# Prioritization The base HTTP/3 specification doesn't define prioritization itself. The HTTP/2 approach to prioritization has been deemed too complicated and is deprecated by the latest revision of the HTTP/2 specification [RFC 9113](https://www.rfc-editor.org/rfc/rfc9113.html). A simpler alternative, the Extensible Prioritization Scheme for HTTP ([RFC 9218](https://www.rfc-editor.org/rfc/rfc9218.html)), has been published separately, which can be used in both HTTP/2 and HTTP/3. In HTTP/3, priority signals are sent in the form of the Priority header field and/or the PRIORITY\_UPDATE frame sent on the HTTP/3 Control Stream. Servers can act on these signals to schedule sending of HTTP response content. [RFC 9218](https://www.rfc-editor.org/rfc/rfc9218.html) provides scheduling guidance that is intended to improve client web application performance. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://http3-explained.haxx.se/en/h3/h3-prio.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.