Issue warning for duplicate descriptions or titles

[ElliotSilver]

I just became aware that, likely due to a cut and paste error, an IG I'm working on has two resources with the same title on the artifacts page, and several more with the same couple of descriptions.

There may be limited reasons to have duplicate titles or descriptions (multiple versions of the same ValueSet--or an expansion of an intensional ValueSet--within one IG are an unlikely, but potentially reasonable instance).

Since duplicate titles and descriptions are not usually (but are occasionally) desired it makes sense to flag this situation as a warning.

I can't think of other elements that should also be flagged as usually be unique within an IG.

[lmckenzi]

Are you using the HL7 template? It will belly-ache because duplicate names cause Jira issues. The base template won't.

[ElliotSilver]

No, this isn't an HL7 template, but it's also not names that I ran into trouble with--it's titles and descriptions.

[ElliotSilver]

Consider issuing warning for descriptions, titles or names which are just copied from one of the other elements.

[lmckenzi]

We think it should be an error if there are multiple non-example resources of the same resource type with the same "name" - but need confirmation from @grahamegrieve that it's not possible to have multiple versions of the same resource (different ids, same canonical) in a single package..

For examples, treat it as a warning if multiple resources of the same type have the same "name"

Also raise a warning if title or description are not distinct across all resources in an IG (regardless of type or whether they are examples)

The title and description warnings should hold both for the metadata on the resources as well as the entries in ImplementationGuide.definition.resource.