>1. An extension to the vCard format to represent relationships (maybe this already exists? can you embed RDF triplets in vCard?)
There is FOAF ("friend-of-a-friend", based on RDF). At the moment, this is mostly provided by websites (such as identi.ca), but could also be transferred via E-Mail.
There might be some way to embed FOAF into vCard, but why should be care? E-Mail allows for more than one attachment ...
There is FOAF ("friend-of-a-friend", based on RDF). At the moment, this is mostly provided by websites (such as identi.ca), but could also be transferred via E-Mail.
There might be some way to embed FOAF into vCard, but why should be care? E-Mail allows for more than one attachment ...