Moving here the following proposals:
(with some of the participants in cc).
- «By now Wikipedia has markup/code for everything—math (TeX), parser functions, location maps, and even SVG is supported. However, what is notably missing from many articles (other than high-quality portraits) are graphs and charts.»
- «There are many types of diagrams. The need for collaborative graphics is wide ranging, from map making to biochemical pathways to flow charts to genealogy to general charting. Each type of graphic has or could have a little language, XML or other representation to define graphics of that type succinctly. Whilst all can be presented as .pngs or .SVGs, the more succinct description is necessary for editability.»
This is distinct from bug 43616 (Provide a way to create interactive 2D/3D timelines and infographics e.g. Java applets, AJAX, Flash) in that it's not about *interactive* stuff and that there are some existing extensions which someone should assess and develop for Wikimedia purposes. I'd also leave maps out of it because that's being addressed (at last) elsewhere.
Part of it will be solved by bug 38271, but only to a degree.
Mentioned extensions: [[mw:Extension:Graph]], [[mw:Extension:GnuplotBasic]], [[mw:Extension:Plotters]], [[mw:Extension:WikiPlot]].
Keywords from the proposals: http://bloodgate.com/perl/graph/, Java .jar, Flash .swf, Silverlight .scr, ActiveX .ocx, Vector (.svg) .svg (XML), AnyWikiDraw, AnyWikiDraw, WikiPathways, WikiTex, Graph Plugin, DPL Bundle, TeX, gluplot, pgfplots.