XML Tutorial/XML Schema/gMonthDay
The gMonthDay datatype represents a Gregorian date that recurs yearly
<source lang="xml">
<xsd:element name="birthday" type="xsd:gMonthDay"/>
<birthday>--10-25</birthday></source>
<source lang="xml">
<xsd:element name="birthday" type="xsd:gMonthDay"/>
<birthday>--10-25</birthday></source>