lgedeon/Term-Term — pull request #1 by ericmann (2012-12-04 23:29:21+00:00)
Title: Implement a pre_get_posts filter function to return everything in associated tags/categories

When posts are retrieved, WordPress will retrieve all posts for the parent (and children) category to the requested category. See in-line documentation on `get_term_family()` for specifics.

**NOTE:** This still needs to be implemented for abstract taxonomies (not tags or categories).