RFC 2227            Hit-Metering and Usage-Limiting         October 1997


11 Acknowledgments

   We gratefully acknowledge the constructive comments received from
   Anselm Baird-Smith, Ted Hardie, Koen Holtman (who suggested the
   technique described in section 8), Dave Kristol, Ari Luotonen,
   Patrick R. McManus, Ingrid Melve, and James Pitkow.

12 References

   1.  Bradner, S.,  "Key words for use in RFCs to Indicate Requirement
       Levels", BCP 14, RFC 2119, March 1997.

   2.  Anwat Chankhunthod, Peter B. Danzig, Chuck Neerdaels, Michael
       F. Schwartz, and Kurt J. Worrell.  A Hierarchical Internet Object
       Cache.  Proc. 1996 USENIX Technical Conf., San Diego, January,
       1996, pp. 153-163.

   3.  Daniel W. Connolly.  Proposals for Gathering Consumer
       Demographics.
       http://www.w3.org/pub/WWW/Demographics/Proposals.html.

   4.  Fielding, R., Gettys, J., Mogul, J., Nielsen, H. and T.
       Berners-Lee, "Hypertext Transfer Protocol -- HTTP/1.1," RFC 2068,
       January, 1997.

   5.  Phillip M. Hallam-Baker.  Notification for Proxy Caches.  W3C
       Working Draft WD-proxy-960221, World Wide Web Consortium,
       February, 1996. http://www.w3.org/pub/WWW/TR/WD-proxy.html.

   6.  Holtman, K., and A. Mutz, "Transparent Content Negotiation in
       HTTP", Work in Progress.

   7.  Mogul, J., "Forcing HTTP/1.1 proxies to revalidate responses",
       Work in Progress.

   8.  Thomas P. Novak and Donna L. Hoffman.  New Metrics for New Media:
       Toward the Development of Web Measurement Standards.  This is a
       draft paper, currently available at http://
       www2000.ogsm.vanderbilt.edu/novak/web.standards/webstand.html.
       Cited by permission of the author; do not quote or cite without
       permission.

   9.  James Pitkow.  In search of reliable usage data on the WWW.
       Proc. Sixth International World Wide Web Conference, Santa Clara,
       CA, April, 1997.







 
RFC 2227            Hit-Metering and Usage-Limiting         October 1997


   10. Joseph Reagle, Rohit Khare, Dan Connolly, and Tim Berners-Lee.
       Privacy and Demographics Overview.
       http://www.w3.org/pub/WWW/Demographics/.

   11. Linda Tauscher and Saul Greenberg.  Revisitation Patterns in
       World Wide Web Navigation.  Research Report 96/587/07, Department
       of Computer Science, University of Calgary, March, 1996.
       http://www.cpsc.ucalgary.ca/projects/grouplab/
       papers/96WebReuse/TechReport96.html.

   12. Wessels, D., and K. Claffy "Internet Cache Protocol (ICP),
       version 2", RFC 2186, September 1997.

13 Authors' Addresses

   Jeffrey C. Mogul
   Western Research Laboratory
   Digital Equipment Corporation
   250 University Avenue
   Palo Alto, California, 94305, U.S.A.

   EMail: mogul@wrl.dec.com
   Phone: 1 415 617 3304 (email preferred)


   Paul J. Leach
   Microsoft
   1 Microsoft Way
   Redmond, Washington, 98052, U.S.A.

   EMail: paulle@microsoft.com