> Validation Rules > capella.category > design > well-formedness > dataflows

	DWF_DF_01 - A duplicate or a split function must have only one incoming exchange
This rule checks that a duplicate or a split function have only one incoming exchange.

	DWF_DF_02 - A gather function must have only one outgoing exchange
This rule checks that a gather function must have only one outgoing exchange.

	DWF_DF_03 - Functional chain check
This rule checks that a FunctionalChain is valid.

	DWF_DF_04 - Functional chain involvement check 1
This rule checks that a Functional Chain Involvement only involves an Abstract Function, a Functional Exchange or a Functional Chain.

	DWF_DF_05 - Functional chain involved functions active in state
This check ensures that all the functions involved in FunctionalChain are also active in modes and states as FunctionChain.

	DWF_DF_06 - Functional Exchange location check
This rule ensures that Functional Exchange is located in the common ancestor between its source/target elements.

	DWF_DF_12 - A duplicate, a gather, a route, a select or a split function must be a leaf function
This rule check that a duplicate, a gather, a route, a select or a split function must be a leaf function.

	DWF_DF_14 - Functional chain involvement allocated exchange items
This rule ensures that a functional chain involvement does not allocate exchange items which are not allocated by involved functional exchange.