Change cardinality for element in SpdxDocument and Bom classes

[goneall]

From the SPDX tech call 30 July 2024, we reached consensus that the SpdxDocument and Bom classees should have a minimum of 1 element.

We should update the model to reflect this decision.

[goneall]

@zvr - How do we override the superclass restrictions to change the cardinality in the markdown files?

[goneall]

@zvr if it's easy, could you create the PR for the cardinality changes? Otherwise, I can do it early Monday - hoping to get this in before the OMG deadline.

[zvr]

Just to verify:

• can be empty:
  • /Core/ElementCollection
  • /Core/Bundle
• must have at least one element
  • /Core/SpdxDocument
  • /Core/Bom
  • /Software/Sbom (inherits from /Core/Bom)

Must these also have at least one rootElement ?

[zvr]

OK, to save us time, I created two PRs, depending on what we need to be non-empty:

• update only element: Bom and SpdxDocument cannot be empty #844
• update both element and rootElement: Bom and SpdxDocument must have element and rootElement #845

We should merge only one of these.