DMN15 — Depiction of Input Data is not harmonized with BPMN and CMMN

As OMG promotes the integrated use of DMN with BPMN and CMMN, it is proposed to change the depiction of Input in DMN to be the paper Shape with folded corner. We can envision end users wanting to embed DMN diagrams into BPMN or CMMN diagrams. This change would provide better notational alignment with Data Object and Case File Iems in BPMN and CMMN. Futhermore is would remove the notation conflict currently existing between DMN Input and CMMN Milestone.

Idea:
The classical Input Data symbol (oval) remains the default representation for backwards compatibility and is used in all examples throughout the DMN 1.5 standard. Only Tables 1 and 103, where the symbol for the Input Data is presented, the alternative representation is introduced.

Allow alternative representation of DMN Input Data using BPMN Data Object / CMMN Case File Item symbol

The classical Input Data symbol (oval) remains the default representation for backwards compatibility and is used in all examples throughout the DMN 1.5 standard. Only Tables 1 and 103, where the symbol for the Input Data is presented, the alternative representation is introduced.

For diagram interchange, a new property "useAlternativeInputDataShape" is added to the DMNDiagram class.

XSD & MM changes: https://github.com/omg-dmn-taskforce/omg-dmn-spec/pull/25/files