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