How to see unanswered questions for a tag (or category) ?

Question

How can I see the list of unanswered questions for a speciafic tag or category ?

Comments

Currently this feature is not present in Q2A. Just a few days back I also asked for this feature which could be added in Stats page. Although there is no answer to that question but you can still see that question here.
http://www.question2answer.org/qa/48302

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I think that this is an extremely important feature ! I wonder why it is not yet implemented while the current version is 1.7.X

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This is there for category- we have to enable it in qa-config by enabling unindexed queries. After this category list displayed on "Unanswered" page works for categories.

But tags would be good addition.

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How do you enable this ? I dont find anythig related to this is qa-config file

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define('QA_ALLOW_UNINDEXED_QUERIES', true);