Uniform Resource Identifiers
<?xml version="1.0"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.java2s.com" xmlns="http://www.java2s.com" elementFormDefault="qualified"> <xs:simpleType name="uri_Scheme"> <xs:restriction base="xs:string"> <xs:pattern value="[A-Za-z]([A-Za-z0-9\+\-\.])*" /> </xs:restriction> </xs:simpleType> </xs:schema>