Re: [VCARDDAV] How to encode X-Properties in XML?

[Cyrus Daboo <[e-mail]>]

Hi Simon,

--On March 8, 2010 10:10:13 AM -0500 Simon Perreault 
<[e-mail]> wrote:

> The main open issue we have for vCard XML is that of encoding
> X-Properties in XML. vCard uses X- for unregistered extensions, while
> vCard XML uses XML namespaces. It's not clear how to automatically
> convert from one to another.
>
> A proposal: Create an XML namespace for X- properties. Put the content
> into a <text> element.
>
> Example:
>
> X-FOO:bar
>
> would translate into:
>
> <foo xmlns="urn:ietf:params:xml:ns:vcard-4.0:xname"><text>bar</text></foo>
>
> We don't need to add anything to the schema since we already specify that
> an XML vCard parser MUST ignore elements in namespaces it doesn't
> recognize. (Maybe we can add text to force it for this namespace.)

The choice we made for icalendar-in-xml was to simply allow the X- 
properties to appear as <x-...> elements in the default "icalendar" 
namespace. It did not seem worthwhile to have a special namespace for those 
as in reality they are processed in exactly the same way as regular 
properties. The key thing is that these elements/properties cannot be 
ignored. They are there for a purpose (be it only "experimental").

-- 
Cyrus Daboo