>Why not store the entity declarations in a hash table, hashed by name?
Yes, that might be a good way to do it.
Of course the entity declarations will have the (maybe absolutized)
system ID rather than the maybe-redirected retrieval URI, since they
aren't normally fetched at the time they're declared.
But at least I would know which were external entities. (Internal
entity boundaries are not relevant to base URI calculation.)
When I started, I wasn't expecting to have to look at the entity
declarations at all!
-- Richard
