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[xsl] How to make a simple running example using packages?


Subject: [xsl] How to make a simple running example using packages?
From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Sat, 18 Oct 2014 23:46:55 -0000

Hi,

Using the trial version of Saxon 9.6EE and the example package from
the latest XSLT 3.0 Last Call, I am trying to produce a simple,
running example:

using-package.xsl:
==============
<xsl:package name="http://example.org/complex-arithmetic.xsl"
  package-version="1.0"  version="3.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:f="http://example.org/complex-arithmetic.xsl">
  <xsl:use-package name="complex-arithmetic"/>

  <xsl:template match="/">
    <xsl:variable name="vComplex1" select="f:complex-number(1, 0)"
as="map(xs:integer, xs:double)"/>
    Real:      <xsl:sequence select="$vComplex1(0)"/>
    Imaginary: <xsl:sequence select="$vComplex1(1)"/>
  </xsl:template>
</xsl:package>



complex-arithmetic.xsl:
=================
<xsl:package name="complex-arithmetic"
  package-version="1.0"  version="3.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:f="http://example.org/complex-arithmetic.xsl">

  <xsl:function name="f:complex-number"
                as="map(xs:integer, xs:double)" visibility="public">
    <xsl:param name="real" as="xs:double"/>
    <xsl:param name="imaginary" as="xs:double"/>
    <xsl:sequence select="map{ 0:$real, 1:$imaginary }"/>
  </xsl:function>

  <xsl:function name="f:real"
                as="xs:double" visibility="public">
    <xsl:param name="complex" as="map(xs:integer, xs:double)"/>
    <xsl:sequence select="$complex(0)"/>
  </xsl:function>

  <xsl:function name="f:imag"
                as="xs:double" visibility="public">
    <xsl:param name="complex" as="map(xs:integer, xs:double)"/>
    <xsl:sequence select="$complex(1)"/>
  </xsl:function>

  <xsl:function name="f:add"
                as="map(xs:integer, xs:double)" visibility="public">
    <xsl:param name="x" as="map(xs:integer, xs:double)"/>
    <xsl:param name="y" as="map(xs:integer, xs:double)"/>
    <xsl:sequence select="
         f:complex-number(
           f:real($x) + f:real($y),
           f:imag($x) + f:imag($y)"/>
  </xsl:function>

  <xsl:function name="f:multiply"
                as="map(xs:integer, xs:double)" visibility="public">
    <xsl:param name="x" as="map(xs:integer, xs:double)"/>
    <xsl:param name="y" as="map(xs:integer, xs:double)"/>
    <xsl:sequence select="
         f:complex-number(
           f:real($x)*f:real($y) - f:imag($x)*f:imag($y),
           f:real($x)*f:imag($y) + f:imag($x)*f:real($y))"/>
  </xsl:function>

  <!-- etc. -->
</xsl:package>

When I run Saxon 9.6 on using-package.xsl, I get these error messages:

Saxon-EE 9.6.0.1J from Saxonica
Java version 1.7.0_51
Using license serial number Vxxxxxxxxxxxxxxx

Error at xsl:use-package on line 6 column 47 of marrowtr.xsl:
  XTSE3000: Package complex-arithmetic was not found

Error at xsl:variable on line 9 column 101 of marrowtr.xsl:
  XPST0017 XPath syntax error at char 0 on line 9 in {f:complex-number(1, 0)}:
    Cannot find a matching 2-argument function named
  {http://example.org/complex-arithmetic.xsl}complex-number()

Stylesheet compilation failed: 2 errors reported


What should I do in order to make this simple example run as expected?

It is not clear to me how finding a package given its name works -- I
also tried importing complex-arithmetic.xsl into using-package.xsl,
but got this error:

"Error at xsl:import on line 8 column 46 of marrowtr.xsl:
  XTSE0165: Included document complex-arithmetic.xsl is not a stylesheet"


Any guidance how to produce a running example is enormously appreciated.


-- 
Cheers,
Dimitre Novatchev


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