In Eclipse plugins, is there a programmatic equivalence to the markerAnnotationSpecification extension point?

Question

The extension point org.eclipse.ui.editors.markerAnnotationSpecification is used to change how certain user-defined text annotations appear in the editor.

Is there a way to create or modify or override these programatically from a plugin?

Answer 1

See http://www.ibm.com/developerworks/opensource/library/os-ecl-dynext/

It talks about adding extensions programmatically using addContribution().