Trimming Whitespace in XSLT

After some digging with Google and a hit on the W3C website, it appears that the String.trim() equivalent in XSLT is normalize-space().

"XQuery 1.0 and XPath 2.0 Functions and Operators (Second Edition)." W3C.

Visualforce Misinterprets Empty xmlns Attributes

For unknown reasons, Visualforce does not handle an empty xmlns attribute inside a DIV tag. Unexpected behavior will result if a DIV tag is used inside a Visualforce page with xmlns="" specified as an attribute.

If a Visualforce page that contains simple HTML is not rendering like the page from which the HTML was copied, checking for empty xmlns attributes may be the key to fixing the problem.