator feature of the query API. We improved this particular feature just recently. I hope this helps.