Prefer purl as bom-ref

[matglas]

It would be great to be able to use the purl as the bom-ref if it exists. Its unique in a bom in general and I see this pattern in more tools. And if there already is a bom-ref and it can be kept unique in the document don't alter it. For example in assemble command every bom-ref is rewritten.

[viveksahu26]

Looks interesting Point 👍 .

Btw, I agree with you on this:

assemble command every bom-ref is rewritten