Re: Convention for mimicking inheritance in RELAX NG

I created a syntax sugar for this convention.  You can write

  <class name="animal" abstract="true"/>

  <class name="mamal" base="animal" abstract="true"/>

  <class name="cat" base="mamal">
    <optional>
      <attribute name="color"/>
    </optional>
  </class>

.

By applying the attached XSLT stylesheet, you get a RELAX NG schema.