HTTP registry: A positive integer that represents the maximum number of items each collection in a response SHOULD contain.

Requests that each collection within the response contain no more than the number of items specified as the positive integer value of this preference.

HTTP parameter values extend negotiation, framing, preferences, range handling, or other protocol components. A positive integer that represents the maximum number of items each collection in a response SHOULD contain. is registered in HTTP Preferences. Defining reference: OData Version 4.01 Part 1: Protocol.

httpregistryhttp-parameterspreferences

Identifier (http)

A positive integer that represents the maximum number of items each
        collection in a response SHOULD contain.

Requests that each collection within the response contain no more than the number of items specified as the positive integer value of this preference.

Interpret parameters only in the context that defines them; unknown parameters must not silently change security or framing behavior.

This registry value is currently marked active by IANA. Follow the defining specification before sending, accepting, or proxying it.

IANA registry: http-parameters/preferences

Registry reference: OData Version 4.01 Part 1: Protocol

Sources

HTTP Preferences