Handling Attribute Requests by service type. Handling wild cards in Service Deregistration tag lists. For backward compatibility with existing SLPv2 UAs and SAs other features could not be dropped. However, very few SLPv2 DAs have been deployed. Further passive DA discovery would not be needed once such a DA has been discovered, too.
Clients can then infer that the SA can only handle the restricted subset.
The following mandatory features for SAs would be dropped due to the proposed revision. Active DA discovery should be done periodically if no DAs discovered initially. 5.0 Backward Compatibility SLPv2 may be modified to drop features and remain backwardly compatible with the current specification. Only two things need to occur to guarantee this. As new UAs and SAs are deployed, they will not attempt to use the deprecated features.