<xsd:group name="para-level"> <xsd:choice> <xsd:group ref="block-display.class"/> <xsd:group ref="block-math.class"/> <xsd:group ref="list.class"/> <xsd:group ref="math.class"/> <xsd:group ref="nothing-but-para.class"/> <xsd:group ref="related-article.class"/> <xsd:group ref="rest-of-para.class"/> <xsd:group ref="x.class"/> </xsd:choice> </xsd:group> |