Re: [xsl] testing for string and number in XSLT 2.0 was Re: [xsl] Test For Numeric Values?

[James Fuller <jim.fuller@xxxxxxxxxxxxxx>]

>The xsl:analyze-string construct could be written more simply as
>
><xsl:value-of select="matches($select, '[\d]+')"/>
>  
>
i like the matches() function...neat

>>this is fine and dandy in a basic XSLT 2.0 processor, and potentiall
>>could be extended, though I find it uncomfortable that xsl:function
>>automatically casts my params as xs:string when there is no 
>>declaration,
>>    
>>
>
>It doesn't. If you don't declare the types of your parameters then they
>actual values supplied in the function call are passed through unchanged.
>
>  
>
ok understand, btw I assume that tunnel params are not in affect within
params in xsl:functions....

>>so doing something like the following (in an XSLT 2.0 
>>processor that is
>>schema aware).
>>
>>
>>        Test X (xs:integer) matching string
>>        using istype:<xsl:value-of select="type:istype($x,'number')"/>
>>        using isnumber:<xsl:value-of select="type:isnumber($x)"/>
>>        using isstring:<xsl:value-of select="type:isstring($x)"/>
>>    
>>
>
>This doesn't require a schema-aware processor, you aren't doing anything
>here that's not available in a basic processor
>  
>
ok..yes David just corrected me


>>will through out an error, I guess I could employ the 
>>use-when attribute
>>to check for schema conformance (does this exist as a system 
>>property?).
>>    
>>
>
>Yes it does but you don't need it here
>  
>
>>btw, does anyone else find it weird that xsl:function doesnt have the
>>ability to prescribe a return type ?...I wanted to return a boolean
>>type...
>>    
>>
>
>Then (a) declare the type
>
><xsl:function name="x" as="xs:boolean">
>  
>

yes just discovered this as well...feels right, though once again not
the use of XML Schema datatypes....or the option not to use them.

>and (b) return a value of that type
>
><xsl:sequence select="matches($arg, '\d+')"/>
>
>In fact, I think the function you want is:
>
><xsl:function name="type:is-number" as="xs:boolean">
>  <xsl:param name="arg" as="xs:string"/>
>  <xsl:sequence select="matches($arg, '\d+')"/>
></xsl:function>
>
>  
>
so explain to me the scenario

    <xsl:variable name="x" select="example/test[1]" as="xs:integer"/>

<xsl:function name="type:is-number" as="xs:boolean">
  <xsl:param name="arg" as="xs:string"/>
  <xsl:sequence select="matches($arg, '\d+')"/>
</xsl:function>

hehe, no pls dont answer that! really I understand now; 

the fact that BASIC conformance meant XML Schema datatypes are still being used completely went under my radar...so I now understand that value for BASIC conformance is directed towards implementators...

many thx for taking the time to answer my lame questions.

jim