I am sure I am missing something in your question. Look at the manifest.xml
files in the ODF specifications. None of them have manifest:full-path
values that begin with "." and the only one beginning with "/" is the
artificial one for the overall document that the package represents. (Zip
directory entries are forbidden to have names beginning with "/".)
I notice there is a tendency in some OpenDocument Producers to create
subdocuments for every possible full-path leading segment ending in "/" but
there is no requirement for that in the Package specification, especially
with manifest:media-type="". In fact, I believe such manifest:media-type
values do not conform to the MIME Type RFC and such