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glossary: update description of "tag"

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It is an unimportant implementation detail that ref namespaces are
implemented as subdirectories of $GIT_DIR/refs. What is more important
is that tags are in refs/tags hierarchy in the ref namespace.

Also note that a tag can point at an object of arbitrary type, not limited
to commit.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2011-06-23 09:38:48 -07:00
parent 0abcfbff4d
commit 487b04411d
1 changed files with 8 additions and 8 deletions
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16
Documentation/glossary-content.txt
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@ -427,14 +427,14 @@ including Documentation/chapter_1/figure_1.jpg.
command.
[[def_tag]]tag::
A <<def_ref,ref>> pointing to a <<def_tag_object,tag>> or
<<def_commit_object,commit object>>. In contrast to a <<def_head,head>>,
a tag is not changed by a <<def_commit,commit>>. Tags (not
<<def_tag_object,tag objects>>) are stored in `$GIT_DIR/refs/tags/`. A
git tag has nothing to do with a Lisp tag (which would be
called an <<def_object_type,object type>> in git's context). A
tag is most typically used to mark a particular point in the
commit ancestry <<def_chain,chain>>.
A <<def_ref,ref>> under `refs/tags/` namespace that points to an
object of an arbitrary type (typically a tag points to either a
<<def_tag_object,tag>> or a <<def_commit_object,commit object>>).
In contrast to a <<def_head,head>>, a tag is not updated by
the `commit` command. A git tag has nothing to do with a Lisp
tag (which would be called an <<def_object_type,object type>>
in git's context). A tag is most typically used to mark a particular
point in the commit ancestry <<def_chain,chain>>.
[[def_tag_object]]tag object::
An <<def_object,object>> containing a <<def_ref,ref>> pointing to