1<element name="addressBook" xmlns="http://relaxng.org/ns/structure/1.0" xmlns:a="http://www.example.com/annotation"> 2 <zeroOrMore> 3 <element name="card"> 4 <a:documentation>Information about a single email address.</a:documentation> 5 <element name="name"> 6 <text/> 7 </element> 8 <element name="email"> 9 <text/> 10 </element> 11 </element> 12 </zeroOrMore> 13</element> 14