A resolved docs target: which product, whether it's versioned, and (for versioned products) which version — plus the discovery index URL and guidance on how to use it correctly.
Always the unversioned per-product discovery index — never version-scoped.
Usage guidance specific to this product/version combination.
Optional
Present only when versioned is true and a version could be determined.
versioned
A resolved docs target: which product, whether it's versioned, and (for versioned products) which version — plus the discovery index URL and guidance on how to use it correctly.