The MS-Author-Via response header suggests to certain authoring applications the protocol mechanism to author with. The preference is ordered, so the first mechanism listed is the one most strongly suggested.<3>

MS-Author-Via = "MS-Author-Via" ": " ("DAV" | "MS-FP/4.0" | "MS-FP/4.0,DAV" | "DAV ,MS-FP/4.0")

In this case, only the following two protocol mechanisms are listed.

• MS-FP/4.0 refers to Microsoft FrontPage Server protocol version 4.0 enabled on the Web server. Some applications look for this string and use that protocol to communicate with this Web server.

• DAV is used to indicate that WebDAV is enabled on the WebDAV server, and a WebDAV client MAY use WebDAV commands to communicate with this WebDAV server.