tcCodelists Codelists used in the type catalogue schema Type catalogues 0.1 2007-06-14 specifies aggregation semantics: specifies whether the value of each property is a single value ("noAggregation") which is the default case or if a single property instance has an aggregate value in which case the value specifies the aggregation type ("bag", "set", "sequence"). Note that this value is independent from the cardinality. TC_AggregationType single value - no aggregation (default) noAggregation aggregation semantics: bag bag aggregation semantics: set set aggregation semantics: sequence (ordered bag) sequence