keith moore moorenetworkhereticscom tim bray wrote thu aug 7 2008 1023 keith moore wrote tag fact clearly correct state introduction new uri schemes quite expensive seems depends extent new uri schemes used contexts existing uri schemes used new uri schemes used new contexts applications overly burdensome right theres contradiction lurking probably wouldnt bother use uri syntax unless expected fairly wide utilization benefit plethora existing uriparsing resolving software disagree neither wide utilization ability reuse existing software ever necessary make uris useful compact notation naming resources cases suggesting resources accessed useful right almost networked application even implement uri parsing routines even doesnt utilize http infrastructure also uris mindshare value underestimated people world used dealing level understand limitations notion wanting use uri syntax simultaneously requiring new scheme often symptom fuzzy thinking uris good idea context web hardly surprising might good idea context networked applications specific case xri seems designed extremely generalpurpose thing cost clearly high benefits need compelling havent followed xri enough opinion also recognized overloading uri schemes well overloading http also expensive though different way consequence overloading functionality reduced interoperability suffers got example im trouble thinking problems ive run across could ascribed tim obvious example comes mind protocols tend evolve separately one another even derived common ancestor scopeapplicability protocol likely change time whenever protocol including http adapted application sufficiently removed normal use especially new application attracts lot users implementations tendency tweak original protocol better align new application instance see happened email message headers theyve adapted netnews http requests responses also happened rfc 822 adapted use bitnet uucp networks protocol adapted http http uris used name resources new application interoperability http uris suffer keith _______________________________________________ ietf mailing list ietfietforg httpswwwietforgmailmanlistinfoietf thu 07 aug 2008 143954 0400 new schemes vs recycling http past lc comments draftietfgeoprivhttplocationdelivery08