<grammar xmlns=“relaxng.org/ns/structure/1.0” >
<start> <element name="foo"> <attribute> <choice> <name>alpha</name> <name>bravo</name> </choice> <choice> <value>none</value> <value>all</value> </choice> </attribute> </element> </start>
</grammar>
<grammar xmlns=“relaxng.org/ns/structure/1.0” >
<start> <element name="foo"> <attribute> <choice> <name>alpha</name> <name>bravo</name> </choice> <choice> <value>none</value> <value>all</value> </choice> </attribute> </element> </start>
</grammar>