Now that core is much smaller than it used to be and also explicitly decoupled from everything else, the tagging scheme has changed and may be confusing. Here's a forum response to an email question:
<blockquote> When we release a .LRN release, does the OpenACS code get tagged with
the .LRN release as well or are the two separate tagging systems totally
independent?
</blockquote>
Answer: they are seperate.
Example:
January 1, 2000
OpenACS is at version 5.0.2. .LRN is at version 2.0.0, which is
compatible with OpenACS 5.0.
Then every file in OpenACS core, 5.0 branch has these tags:
openacs-5-0-2-final
openacs-5-0-compat
The same files on HEAD have no tags.
And every file in .LRN has these tags:
dotlrn-2-0-0-final
openacs-5-0-compat
Example 2: April 2000
OpenACS is at version 5.0.4, and version 5.1.0 is also out. .LRN is
at version 2.0.3, which is compatible with both.
Then every file in OpenACS core, 5.0 branch has:
openacs-5-0-4-final
openacs-5-0-compat
Every file in OpenACS core, 5.1 branch has:
openacs-5-1-0-final
openacs-5-0-compat
Every file in OpenACS core HEAD has:
no special tags
Every file in .LRN has:
dotlrn-2-0-3-final
openacs-5-0-compat
openacs-5-1-compat
Every other package works the same way as dotlrn.
Example 3:
Photo album 7.0 is compatible with OpenACS 5.1 but not 5.0. Every
file in photo-album has these tags:
photo-album-7-0-0-final
openacs-5-1-compat
Note that OpenACS and .LRN have major-minor-dot versions. However, dot releases are never supposed to threaten compatibility, so compat tags have only major-minor.
Note also that install/upgrade-from-repository sees only packages that are tagged with the compat flag matching the kernel version. So a 5.0 site will only see packages tagged openacs-5-0-compat.