I'm not sure what you're trying to achieve here, but I don't believe this is what you want - Why have you created a tag to a branch you've just created, including the whole of the phase3 and the extensions?
The more sane way, would be creating a MoodBar folder at /tags/extensions/MoodBar, then tagging the current version as REL0_1 in there
We don't want to commit the changes to trunk yet for MoodBar phase 2 changes, that's why we ends up creating a new branch. I followed the steps in here: http://www.mediawiki.org/wiki/Subversion/branching_guide. I think what you suggest is more efficient and I will delete this branch.
Thanks,
this obsolete branch/tag was deleted already