The idea is an user can upload a *.bpmn file to a
wike.
Well, for the wiki part of the job, it seems that what you want is just
a modified version of the Graphviz extension. This extension converts
DOT notation to PNG images (using a supplied converter), manages a cache
of the results, and supplies the image when the graph is requested. So,
if you have a suitable BPMN-to-image converter, and moderate PHP skills,
adapting the Graphviz extension should be fairly easy.
I guess the problem is finding or writing a BPMN-to-image converter.
Like ImageMagick, such a converter wouldn't be specific to MediaWiki; so
this might not be the best place to ask for that.
Another tack might be to write a BPMN-to-DOT converter, then just use
Graphviz.
Hope this helps (but probably not much),
Ian Smith
