Filters the URL base for taxonomies.

Adds a new feed type like /atom1/.

Adds a permalink structure.

Adds an endpoint, like /trackback/.

Adds a rewrite rule that transforms a URL structure to a set of query vars.

Adds a new rewrite tag (like %postname%).

Removes rewrite rules and then recreate rewrite rules.

Removes a permalink structure.

Removes an existing rewrite tag (like %postname%).

Examines a URL and try to determine the post ID it represents.