Mega Code Archive

 

Categories / XML Tutorial / XML Schema

 

To match a string of any length (including the empty string) that is comprised exclusively of lower-case ASCII letters

<xs:pattern value="[a-z]*" /> Below is an example of element content that matches the above pattern: <example>qwertyuiop</example> Describing structured numeric strings like US Social Security Numbers (SSNs):  <xs:pattern value="\d{3}-\d{2}-\d{4}" /> Allow only the ten ASCII digits, using this character class expression <xs:pattern value="[0-9]{3}-[0-9]{2}-[0-9]{4}" />