proposal for Helm type

[tstephen-relx]

No description provided.

[javierfreire]

I was also interested in having this purl type, but I would like it to also support an OCI registry.

Reviewing the spec:

A URL host or Authority must NOT be used as a namespace. Use instead a repository_url qualifier

So I think using the repository_url attribute instead of the namespace would be more correct and would allow using an OCI registry.

Also, I don't know if it would be interesting to add the sha256 as an attribute (could be digest or checksum like the generic type) in the case of OCI.

Examples::

pkg:helm/postgresql@13.0.0?repository_url=oci://registry-1.docker.io/bitnamicharts
pkg:helm/postgresql@13.0.0?repository_url=oci://registry-1.docker.io/bitnamicharts&digest=sha256:e48a5f264166fa36a778501b9df0d61528e5e5fba8c9b2b55dbb914743025df9

[beltran-rubo]

@stevespringett from Bitnami we are interested on using this specification for Helm charts. Anything we can help to add this proposal to the purl standard?