XML Tutorial/XML Schema/recurringDate
When the year doesn"t matter, but the month and day do, use xsd:recurringDate
File: Schema.xsd
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.wbex.ru"
xmlns="http://www.wbex.ru"
elementFormDefault="qualified">
<xs:element name="birthday" type="xs:recurringDate" />
</xs:schema>
File: Data.xml
<?xml version="1.0"?>
<birthday>--03-14</birthday>