DMN17 — Missing properties for DI:DiagramElement in MM

The meta model class DI::DiagramElement is missing properties localStyle and sharedStyle:
https://github.com/omg-dmn-taskforce/omg-dmn-spec/blob/399fd3bff201cfd075435b7019c3be25dfd8306a/xmi/DMNDI15.xmi#L212-L214
which are currently in DMNDiagramElement:
https://github.com/omg-dmn-taskforce/omg-dmn-spec/blob/399fd3bff201cfd075435b7019c3be25dfd8306a/xmi/DMNDI15.xmi#L176-L211

while the XML Schema has them at the right place and also has additional id and extension properties that are not in the MM:
https://github.com/omg-dmn-taskforce/omg-dmn-spec/blob/master/xsd/DI.xsd#L21-L46