Robert Sanderson wrote:

> Here's my use case:
> 
>   foo.fileName =/substring=-5 .html
> 
> Find all filenames that end in '.html', which can't otherwise be
> accomplished unless you can start a number of characters back from the
> end.

If that's why you want, then why not create an operator or modifier such 
as "ends-with", rather than creating an obscure and error prone
substring modifier?

Ashley.
-- 
Ashley Sanders               [log in to unmask]
Copac http://copac.ac.uk A MIMAS Service funded by JISC