The websites in the government sector often provide Word files containing flowcharts. They are simple flowcharts with at most ten nodes in size, showing common workflows to people. There are several problem with this: downloading a separate file and opening it in a separate application is a pain. File is in proprietary format and is big. Lastly it is not friendly to search engines.
I thought of using image files instead, however this will be difficult to modify later on (for them at least), plus it is not index-able.
Are there other approaches to this? I have thought of PDF but still does not like how chunky it is. I have also thought of SVG but I do not know it well enough to say anything constructive.
An example would be this Word document