ReadonlyauthorizationThe caller's current authorization-scope partition input. Its digest must equal the region's, so a scope change can never serve another principal's cached bytes.
Optional ReadonlyboundsExtent the caller is asking about. Must equal the region's own extent.
Optional ReadonlyexpectVersions the caller expects. A drift fails closed instead of serving stale schema.
Optional ReadonlynowOptional ReadonlyqueryProtocol-neutral query the snapshot was planned with. Every resource of a snapshot is identified against its selection's canonical query, so a tile or document planned under a query must be read back under the same one.
Optional Readonlyschemetms rows are folded onto their canonical XYZ row before addressing.
Optional ReadonlysignalOptional ReadonlystaleReadonlystoreReadonlytileOptional ReadonlytileSeparates pyramids that share coordinates but not a grid (for example an OGC tile-matrix set).
Gate inputs plus the store a read will resolve its identity against.