enum element contains a
enumval elements describing
the value/label pairs of a static enumerative type.
An XML identifier for this type.
A label for this type, mainly for documentation purposes.
An SQL type for this attribute. If not specified, it is assumed to be INT.
For the types for which it is meaningful, the size of the attribute. See attr.
For numeric types, the scale, that is, the number of fractional digits. See attr.