intro to explicitly linked elements

[jkowalleck]

Try to clarify interlinked elements details

• ref/link directions
• link scopes: in-document, external
• link target: external document, external element, internal element

this is intended to fix #136 and #217

[jkowalleck]

@stevespringett I started with the topic, to show my ideas.
I am not certain if this will make it into milestone 1.5 - depends on my progress.

Anyway, could you have a first review and tell me what you think about the general idea?
If the idea/concept is acceptable, I do need advice: are the details correct and did I miss any element that COULD be used as a BOM-Link?

I would start with the XSD and bring in the JSON schema if the XSD was complete.

[stevespringett]

Anyway, could you have a first review and tell me what you think about the general idea?

I like it. Although technically redundant (a BOM-Link is a URI), the fact the schema specifically calls it out I think is a good thing.

You captured all the places that a BOM-Link can be used. I would recommend proceeding and then spot check the formulation branch to see if there are others.

[jkowalleck]

[...] a BOM-Link is a URI [...]

will change the special BOM-Link types to be based on anyURI/iri-reference, not simple strings.

[jkowalleck]

I transferred all changes from XSD to JSON schema.

⚠️ In addition, I needed some clarity in bom.version, so I changed it to be a positive integer
see #236 (comment)
see #236 (comment)

[jkowalleck]

put to WIP again.
need to incorporate #228

PS: did backmerge of the master. noting else needed changes.

[jkowalleck]

followup: https://cyclonedx.slack.com/archives/CVA0G10FN/p1692519065532109