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