You know what?

A content-dictionary as can be found by tons on http://www.openmath.org/cd/ is mostly a social artifact. It’s a set of descriptions of symbols so that one can mean what others means.

Rendering Content Elements

Rendering Agent at Work

A rendering agent is a processor that, on behalf of a user, for example through an HTTP request, converts content-mathematical-expressions to presentation. We call this conversion, the delivery of the rendering agent. Typically, the delivery is happening within a user-interaction which lives within a context: information about this context can be multiple, it includes the preferred languages of the user, the preferred notational styles of the user or of the surrounding content. A rendering agent should be able to process arbitrary content

Maple has an option to export content-mathml in html export… it’s a horrible thing packed inside an applet parameter within an html4 document but there are still hopes to parse this with htmlparser and expand the MathML-content elements off the parameters.