[analog-help] searching for special file types or url

[Mazanke, Michael 3753 EXT SFA-5]

Hello,
how can I search special file types or a url? I didn't found anything in
documentation.
Is it possible to enter in the search field (from search.html) a string
which performs a search of special file types or urls?

With Verity a can search for PDF Documents with a string like this:
url <contains> pdf

How can I perform this search with ht://Dig?

Thank you
Michael
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