Converting RNG to xsd using Trang drops a:documentation element content

[macksol]

When converting java -Xmx10G -jar trang-20181222\trang.jar -I rng -O xsd simple.rng simpletrang.xsd the schema is correctly converted but any element/other namespace content is dropped from the annotations

So <a:documentation>test top level rng schema</a:documentation> correctly gets converted to a text only xsd:documentation element but

<a:documentation>What happens now
xhtml:div
xhtml:pThe country attribute provides a choice of:</xhtml:p>
xhtml:ul
xhtml:liUS</xhtml:li>
xhtml:liJP</xhtml:li>
</xhtml:ul>
</xhtml:div>
<ci:include href="zoo-doc.xhtml" xpointer="cheetah"/>
</a:documentation>
is dropped completely

Developers want to include formatted annotations on our schema and pass them through to XSD schema so the documentation is also their.
This will also allow developers to use documentation creation tools (such as the one provided by Oxygen) that supports XSD inpout but not RNG.

See Zip for example input and output

simple.zip

[Zastai]

I can't even get plain text <a:documentation>foo</a:documentation> tags in an RNG schema to be preserved as <xs:annotation><xs:documentation>foo</xs:documentation></xs:annotation>.