VCard4

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vCard 4 is work in progress on an update/replacement to/for vCard 3, RFC 2426.

In many ways vCard4 breaks backward compatibility with vCard3.

In addition, vCard4 appears to be evolving in a different direction from (and in some way incompatibly with) the nascent Portable Contacts standard, which itself evolved incrementally and fairly cleanly/compatibly from hCard which was based on vCard3.

This page documents known vCard4 issues from our analysis of the work in progress, in comparison to hCard/vCard3 and in comparison to Portable Contacts.

Our goal is to encourage vCard4 to converge with Portable Contacts in order to avoid a schism in identity/profile formats on the web.

— Tantek 17:50, 14 August 2010 (PDT)