
  Problems
 ----------



XML Parser:

The XML parser will try to expand entities in the XML file. Therefore
it will choke on expressions using the '&&' operator. To keep th parser
happy, use '&amp;&amp;' instead of '&&'.

For similar reasons, '<' (but not '>') is disallowed as well. Use
'&lt;' instead.



Speed:

If performance is important, consider not using the 'regex' command
since it is extremely slow. When possible, use the 'substr' (find
substring) and 'start' (find in start of string) commands instead.



Language:

Nested 'if' clauses are not allowed. In fact, 'if' clauses are not
allowed in nested contexts at all.
