[relax-ng] Trang XSD output

I was a little surprised that elements with <text/> content were translated
to have mixed content in the Trang XSD output. For example:

<element name="day">
 <text/>
</element>

becomes

<xs:element name="day">
  <xs:complexType mixed="true"/>
</xs:element>

which is an implicit anyType.

I suppose this is an early, alpha version approach that will fade away in
later versions. Am I right?

Mike