Used in the default HTTP header of Tango when returning results. It permits intelligent setting of the user reference cookie, a value that can be used to track user variables.
For more information on user variable tracking, see Chapter 8 of the User's Guide.
If no Tango user reference number was received, either via cookie or search argument, with the current HTTP request, <@USERREFERENCECOOKIE> returns the following:
Set-Cookie: Tango_UserReference=<@USERREFERENCE>; path=/[CRLF]
([CRLF] stands for a carriage return/linefeed (ASCII 13/10) combination.)
If a user reference number was received with the current HTTP request, <@USERREFERENCECOOKIE> returns nothing. Because the cookie has already been set, there is no need to set it again.
This is the content of Tango's default HTTP header for Mac OS versions:
HTTP/1.0 200 OK [CRLF]
Server: WebSTAR/1.0 ID/ACGI [CRLF]
MIME-Version: 1.0 [CRLF]
Content-type: text/html [CRLF]
<@USERREFERENCECOOKIE>[CRLF]
userKey, altuserKey
<@USERREFERENCE>
<@USERREFERENCEARGUMENT>