http://www.w3.org/1999/xhtml
group inline.forms

Model

>
(input | select | textarea | label | button)

Source

<xs:group name="inline.forms">
  <xs:choice>
    <xs:element ref="input"/>
    <xs:element ref="select"/>
    <xs:element ref="textarea"/>
    <xs:element ref="label"/>
    <xs:element ref="button"/>
  </xs:choice>
</xs:group>