<grammar xmlns=“relaxng.org/ns/structure/1.0”>
<include href="addressBook.rng"> <define name="cardContent"> <element name="name"> <text/> </element> <element name="emailAddress"> <text/> </element> </define> </include>
</grammar>
<grammar xmlns=“relaxng.org/ns/structure/1.0”>
<include href="addressBook.rng"> <define name="cardContent"> <element name="name"> <text/> </element> <element name="emailAddress"> <text/> </element> </define> </include>
</grammar>