At 9:20 AM -0700 5/17/02, Rick Wesson wrote: > does anyone know of any server/service that uses ACAP as in rfc2244, i've > seen the cmu pages about it -- just wondering if anyone here knows of any > source available servers, The only source-available servers that I know of are those from CMU, but I believe there are a few commercial servers. > and if or why the protocol never got widely adopted. Adoption has been fairly limited, and mostly in the email area. Part of that may be chicken-and-egg, and part may be that other protocols got more mindshare, and were seen as being close enough that they could be kludged into doing the job. Also, ACAP has three features that, taken together, make it difficult to do a fast server: contexts (searches that remain active and result in asynchronous notification when the results change), access control lists on items, and hierarchy. People who've built servers say it would be much easier if only two of them were required, but the spec makes all three mandatory. There has been some talk of an updated ACAP that relaxes this. Also, there are some potential deployments of ACAP that I've heard of which are pretty interesting.