Attributes that have (XSD) syntactic default values in earlier versions of schemas should have the syntactic default value removed.
(map)direction
(map)material
val
per
oriented
The normalized serialization should allow the attribute to be optional, and the (currently) default value should (optionally) be one of the possible values.
From http://wiki.ruleml.org/index.php/Default_or_Absent_Attributes
Attributes that have (XSD) syntactic default values in earlier versions of schemas should have the syntactic default value removed.
The normalized serialization should allow the attribute to be optional, and the (currently) default value should (optionally) be one of the possible values.