Re: Odd Result-Document Behavior

Im using Saxon 9.6.0.7 via Oxygen.

Im using xsl:result-document with @format to generate result documents.
If I use a variable reference in @format the referenced xml:output is
not used. If I replace the variable reference with a string literal I
get the expected output (in both cases the attribute is an attribute
value template).

My initial code is:

<xsl:result-documenthref="{$mapUri}"format="{$mapFormat}>

Where $mapFormat has the string value map and the map output
declaration is present:

<xsl:paramname="mapFormat"as="xs:string"select="'map'/>

<xsl:output name="map"
     method="xml"
     doctype-public="-//OASIS//DTD DITA Map//EN"
     doctype-system="map.dtd"
     indent="yes"
/>

When I run this, the output is not used (result document has no DOCTYPE
decl and is not indented).

If I replace format="{$mapFormat} with format={map} then I get the
expected result (DOCTYPE decl, indented markup).

So the only difference is the use of the variable reference. Ive
verified that $mapFormat has a value:

<xsl:message>+ [DEBUG]
mapFormat="<xsl:sequenceselect="$mapFormat"/>"</xsl:message>

Which produces:


+ [DEBUG] mapFormat=map"

It seems unlikely that this is a Saxon bug but Im at a loss as to what
I could be doing wrong to cause this behavior.

What am I missing?