<element name="card" xmlns="http://relaxng.org/ns/structure/1.0">
|
<attribute name="name"/>
|
<attribute name="email"/>
|
<attribute name="preferredFormat">
|
<choice>
|
<value type="string">html</value>
|
<value type="string">text</value>
|
</choice>
|
</attribute>
|
</element>
|
