| <grammar xmlns="http://relaxng.org/ns/structure/1.0"> | |
| <start> | |
| <element name="addressBook"> | |
| <zeroOrMore> | |
| <element name="card"> | |
| <ref name="card.attlist"/> | |
| </element> | |
| </zeroOrMore> | |
| </element> | |
| </start> | |
| <define name="card.attlist"> | |
| <group> | |
| <attribute name="name"> | |
| <text/> | |
| </attribute> | |
| <attribute name="email"> | |
| <text/> | |
| </attribute> | |
| </group> | |
| </define> | |
| </grammar> |