A.xml

<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="A" xmlns:xs="http://www.w3.org/2001/XMLSchema">
   <xs:element name="A">
       <xs:complexType>

<xs:annotation> <xs:documentation>Квитанция УТМ</xs:documentation> </xs:annotation>

           <xs:sequence>

<xs:element name="url" type="URL" minOccurs="1" maxOccurs="1"/> <xs:element name="sign" type="SIGN" minOccurs="1" maxOccurs="1"/> <xs:element name="ver" type="xs:integer" minOccurs="1" maxOccurs="1"/>

           </xs:sequence>
       </xs:complexType>

</xs:element>

   <xs:simpleType name="URL">
       <xs:restriction base="xs:string">
          <xs:pattern value="(http:\/\/check\.egais\.ru\?id=)?([0-9a-f]{4}-?){8}(&dt=[0-9]{10}&cn=[0-9]{12})?"/>
       </xs:restriction>
   </xs:simpleType>
   <xs:simpleType name="SIGN">
       <xs:restriction base="xs:string">
          <xs:pattern value="[0-9A-F]{128}"/>
       </xs:restriction>
   </xs:simpleType>
</xs:schema>