Update ReferenceImplementation.md

[zachzeus]

Here are the links to the initial reference components.

NOTE: These tools are in active development and may not be ready for use.

[onthebreeze]

I suggest we switch the link resolver reference from the GS1 DLR (which works only for GS1 keys) with a pointer to https://github.com/uncefact/project-digitallink - noting that it's empty but that work will kick off in July

[PatStLouis]

Is this a reference implementation or an implementer's toolkit?

[philarcher]

See my PR #114. I'm suggesting the term "Identity Resolver" rather than anything with 'Digital Link' in the title.

[zachzeus]

Hi @onthebreeze - should we create a new repo for the new project - something like 'project-identity-resolver' - I've updated to reflect that.

[zachzeus]

@PatStLouis - I think you're right it is more like an implementers toolkit at this point. I'd be interested in your perspective on the difference.

The main thing that I'm considering here is that I don't think that the tools we're pointing at now will be the only tools that will be developed.

So reference implementation was chosen to signal that you don't need to use these tools to be a UNTP implementer.

[onthebreeze]

It's ok as a starting point. I think it needs more context about how these parts fit together and where implementers can substitute their own products.