Saxon » SaxonJS

I learned today that using the option -relocate:off when exporting an XSLT stylesheet having included or imported modules is the key to "preserve" the static base URI of each module as otherwise the static-base-uri() is simply the URI of the complete SEF file.

When testing with Saxon JS 2 (2.3, both under Node.js as in the browser), however, I found that exporting from EE for Saxon-JS with -relocate:off ensures that Saxon-JS has a different static-base-uri() for templates from different modules but that resolve-uri($relative-uri) doesn't seem to take that static base URI into account for included modules.

So running e.g.

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    exclude-result-prefixes="#all"
    version="3.0">
    
    <xsl:import href="xslt/inner-base-uri-test1.xsl"/>
    
    <xsl:output indent="yes"/>
    
    <xsl:mode on-no-match="shallow-copy"/> 
    
    <xsl:template match="uri">
        <xsl:copy>
            <xsl:attribute name="static-base-uri" select="static-base-uri()"/>
            <xsl:attribute name="base-uri" select="base-uri()"/>
            <xsl:attribute name="resolve-uri" select="resolve-uri(.)"/>
            <xsl:apply-templates/>
        </xsl:copy>
        <xsl:next-match/>
    </xsl:template>
    
</xsl:stylesheet>

where the inner-base-uri-test1.xsl in the subdir is e.g.

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    exclude-result-prefixes="#all"
    version="3.0">
    
    <xsl:template match="uri">
        <xsl:comment>nested stylesheet module</xsl:comment>
        <xsl:copy>
            <xsl:attribute name="static-base-uri" select="static-base-uri()"/>
            <xsl:attribute name="base-uri" select="base-uri()"/>
            <xsl:attribute name="resolve-uri" select="resolve-uri(.)"/>
            <xsl:apply-templates/>
        </xsl:copy>
    </xsl:template>
    
</xsl:stylesheet>

against an XML sample like

<?xml version="1.0" encoding="UTF-8"?>
<uris>
    <uri>foo.xml</uri>
    <uri>../foo.xml</uri>
    <uri>../../foo.xml</uri>
</uris>

shows that the static-base-uri() result is different in the included module from the subdirectory but the resolve-uri(.) call for the main stylesheet's template and the included one's gives the same result:

<?xml version="1.0" encoding="UTF-8"?>
<uris>
   <uri static-base-uri="file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/resolve-uri-test/compiler/base-uri-test1.xsl" base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml" resolve-uri="https://martin-honnen.github.io/xslt/2021/includes/foo.xml">foo.xml</uri>
   <!--nested stylesheet module--><uri static-base-uri="file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/resolve-uri-test/compiler/xslt/inner-base-uri-test1.xsl" base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml" resolve-uri="https://martin-honnen.github.io/xslt/2021/includes/foo.xml">foo.xml</uri>
   <uri static-base-uri="file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/resolve-uri-test/compiler/base-uri-test1.xsl" base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml" resolve-uri="https://martin-honnen.github.io/xslt/2021/foo.xml">../foo.xml</uri>
   <!--nested stylesheet module--><uri static-base-uri="file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/resolve-uri-test/compiler/xslt/inner-base-uri-test1.xsl" base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml" resolve-uri="https://martin-honnen.github.io/xslt/2021/foo.xml">../foo.xml</uri>
   <uri static-base-uri="file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/resolve-uri-test/compiler/base-uri-test1.xsl" base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml" resolve-uri="https://martin-honnen.github.io/xslt/foo.xml">../../foo.xml</uri>
   <!--nested stylesheet module--><uri static-base-uri="file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/resolve-uri-test/compiler/xslt/inner-base-uri-test1.xsl" base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml" resolve-uri="https://martin-honnen.github.io/xslt/foo.xml">../../foo.xml</uri>
</uris>

https://martin-honnen.github.io/xslt/2021/resolve-uri-test1.html is the online, client-side Saxon-JS 2.3 test case.

The result that Saxon-Java gives is showing differences for the resolve-uri(.) calls based on whether it is done in the template of the main stylesheet or the included module e.g.

<?xml version="1.0" encoding="UTF-8"?>
<uris>
   <uri static-base-uri="https://martin-honnen.github.io/xslt/2021/includes/base-uri-test1.xsl"
        base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml"
        resolve-uri="https://martin-honnen.github.io/xslt/2021/includes/foo.xml">foo.xml</uri>
   <!--nested stylesheet module-->
   <uri static-base-uri="https://martin-honnen.github.io/xslt/2021/includes/xslt/inner-base-uri-test1.xsl"
        base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml"
        resolve-uri="https://martin-honnen.github.io/xslt/2021/includes/xslt/foo.xml">foo.xml</uri>
   <uri static-base-uri="https://martin-honnen.github.io/xslt/2021/includes/base-uri-test1.xsl"
        base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml"
        resolve-uri="https://martin-honnen.github.io/xslt/2021/foo.xml">../foo.xml</uri>
   <!--nested stylesheet module-->
   <uri static-base-uri="https://martin-honnen.github.io/xslt/2021/includes/xslt/inner-base-uri-test1.xsl"
        base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml"
        resolve-uri="https://martin-honnen.github.io/xslt/2021/includes/foo.xml">../foo.xml</uri>
   <uri static-base-uri="https://martin-honnen.github.io/xslt/2021/includes/base-uri-test1.xsl"
        base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml"
        resolve-uri="https://martin-honnen.github.io/xslt/foo.xml">../../foo.xml</uri>
   <!--nested stylesheet module-->
   <uri static-base-uri="https://martin-honnen.github.io/xslt/2021/includes/xslt/inner-base-uri-test1.xsl"
        base-uri="https://martin-honnen.github.io/xslt/2021/sample-uris1.xml"
        resolve-uri="https://martin-honnen.github.io/xslt/2021/foo.xml">../../foo.xml</uri>
</uris>

So it seems Saxon-JS 2.3 has a bug in resolve-uri, not taking the static-base-uri into account, even when running an exported SEF/JSON file that was exported with -relocate:off.