topic Registered
Verified 2026-09-19 · registry updated 2025-10-02

HTTP registry: exi

W3C Efficient XML Interchange

HTTP parameter values extend negotiation, framing, preferences, range handling, or other protocol components. exi is registered in HTTP Content Coding Registry. Defining reference: W3C Recommendation: Efficient XML Interchange (EXI) Format.

httpregistryhttp-parameterscontent-coding

Identifier (http)

exi

W3C Efficient XML Interchange

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/content-coding

Registry reference: W3C Recommendation: Efficient XML Interchange (EXI) Format

Permalink: https://merginit.com/reference/http/registry/http-parameters/content-coding/exi-113