A glossary of terms for IBM Rational ClearCase use and administration.

This glossary includes terms and definitions for IBM Rational ClearCase.

The following cross-references are used in this glossary:

  • See refers the reader from a term to a preferred synonym, or from an acronym or abbreviation to the defined full form.
  • See also refers the reader to a related or contrasting term.

To view glossaries for other IBM products, go to the IBM Terminology Web site


The combination of an operating system and hardware that makes up the operating environment in which a program runs. Any base of software technologies on which applications or services can be provided; for example, the Eclipse platform.


An object that contains configuration information, activities, and policies required to manage a development effort.

Project VOB (PVOB)

A versioned object base (VOB) that stores Unified Change Management (UCM) objects, such as projects, streams, activities, and change sets.



A request for information from a database based on specific conditions: for example, a request for a list of all customers in a customer table whose balances are greater than $1000.


A ClearCase operation that makes a development work area current with the set of versions represented by a more recent baseline in another stream, usually the project's integration stream or a feature-specific development stream.


An instance of a versioned object base (VOB) located at a particular site.


The removal from VOB and view storage directories of files that are no longer needed.

Snapshot view

A view that uses a local file system to access versions of elements.


An object that specifies configuration rules for a UCM view.


A monitor that specifies one or more standard programs or built-in actions to be executed whenever a certain ClearCase operation is performed.


An object that defines a data structure.

Unified Change Management

A process for organizing software development teams and their work products. Members of a project team use activities and components to organize their work.