doc/todo/matching_different_kinds_of_links.mdwn



[[!tag wishlist]]
As noted in [[todo/tag_pagespec_function]], there is a "misbehavior" of a tagged() pagespec: it matches even pages which have plain links to the tag page.
And in general, it would be quite useful to be able to distinguish different kinds of links: one more kind, in addition to "tag", is "bug dependency" noted in [[todo/structured_page_data#another_kind_of_links]] and [[todo/tracking_bugs_with_dependencies#another_kind_of_links]].
It could distinguish the links by the rel= attribute. ([[Tags already receive a special rel-class|todo/rel_attribute_for_links]].) This means there is a general need for a syntax to specify user-defined rel-classes on wikilink (then bug deps would simply use their special rel-class, either directly, or through a special directive like \[[!depends ]]), and to refer to them in pagespecs (in forward and backward direction).
Besides pagespecs, the rel= attribute could be used for styles. --Ivan Z.