Hi Dave,
Le lundi 12 septembre 2005 à 15:09 +0100, Dave Pawson a écrit :
> html has an img element,
> the height attribute can be either
>
> 128 or 60%
>
> How do I specify this in rng please?
>
> <attribute name="height">
> <choice>
> <data type="positiveInteger"/>
> <group>
> <data type="positiveInteger"/>
> <value>%</value>
> </group>
> </choice>
> </attribute>
No, you can't write :
<group>
<data type="positiveInteger"/>
<value>%</value>
</group>
Each of the "data" or "value" patterns takes a text node (or attribute
value) as a whole...
> isn't working. I want a positive integer, with the 'units' (%).
The closest you can do following this principle, if your value and unit
are separated by a whitespace, is to use a list pattern to split your
text:
<attribute name="height">
<list>
<data type="positiveInteger"/>
<optional>
<value>%</value>
</optional>
</list>
</attribute>
or
attribute height {
list { xsd:positiveInteger, "%"? }
}
That would validate "3", "3 %"" but not "3%".
If you really need to validate "3%", you bust use a token and a pattern
facet:
attribute height {
xsd:token {pattern ="[0-9]+%?"}
}
or
<attribute name="height">
<data type="token">
<param name="pattern">[0-9]+%?</param>
</data>
</attribute>
the downside is that you loose the semantics of saying that you want a
value followed by a unit...
Hope this helps.
Eric
>
> James's xhtml shows
>
> # nn for pixels or nn% for
> Length.datatype = text
>
> Does that means its a no no?
>
>
>
>
--
Lisez-moi sur XMLfr.
http://xmlfr.org/index/person/eric+van+der+vlist/
------------------------------------------------------------------------
Eric van der Vlist http://xmlfr.org http://dyomedea.com
(ISO) RELAX NG ISBN:0-596-00421-4 http://oreilly.com/catalog/relax
(W3C) XML Schema ISBN:0-596-00252-1 http://oreilly.com/catalog/xmlschema
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