1. Property Registry Rationale
DAV Properties are name, value pairs
Name: a URI (can be a URL)
Value: a sequence of well-formed XML
Advantage: can define new properties without central registration, and without fear of namespace collisions
But, sometimes you want to register properties that will be widely used.

2. Property Registry Contents
Information that needs to be provided for each property:
property name
property semantics
live or dead property (& behavior if live)
property syntax
DTD fragment for contents
BNF for internal syntax of elements (if applicable)
security considerations
contact information for the property maintainer

3. Where to put registry? Some suggestions have been made on the list:
Web site (non-IANA):
Pro: easy to set up, submit properties, find properties
Con: lack of institutional commitment to registry
IANA
Pro: long term institutional commitment
Con: more heavy-weight, harder to set up