Module text:matches-regex() - does it exist?

Greetings,

I asked this question in another thread but believe it is more correct 
to ask it with its own subject line. I am trying to use 
text:matches-regex() and get an error message that claims that is not 
available. I am using eXist 1.4.1 and have this setup in my xquery-file:

...
declare namespace text="http://exist-db.org/xquery/text";
....

and try to use it like this:

text:matches-regex(util:document-name($scopesok), "*ht.xml")

and get this error message:

Function text:matches-regex()  is not defined in module namespace: 
http://exist-db.org/xquery/text

Any advice?

Espen S. Ore
University of Oslo

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