Saxon

While trying to understand why Saxon-JS 2.3 fails to compile some XSpec where it uses resolve-uri to construct an xsl:import but gets the resolved URI wrong I constructed a reduced test case and surprisingly found that Saxon 10.5 Java for the .xsl file execution gives the the resolved URI I want but when using EE to first compile to .sef it shows the same difference in the URI that Saxon-JS 2.3 creates.

Test environment has directory resolve-uri-test with subdirectories compiler with subdirectory xslt:

C:\Users\marti\OneDrive\Documents\xslt\blog-xslt-3-by-example\resolve-uri-test>dir compiler

 Verzeichnis von C:\Users\marti\OneDrive\Documents\xslt\blog-xslt-3-by-example\resolve-uri-test\compiler

03.09.2021  11:12    <DIR>          .
03.09.2021  11:12    <DIR>          ..
03.09.2021  11:12             1.918 compile-xslt-tests-HE.xsl.sef
03.09.2021  11:01               486 compile-xslt-tests.xsl
03.09.2021  11:10             1.739 compile-xslt-tests.xsl.sef.json
03.09.2021  10:52    <DIR>          xslt

C:\Users\marti\OneDrive\Documents\xslt\blog-xslt-3-by-example\resolve-uri-test>dir compiler\xslt

 Verzeichnis von C:\Users\marti\OneDrive\Documents\xslt\blog-xslt-3-by-example\resolve-uri-test\compiler\xslt

03.09.2021  10:52    <DIR>          .
03.09.2021  10:52    <DIR>          ..
03.09.2021  10:57               780 main.xsl

File compile-xslt-tests.xsl is

<?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"
    xmlns:math="http://www.w3.org/2005/xpath-functions/math"
    exclude-result-prefixes="xs math"
    version="3.0">
    
    <xsl:output indent="yes"/>
    
    <xsl:include href="xslt/main.xsl"/>
    
    <xsl:template name="xsl:initial-template">
        <xsl:call-template name="main"/>
    </xsl:template>
    
</xsl:stylesheet>

File main.xsl is

<?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 name="main">
        <xsl:element name="xsl:stylesheet">
            <xsl:attribute name="version" select="3.0"/>
            <xsl:attribute name="exclude-result-prefixes">#all</xsl:attribute>
            <xsl:for-each
                select="
                '../../common/runtime-utils.xsl'">
                <xsl:element name="xsl:include">
                    <xsl:attribute name="href" select="resolve-uri(.)" />
                </xsl:element>
            </xsl:for-each>
        </xsl:element>
        
    </xsl:template>
    
</xsl:stylesheet>

Now running Saxon HE or EE Java against the compile-xslt-tests.xsl gives

C:\Users\marti\OneDrive\Documents\xslt\blog-xslt-3-by-example\resolve-uri-test>java -jar "C:\Program Files\Saxonica\SaxonHE10-5J\saxon-he-10.5.jar" -t -it -xsl:compiler\compile-xslt-tests.xsl
Saxon-HE 10.5J from Saxonica
Java version 1.8.0_292
URIResolver.resolve href="xslt/main.xsl" base="file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/resolve-uri-test/compiler/compile-xslt-tests.xsl"
Stylesheet compilation time: 676.063ms
Processing  (no source document) initial template = xsl:initial-template
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="3"
                exclude-result-prefixes="#all">
   <xsl:include href="file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/resolve-uri-test/common/runtime-utils.xsl"/>
</xsl:stylesheet>

while running Saxon HE or EE Java against compile-xslt-tests-HE.xsl.sef gives

C:\Users\marti\OneDrive\Documents\xslt\blog-xslt-3-by-example\resolve-uri-test>java -jar "C:\Program Files\Saxonica\SaxonHE10-5J\saxon-he-10.5.jar" -t -it -xsl:compiler\compile-xslt-tests-HE.xsl.sef
Saxon-HE 10.5J from Saxonica
Java version 1.8.0_292
Stylesheet compilation time: 515.0315ms
Processing  (no source document) initial template = xsl:initial-template
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                version="3"
                exclude-result-prefixes="#all">
   <xsl:include href="file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/common/runtime-utils.xsl"/>
</xsl:stylesheet>

So the difference is in the constructed xsl:include/@href URIs:

file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/resolve-uri-test/common/runtime-utils.xsl
vs.
file:/C:/Users/marti/OneDrive/Documents/xslt/blog-xslt-3-by-example/common/runtime-utils.xsl

What should be the base URI for resolve-uri called in an included module, the one of the included file or the one of the including file?