Re: [VCARDDAV] Embedding XML in vCard

[Marc Blanchet <marc.blanchet at viagenie.ca>]

Simon Perreault a écrit :
> Dear WG,
>
> Here's a first proposal for embedding XML in vCard, as discussed at IETF 75 in
> Stockholm.
>
> First, I propose that this be part of draft-ietf-vcarddav-vcardxml, not of
> draft-ietf-vcarddav-vcardrev. This is to eliminate mutual referencing, and also
> to eliminate the question of "how do I interpret an XML blob if all I'm
> compliant with is plain vCard?" 

as individual, I agree with the proposal.

as co-chair, I highly suggest that "draft-ietf-vcarddav-vcardrev" 
contains text regarding the XML property and refers to the 
draft-ietf-vcarddav-vcardxml for the details/definition. That way, XML 
is a known property in standard vcard. This will bind the two at RFC 
publication so that they will be referencing each other with their RFC 
numbers, but definitions will not be duplicated.

Marc.

Only XML-aware clients which also happen to
> understand plain vCard would know what to do with an XML blob. Which I think
> makes sense.
>
> The proposal is for a new property named "XML". Example:
>
> BEGIN:VCARD
> VERSION:4.0
> FN:Simon Perreault
> XML:<email>simon.perreault at viagenie.ca</email>
> END:VCARD
>
> That's it.
>
> Details:
>
> - Multiple XML-encoded properties could be present in a single "XML" property,
> e.g. XML:<prop1>...</prop1><prop2>...</prop2>
>
> - Multiple instances of an "XML" property could be present in a single vCard.
> This is so that the order of properties does not change during conversion. Yes I
> know order doesn't matter, but I think it would be nice to have the following
> property hold:
>
> strcmp( vcard(xml("BEGIN:VCARD...END:VCARD")), "BEGIN:VCARD...END:VCARD" ) == 0
>
> - The content of the "XML" property would be an XML chunk with default XML
> namespace being the vCard 4 namespace. The elements allowed there would be those
> that are allowed to be immediate children of the <vcard> element. The normal
> rule for extensibility would apply (i.e. things in unknown namespaces are
> ignored). The chunk would be subject to normal line folding and escaping, i.e:
>   1. Replace all newlines with "\n".
>      (All the rest of the full UTF-8 gamut is untouched.)
>   2. Fold long lines.
>      (Do it after "\n" for bonus points.)
>
> - The following would be implicitly valid:
>
> BEGIN:VCARD
> XML:<!-- All the content is here. -->
> END:VCARD
>
> How about that?
>
> Simon