XOM API for Processing XML with Java

[Elliotte Harold <elharo AT metalab.unc.edu>]

I've checked in some more optimizations for namespace URI verification. 
There are two of these:

1. Caching the four most recently used URIs XOM doesn't check them again.
2. checkScheme returns immediately if the scheme is "http"

I did a few things differently than your implementation. Most 
significantly, I use == to compare namespace URIs rather than equals(). 
This speeds things up quite a bit in the common case where the strings 
are in fact the same string. This will be true if the string comes from 
a String literal or a Builder.

--
Elliotte Rusty Harold  elharo AT metalab.unc.edu
XML in a Nutshell 3rd Edition Just Published!
http://www.cafeconleche.org/books/xian3/
http://www.amazon.com/exec/obidos/ISBN=0596007647/cafeaulaitA/ref=nosim