Repro for ndw/xmlcalabash1 issue #51

gistfile1.md

Try this in the issue51 directory:

calabash -U org.xmlresolver.Resolver test.xpl

It returns:

SEVERE: com.xmlcalabash.core.XProcException: Error loading schema

main.rng

<?xml version="1.0" encoding="UTF-8"?>
<grammar xmlns="http://relaxng.org/ns/structure/1.0">
  <include  href="./sub.rng"/>
</grammar>

sub.rng

<?xml version="1.0" encoding="UTF-8"?>
<grammar 
    xmlns="http://relaxng.org/ns/structure/1.0"
    xmlns:a="http://relaxng.org/ns/compatibility/annotations/1.0"
    datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
    <start>
        <element name="doc"><empty/></element>
    </start>
</grammar>

test.xpl

<p:declare-step version="1.0" xmlns:p="http://www.w3.org/ns/xproc">
        
    <p:validate-with-relax-ng>
        <p:input port="source">
            <p:inline><doc/></p:inline>
        </p:input>
        <p:input port="schema">
            <p:document href="./schema/main.rng"/>
        </p:input>
    </p:validate-with-relax-ng>
    <p:sink/>
</p:declare-step>