Resource: in this context, we refer to an information resource - data that resides on a computer, not an actual physical entity.
Configuration: a resource that identifies a set of revisions, versions, and/or states of some other resources (the workgroup is to determine if configuration can contain other configurations). In some systems, a configuration identifies an exact set of resources selected by the entity that created the configuration, as well as their versions; in other systems, a configuration may identify the state of a fixed set of resources, not limited to a client-determined set.
Configuration management: the practices of managing configurations, their contents, their lifecycles - in particular, identifying and controlling changes to configurations.
Baseline: an immutable configuration, that is, a snapshot in time of the state of a set of resources, including the links from those resources. For systems where a configuration does not identify a client-determined set of resources, a baseline may add that property.
Version: a resource that indicate a specific state of another resource
