allow initial level actions without interactions
change default plan rater to favor less actions
extend graph only with disjoint providing actions

Prevent providing actions in an action provision to share functionality
(interactions, published properties, ...), as it will create plans which
are ambiguous to the user.
implement W3C Widget consuming planner service

The widget consumes the planner services and presents all executable
plans. When the user select a plan, the widget configures a mashup in
the same Apache Rave workspace. The widget then guides the user in
performing the necessary task in order to realize the indented mashup
functionality.