RE: [xsl] XQuery 1.0 and XPath 2.0 Functions and Operators Version 1.0

[Jim Melton <jim.melton@xxxxxxx>]

Joerg,

Thank you very much for your comments on the Functions and Operators 
document.  Your thoughts on the tradeoffs of core document content versus 
additional libraries of functions are appreciated.

Thanks,
   Jim (one of the editors of F&O)

At 12:12 PM 9/6/2001 +0200 Thursday, Joerg Pietschmann wrote:
> "Chris Bayes" <chris@xxxxxxxxxxx> wrote
> > Well it is a good idea to keep it small I'd like to see xsl become all
> > pervasive even to handheld devices as well as to mainframe database
> > apps.
> > As long as the extension mechanism is well defined and standard across
> > all xslt 2.0 implementations then things like trig functions can be
> > added as needed.
>
> I'd rather have a small core functionality and some well defined,
> standardized libraries which implements additional functionality
> and may be unavailable on certain platforms/implementations.
> Some possible libraries/packages:
>  calendar
>  extended math/trig
>  user information database access
>  output control
>  file system access (file existence, modification date...)
>  extended node set manipulation (sort, uniq, symmetric difference...)
>  localised string manipulation (upcase...)
>  unicode character transformations ("uncompose", making characters from
>  numbers...)
>  font property access (fit SVG rectangles around a string)
>  image property access (format/encoding, width, hight, color depth...)
> Namespaces woul prevent name clashes, as usual.
> It would be interesting whether standardized *XSL* libraries would
> not only include XPath extension functions but also built-in
> variables (aka constants) and predefined templates. Stuff the processor
> knows about could be more efficiently implemented/preoptimized.
>
> For example:
> <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>     xmlns:xsltrig="http://www.w3.org/1999/XSL/Transform/math/trig";
>     xmlns:xslposix="http://www.w3.org/1999/XSL/Transform/os/posix";>
>   <xsl:template match="/">
>    <xsl:if test="not(xslposix:file-accessible('lock'))">
>      <xsl:call-template name="xslposix:mkdir">
>        <xsl:param name="name" select="concat('stuff',xsltrig:sin(0.1 * 
> $PI)"/>
>      </xsl:call-template>
>    </xsl:if>
>   </xsl:template>
> </xsl:stylesheet>
>
> Oh well, i've probably gone much too far...
>
> Regards
> J.Pietschmann
>
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list

========================================================================
Jim Melton --- Editor of ISO/IEC 9075-* (SQL)     Phone: +1.801.942.0144
Oracle Corporation            Oracle Email: mailto:jim.melton@xxxxxxxxxx
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=  Facts are facts.  However, any opinions expressed are the opinions  =
=  only of myself and may or may not reflect the opinions of anybody   =
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