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domain - as the spec says "a complete runtime configuration, potentially distributed over a series of interconnected runtime nodes."
In Tuscany there may (not yet in 2.x) or may not be a centralized representation of the domain. We have a domain registry (currently just
embodied in the endpoint registry) that provides an interface for accessing information about the domain.
domain uri - the unique identifier of the domain. May or may not contain parameters to configure the domain.
domain name - Not sure but I would say domain uri minus any attached configuration parameters, i.e. the bit after the ? (see http://en.wikipedia.org/wiki/URI_scheme#Generic_syntax)
node - the domains representative in a class loading space
node factory - creates nodes, associates them with domains and configures them
installed contribution - contribution who's resources are available for use in the domain (in a node)
deployed composite - composite that's deployed into the domain level composite (in a node)
domain registry - an interface that nodes use to share domain level information
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