[Standards] whiteboarding and shared editing

Peter Saint-Andre stpeter at jabber.org
Fri Aug 10 22:30:14 UTC 2007

In its meeting on Wednesday, the XMPP Council declined [1] to accept the
most recent SVG whiteboarding proposal [2] as a XEP. However, the
Council appreciates the efforts of those who have worked on the
technology underlying that specification, which may provide helpful
experiential input to standards-track work in this domain.

The sense of the Council is that it would be more productive in the long
term to define a generic technology for shared XML editing, similar to a
previous proposal [3]. Such a technology could be used for whiteboarding
with SVG as in a previous proposal [4], but also for shared editing of
other XML formats such as XHTML, Open Document Format (ODF), and Atom.
Limiting the approach to SVG whiteboarding alone will not provide for
re-use of the technology for other applications.

One approach previously explored would be to use the W3C's Remote Events
in XML (REX) technology. [5] Unfortunately, REX has some limitations
that would limit its usefulness for shared XML editing over XMPP, and in
any case is patent-encumbered [6] so could not be used in an XSF

The Council will take it as an action item to investigate shared XML
editing technologies in greater depth. There are challenging issues of
synchronization involved (which would have been partially addressed by
REX), as well as proper layering of the solution so that we can build
multiple applications on top of the editing technology. At its next
meeting the Council will discuss approaches for solving these problems,
which may involve assigning a team or individual to work on solutions
(as we have done in the past, e.g. when Peter Millard was tasked with
working on Publish-Subscribe).

As always, feedback is welcome.



[2] http://www.xmpp.org/extensions/inbox/whiteboard2.html

[3] http://www.xmpp.org/extensions/inbox/sxde.html

[4] http://www.xmpp.org/extensions/inbox/whiteboard.html

[5] http://www.w3.org/TR/rex/

[6] http://www.w3.org/News/2007#item170

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