[osis-core] Index

[Todd Tillinghast]

It seems that giving index a FIXED number of levels is a short sighted
solution.

I would rather see a solution where the index is expressed in a single
attribute, with its level oriented components delimited by some character.
It is possible to have a numeric level attibute to indicate the level of the
index.  Further, the "see" attribute would have the same form as the index
itself (all one string).   This would give us a much more flexable solution
without giving up anything.

In this case I am not sure what the value of "sort of" following the TEI
standard is.

Todd