To be honest: This comment is even more incomplete than you think. It would be pushing the limits of the XML schema to explain the complete syntax of the typeName attribute. The current comment is more like an example.
It is possible to allow several types, devided by | (pipe)
You can use the name of any named type
For simple types, the same syntax as with varType is allowed
For strings the length can be specified, e.g. STRING(255)
These keywords also work:
BASICTYPE
NUMERIC
INTEGER
STRUCT
ARRAY
ARRAY OF ... (any of the previous)
(Enumerations are included in BASICTYPE, NUMERIC and INTEGER.)
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