This document uses stream management terms described in [RFC9000], Section 1.3 including STOP_SENDING, RESET_STREAM, and FIN. It also uses RESET_STREAM_AT from [I-D.draft-ietf-quic-reliable-stream-reset]. RESET_STREAM_AT can be used by MOQT, but the protocol is also designed to work correctly when the extension is not supported.
When this document says an endpoint "resets" a stream, it means the endpoint sends a RESET_STREAM or RESET_STREAM_AT frame on that stream (see Section 11.4.3 for considerations on choosing between them).