[xquery-talk] [XQuery] limitations

Michael Kay mike at saxonica.com
Wed Apr 29 18:06:45 PDT 2009

XQuery is a Turing complete functional language, so its computational power
is the same as that of all modern programming languages.

If there are limitations, they lie in the data model, not in the expressive
power of the language. For example, if your source documents have unparsed
entities, XQuery is unable to see them.

Michael Kay

> -----Original Message-----
> From: talk-bounces at x-query.com 
> [mailto:talk-bounces at x-query.com] On Behalf Of Michalmas
> Sent: 29 April 2009 16:42
> To: talk at x-query.com
> Subject: [xquery-talk] [XQuery] limitations
> Hi gents,
> I was wondering what are the limitations of XQuery? For 
> instance, there are some limitations of regular exp (you 
> can't parse what is not defined by a regular language). Since 
> XQuery uses XPath which uses reg exp - does it bring any 
> limitations to XQuery search engine?
> I tried to google some examples, but mostly someone was able 
> to prepare interesting query.
> I mean here typical XQuery and reg exp (there are some 
> extensions to reg exp that diminish such limitations somehow, 
> but here i am interested in pure definitions)
> Thanks,
> Michal
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