L.3.1.2.1 Empty Element

Sometimes, the simple presence of an element is sufficient to convey meaning. That is, in some cases, you do not necessarily need information to be a Boolean, an integer, or complex type.

A simple example is the Show Type element group. In this case, a slide show can be one of three types: present, browse, or kiosk. The schema for this element group is as follows:

<xsd:group name="EG_ShowType">
  <xsd:choice>
    <xsd:element name="present" type="CT_Empty">
    </xsd:element>
    <xsd:element name="browse" type="CT_ShowInfoBrowse">
    </xsd:element>
    <xsd:element name="kiosk" type="CT_Empty">
    </xsd:element>
  </xsd:choice>
</xsd:group>