Removing anything between XML tags and their content

Question

I would need to remove anything between XML tags, especially whitespace and newlines.

For example removing whitespace and newslines from:
\\n<

Answer 1

Please don't use regular expressions to parse XML. It's horribly error prone.

Use a proper XML library, which will make this trivial. There are XML libraries available for just about every programming platform you could ask for - there's really no excuse to use a regular expression for XML.