RE: [F&O] INF, -INF and NaN - literals?

This is a bug in the F&O spec. While you can use INF, -INF and NaN in a
schema-validated document such as in value="INF", in XQuery, you need to
use the constructor functions as Michael Kay says.

Best regards
Michael

> -----Original Message-----
> From: public-qt-comments-request@w3.org [mailto:public-qt-comments-
> request@w3.org] On Behalf Of Colin Paul Adams
> Sent: Friday, January 14, 2005 12:23 AM
> To: public-qt-comments@w3.org
> Subject: [F&O] INF, -INF and NaN - literals?
> 
> 
> 15.4.2.1 Shows an example:
> 
> fn:avg((INF, -INF)) returns NaN.
> 
> Are INF, -INF and NaN supposed to be literals of type xs:double, as
> is implied by this example (at least, that's the inference I draw)?
> Because the grammar for literals does not include them.
> Elsewhwere I can only find mention of them as special string values
> for the xs:double constructor.
> 
> My XPath parser currently parses these expressions as child::INF
> etc. Clearly I have a problem with the interpretation of the grammar.
> --
> Colin Paul Adams
> Preston Lancashire