Re: saxon:evaluate() in schematron

Hello.

I'm working on a schematron script (iso schematron) in which I'm trying to confirm a relationship between two elements representing containing boxes. So, source xml looks like 

<ref id="r7">
     <label>5</label>
     <block n="10" page="p-65" x1="579" y1="4604" x2="2634" y2="4682"/>
     <citation id="c19" citation-type="other">
         <line n="10" page="p-65" x1="1690" y1="4604" x2="2612" y2="4682"><![CDATA[Walther Straram, Paris, 193I]]></line>
     </citation>
</ref>

. and the relationship I'm looking for is whether the line (or lines) are within the block, and, most frustratingly, which coordinates are at fault if it doesn't fit.

My schematron pattern uses one function to ascertain whether or not the line fits, and, if not, attempts to run the 'reportBadCoords' function to identify which coordinates fail. The function looks like this 

  <xsl:function name="ins:reportBadCoords" as="xs:string">
         <xsl:param name="coordNode" as="node()"/>
         <xsl:param name="coordName" as="xs:string"/>
         <xsl:param name="blockPath" as="xs:string"/>
         <xsl:param  name="context" as="node()"/>
         <xsl:variable as="xs:string" name="blkCoordPath" select="concat('/',$blockPath,'/@',$coordName)"/>
        <xsl:choose>
            <xsl:when test="$coordName = 'x1'
                and number(saxon:evaluate(concat('$p1',$blkCoordPath),$context))&lt; number($coordNode)"><xsl:value-of select="$coordName"/></xsl:when>
            <xsl:when test="$coordName = 'x2'
                and number(saxon:evaluate(concat('$p1',$blkCoordPath),$context))&gt; number($coordNode)"><xsl:value-of select="$coordName"/></xsl:when>
            <xsl:when test="$coordName = 'y1'
                and number(saxon:evaluate(concat('$p1',$blkCoordPath),$context))&lt; number($coordNode)"><xsl:value-of select="$coordName"/></xsl:when>
            <xsl:when test="$coordName = 'y2'
                and number(saxon:evaluate(concat('$p1',$blkCoordPath),$context))&gt; number($coordNode)"><xsl:value-of select="$coordName"/></xsl:when>
           <!-- debugging -->
            <xsl:otherwise><xsl:value-of select="concat(saxon:evaluate(concat('$p1',$blkCoordPath),$context),'::',$coordName,'::',$blkCoordPath,'::',$coordNode)"/>
         </xsl:otherwise>
         </xsl:choose>
     </xsl:function>

and is invoked from this rule.

  <rule context="line">
             <let name="lineNo" value="@n"/>
             <let name="refId" value="ancestor::ref/@id"/>
             <let name="artId" value="ancestor::article/front/article-meta/article-id[@pub-id-type='doi']"/>
             <assert test="some $bl in ancestor::ref/block satisfies(ins:isContainedInBlock($bl, .))">
                 The current citation line (number:<value-of select="$lineNo"/>  ) does not fit within any of the defined blocks in the containing ref (ref id =<value-of select="$refId"/>).
                  [article id =<value-of select="$artId"/>].
                 Bad coords:
                 <value-of select="for $coord in @*[matches(name(),'[xy][12]')] return ins:reportBadCoords($coord,name($coord),functx:path-to-node-with-pos(ancestor::ref/block),current())"/>
             </assert>
         </rule>

When I test this script in Oxygen 13.2, with Saxon PE 9.305, I either fail to return any value from the evaluate() function, or if I remove the reference to context and just pass $blkCoordPath straight to evaluate(), I get message that I'm selecting root node without proper context, or context undefined.

Thanks for any help.

Matt S.

--
Gerrit Imsieke
Geschdftsf|hrer / Managing Director
le-tex publishing services GmbH
Weissenfelser Str. 84, 04229 Leipzig, Germany
Phone +49 341 355356 110, Fax +49 341 355356 510
gerrit.imsieke@xxxxxxxxx, http://www.le-tex.de

Registergericht / Commercial Register: Amtsgericht Leipzig
Registernummer / Registration Number: HRB 24930

Geschdftsf|hrer: Gerrit Imsieke, Svea Jelonek,
Thomas Schmidt, Dr. Reinhard Vvckler