Publisher-controlled HTTPS URL for the presentation metadata. Consumers MUST apply the same SSRF, redirect, response-size, timeout, and DNS-rebinding protections used for format_schema fetches.
SHA-256 content digest. Consumers cache by uri@digest and MUST fail closed on a digest mismatch.
Media type of the referenced declarative presentation document.
Version of /schemas/core/placement-presentation.json used to validate and compose the referenced document.
Optional publisher-specific declarative frame for representing this placement's real chrome offline. It composes around the selected creative rendering unless the publisher-delegated preview_provider route explicitly covers placement presentation. It MUST NOT be promoted to or copied onto a shared format entry.