2.2.14 Content-Disposition Header Field Extension
This section follows the product behavior described in endnote <10>.
This protocol defines a Content-Disposition header field parameter. The ABNF, as defined in [RFC5234], syntax defined in [RFC3261] section 25.1 is extended as follows:
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Content-Disposition = "Content-Disposition" HCOLON disp-type *(SEMI disp-param) disp-type = "render" / "session" / "icon" / "alert" / disp-extension-token disp-param = handling-param / ms-proxyfallback-param / generic-param ms-proxyfallback-param = "ms-proxy-2007fallback"