Is "PURL" (all caps) considered an incorrect abbreviation?

[joeattardi]

All throughout the spec, the abbreviation "purl" (all lowercase) is used. I was wondering, is this intentional - is all uppercase ("PURL") or a mix ("pURL") considered incorrect when referring to a package URL?

[prabhu]

@joeattardi, the value that begins with pkg: is more important. I have tools that use purl as a "bom-ref" and other ids for uniqueness.

[noqcks]

I have the same question.

I see purl being used. Example: https://tomalrichblog.blogspot.com/2023/12/the-naming-problem-isnt-complicated-if.html

And PURL. Example: https://resilientcyber.substack.com/p/whats-in-a-name

Would be great to give guidance on the correct naming usage.

[jbmaillet]

...and here is another example with all caps, from people who should know:
CVEProject/cve-schema#173
These is the kind of pesky detail that does not help convincing decision maker that a project is serious.