Tags in Mercurial
Note: If you are migrating from ["CVS"], please [:CvsConcepts#tags read this discussion of CVS tags] before you continue.
A tag is a symbolic identifier for a ["ChangeSet"].
["Mercurial"] has two kinds of tag.
A local tag is a convenience identifier that is not revision controlled, does not propagate with other changes, and lives in the .hg/hgrc file in a repository.
A "regular" tag (with no special specifier) is revision controlled, does propagate with other changes, and lives in the .hgtags file in a repository.