[jdom-interest] Valid and Invalid characters.

[Alex Rosen]

> > Also how does a parser handle <> when parsing a document?
>
> Escapes them.

More precisely, when parsing, it unescapes &lt; and &gt; into < and >.
If you tried to put an actual < in an on-disk XML document, the parser
would give you an error. In character data, the strings that must be
escaped are "<" "&" and "]]>".

Alex