Add project_id to DMP entity

[Sabine-Schoenau]

As we dicussed last wednesday, a project_id would be and important addition to the developed maDMP standard (for us in the RDMO and DMP4NFDI team).

[TomMiksa]

To summarise, you're requesting to add project_id under the project class? Correct?

Currently the only way is to include funding\grant_id as part of the project to indicate it is number. This implies though, that the project is funded and that the grant id is identical with the project id. This is not the case in your setting, correct?