I find tagging cumbersome, even after multiple forays into how it's done by others. Indexing software, akin to those programs used in publishing to create an index for a text, would be fab! Even better than "indexing" [read "tagging"] by occurrence, a facility that also enabled manual editing to add/delete/modify said tags would be so welcome! Maybe it's in place and I just don't know where to find it?!