[sc34wg3] occurrence - basename fuzzy boarder

[Martin Bryan]

Bernard et al

Re (on the IRC chat line): the reason is that i've never really understood
the reason why basenames and occurrence have to be different.

The main reason for the difference was the merging and TNC: Base names could
be merged, occurrences couldn't. Once you had split out base names it made
sense to put the other naming things, related to variant (view specific)
display and sorting, within the same area (topicname) rather than within the
other occurrences.

MArtin