Terry,
The reason for the difference is that originally, neededFeature was in the cofferenceGoal as I felt that would have more of a chance of achieve the right result in a backwards compatible manner. Hence it was split from the other items.
Concerns have been raised about the effectiveness of having the field in conferenceGoal, and hence the editors with a few supporters moved the neededFeatures next to desiredFeatures.
However, my feeling is that this is even less satisfactory than where it was originally (i.e. guarenteed to not achieve the desired effect every time). Therefore, at the moment I intend to recommend removing neededFeatures from SETUP all together.
Therefore, at this stage it is probably best not to include a FeatureSet in SETUP. However, depending on the decisions taken in Geneva, (i.e. if neededFeatures remains where it is in the white paper) then changing to FeatureSet would be more appropriate (it provides consistent parsing and a whole bunch of other benefits etc.)
Hope this helps,
Pete.
============================================= Pete Cordell Tech-Know-Ware pete@tech-know-ware.com +44 1473 635863 =============================================
----- Original Message ----- From: Terry L Anderson tla@LUCENT.COM To: ITU-SG16@mailbag.cps.intel.com Sent: 28 July 2000 17:12 Subject: H.225 white draft
I am looking over the "GenericData" related fields in the ASN.1 and saw one asymmetry. Several commands (e.g., Alerting, ARQ, etc) contain featureSet FeatureSet OPTIONAL while Setup contains neededFeatures SEQUENCE OF FeatureDescriptor OPTIONAL, desiredFeatures SEQUENCE OF FeatureDescriptor OPTIONAL, supportededFeatures SEQUENCE OF FeatureDescriptor OPTIONAL, which with the exception of the replacementFeatureSet BOOLEAN is exactly the contents of FeatureSet. Is there a reason for having these separately in Setup rather than having featureSet in Setup?
--
Terry L Anderson mailto:tla@lucent.com Tel:908.582.7013 Fax:908.582.6729 Pager:800.759.8352 pin 1704572 1704572@skytel.com Lucent Technologies/ Voice Over IP Access Networks/ Applications Grp Rm 2B-121, 600 Mountain Av, Murray Hill, NJ 07974 http://its.lucent.com/~tla (Lucent internal) http://www.gti.net/tla
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