Canonical URL of the ViewDefinition, SQLQuery Library or SQLView Library to execute, optionally with a |version suffix pinning a version. Exactly one of subjectCanonical, subjectReference and subjectResource is supplied; supplying none, or more than one, is rejected with 400 Bad Request.

Literal location of the subject to execute: a relative URL on this server, or an absolute URL. Not a canonical URL; use subjectCanonical for that. Exactly one of subjectCanonical, subjectReference and subjectResource is supplied; supplying none, or more than one, is rejected with 400 Bad Request.

Inline ViewDefinition, SQLQuery Library or SQLView Library to execute. Exactly one of subjectCanonical, subjectReference and subjectResource is supplied; supplying none, or more than one, is rejected with 400 Bad Request. Carries a resource, so it requires POST. The declared type is CanonicalResource because ViewDefinition is a logical model rather than a FHIR resource; see Common Operation Behavior (operations-common.html#declared-type).

Input parameter values for the subject, bound by name to the parameters the Library declares (Library.parameter.name), using the value[x] type matching each declared type. Permitted only where the subject is a SQLQuery or SQLView; supplying it where the subject is a ViewDefinition is rejected with 400 Bad Request, because a ViewDefinition declares no parameters. Carries a resource, so it requires POST.

Supporting artifacts the server cannot itself resolve, supplied inline and matched by canonical URL against the dependencies in the subject's transitive relatedArtifact graph. Accepts inline resources only; there is no context by canonical URL, because a URL is exactly what the server has already failed to resolve. Carries a resource, so it requires POST. See Common Operation Behavior (operations-common.html#context).

FHIR resources to transform instead of using server data. Repeatable. A Bundle supplied here is unwrapped: the view runs against each Bundle.entry[*].resource rather than against the Bundle itself. Permitted only where the subject is a ViewDefinition; supplying it where the subject is a SQLQuery or SQLView is rejected with 400 Bad Request, because how inline resources reach each dependency view is not specified. Carries a resource, so it requires POST. See OperationDefinition-SQLRun notes (Resource parameter and Bundle inputs).

Output format for the result (json, ndjson, csv, parquet, fhir). Use fhir to return results as a FHIR Parameters resource. Optional; if omitted, the server returns ndjson by default. See Common Operation Behavior (operations-common.html).

Include CSV headers (default true). Applies only when csv output is requested.

Restrict the FHIR resources feeding the view, before projection, to the supplied patient(s). Where the subject is a SQLQuery or SQLView, that means before the SQL executes. An unresolvable patient is rejected with 400 Bad Request. See Common Operation Behavior (operations-common.html#patient-filter).

Restrict the FHIR resources feeding the view, before projection, to members of the supplied group(s). Where the subject is a SQLQuery or SQLView, that means before the SQL executes. An unresolvable group is rejected with 400 Bad Request. See Common Operation Behavior (operations-common.html#group-filter).

Include only resources whose state changed after this instant. See Common Operation Behavior (operations-common.html#since-filter).

External data source to read from instead of the server's own data (for example a URI or bucket name). Where the subject is a SQLQuery or SQLView, this is where the ViewDefinition tables the query selects from are found.

Maximum number of rows to return.

Result rows in the requested output format, returned as a raw binary stream in the format's native media type, not a serialized Binary resource envelope. When _format=fhir is requested, the response is a Parameters resource instead. See Common Operation Behavior (operations-common.html).