A TAGS file generator based on http://ctags.sourceforge.net/FORMAT. rdoc-tags handles namespaced classes and modules, ! and ? methods, constants and attributes better than Exuberant Ctags. rdoc-tags includes a Hoe plugin +:rdoc_tags+ making it easy to add tag support to your ruby project. If you don't use Hoe you can instead use RDoc::TagsTask to add rake tasks for building TAGS to your ruby project.