Re: [xsl] Challenge: create xPath 2.0 regular expressions for each XML Schema datatype

[Abel Braaksma <abel.online@xxxxxxxxx>]

David Carlisle wrote:
> Most of those are already listed in the schema spec eg
> http://www.w3.org/TR/xmlschema-2
>
>     <xs:restriction base="xs:short">
>       <xs:minInclusive value="-128" id="byte.minInclusive"/>
>       <xs:maxInclusive value="127" id="byte.maxInclusive"/>
>
> tells you immediately that  the xpath2 for byte is
>
> (:whatever you have for xs:short:) and $value >= -128 and $value <= 127

But he was thinking of a regular expression. Though it seems a bit 
outrageous to create a regex for a byte, it might look something like this:

regex = "^\s*(([+-]?(1[01]\d|12[0-7]|0?\d?\d))|+?128)\s*$"

Note that this regex does not allow for an empty string (which is 
correct, as xs:byte('') would fail)

-- Abel Braaksma
  http://www.nuntia.com