The SVG Terminal Protocol: SVGT/0.2 (revision a)
	Copyright 2006 by Liam Breck

	SVG Terminal home page: http://networkimprov.net/airwrx/awscene.html

	The SVG Terminal module for Firefox implements this protocol.
	This draft published 1 March 2006.


	1. Connection

	1.1 Clients initiate connections on a known, but not neccesarily standard, IP port.
	Clients may receive port information for the host via an ad hoc discovery
	mechanism, such as a local network broadcast.

	1.2 The connection remains open until either side ends the session,
	which may happen without warning, but should be announced by a bye message.


	2. Terminal messages (to host)

	2.1 Commence or terminate a session
		SVGT/0.2 SP inp SP hello|bye CR LF

	2.2 Send keyboard input
		SVGT/0.2 SP inp SP key-type SP key-code CR LF

	2.3 Send mouse input
		SVGT/0.2 SP inp SP mouse-type SP x-pos , y-pos SP target-id CR LF

	2.4 Send pen input
		TBD 


	3. Host messages (to term)

	3.1 Terminate session
		SVGT/0.2 SP upd SP bye CR LF

	3.2 Content update
		SVGT/0.2 SP upd SP size-in-bytes CR LF
		<svg ...> LF
		[list of elements and/or text node updates]
		</svg>

	3.2.1 Elements have the form:
		<tag  id="id" prev|parent="id"                           [attributes]>[children]</tag> LF
		<tag  id="id" prev|parent="id"             [atupdate=""] [attributes]/> LF
		<rect id="id" prev|parent="id" sizeto="id" [atupdate=""] [attributes]/> LF
		<g    id="id" prev|parent="id" tag="text"  [atupdate=""] [attributes]/> LF
		<text id="gid-tid" prev="gid-tid"|parent="gid" [xy=""]   [attributes]/> LF
			children of an element are not checked for SVGT-specific attributes
			atupdate indicates that only attributes should be updated,
				otherwise any children of an existing element are replaced
			<rect ... sizeto="id"> gets the referenced item's BBox() dimensions;
				its width & height attributes set minimums
			<g ... tag="text"> is a container for a set of text elements, one per line
				workaround for Firefox 1.5 which lacks size methods for tspan
			<text ... id="gid-tid"> is a line of text; xy="" places it below the previous line

	3.2.2 Text node updates have the form:
		<text id="id" offset="text-pos|end">text to insert</text> LF
		<text id="id" offset="text-pos" replace="length|all"/> LF (deletion)
		<text id="id" offset="text-pos" replace="length|all">replacement text</text> LF
			text-pos may be found in an embedded tspan (TBI)
		
	3.3 Specify text highlight and caret
		<text id="id" select="x1 y1 x2 y2"            hlid="id" [caret="start|end"] />
		<text id="id" selectrange="text-pos text-pos" hlid="id" [caret="start|end"] /> (TBI)
			hlid identifies highlight object to create/modify

	3.4 Specify wrapping text (creates tspan for each line)
		(SVG1.2 textArea isn't accessible for highlighting)
		TBD

	3.5 Specify insets in wrapping text
		TBD

	3.6 Incrementally update bitmap graphics attached to an image element
		TBD

	3.7 Specify external object; handled outside of DOM (e.g. OLE)
		TBD

	3.8 Set pointer icon
		TBD

	3.9 Play sound
		TBD

	3.10 Request local object (client opens a file dialog and returns its contents)
		TBD