{"source":"semconv","version":"1.44.0","attribute":{"id":"tls.next_protocol","type":"string","stability":"development","brief":"String indicating the protocol being tunneled. Per the values in the [IANA registry](https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids), this string should be lower case.","examples":["http/1.1"],"namespace":"tls","definedIn":"model/tls/registry.yaml","usedBy":[]},"history":[{"version":"1.30.0","publishedAt":"2025-01-24T19:11:42Z","kind":"first-seen","detail":"Already present at v1.30.0, the oldest release tracked here (experimental)."},{"version":"1.31.0","publishedAt":"2025-03-11T00:53:13Z","kind":"stability-changed","detail":"Stability label respelled from experimental to development.","severity":"informational"}],"replaces":[]}