1<element name="example" xmlns="http://relaxng.org/ns/structure/1.0"> 2 <zeroOrMore> 3 <attribute> 4 <anyName/> 5 </attribute> 6 </zeroOrMore> 7 <optional> 8 <attribute name="xml:space"> 9 <choice> 10 <value>default</value> 11 <value>preserve</value> 12 </choice> 13 </attribute> 14 </optional> 15</element> 16