ents or be fulfilled by one or more EconomicEvents.  A Commitment references both a provider Agent and a receiver Agent, although it can be planned temporarily without both provider and receiver if there is a committed Agent assumed or immediately expected as part of planning. If it defines a ProcessSpecification stage, then the flow expects a resource at that stage of production.</p>
<h4 id="vfagreement">vf:Agreement</h4>
<p>An Agreement is a purposefully abstract term, so that it can represent many existi