CORBA 2.3 Glossary (NonStop CORBA 2.3.7+)

deprecated
Possibly available as a feature for upward compatibility of existing applications, but not
recommended for use by new applications.
derived class
An object class that inherits characteristics from another class.
direct TCP server
A NonStop CORBA server that is configured to communicate directly with TCP sockets.
distributed object computing
A style of application in which object-based components distributed across processes or across a
network communicate by using a message-based interface.
dynamic context
Information that must be retained in the memory of a process (as opposed to being saved on disk)
between method calls.
Dynamic Invocation Interface (DII)
A request style in which the client constructs a request at runtime, not needing to know the object
interface (the calling sequences for requesting specific operations) at compile time.
dynamic link library (DLL)
A way of packaging application functions that lets the functions be loaded into a process at
runtime rather than at compile time. Such functions can be unloaded when they are no longer
required in the application while the rest of the application continues to run.
encapsulation
The localization of knowledge within a module. Because objects encapsulate data and
implementation, the user of an object can view the object as a black box that provides services.
Instance variables and methods can be added, deleted, or changed, but as long as the services
provided by the object remain the same, code that uses the object can continue to use it without
being rewritten.
entity object
A type of object that represents external data, such as a database record or an external device.
environment parameter
A CORBA-defined variable included in method invocations to receive exception information.
environment structure
A CORBA-defined variable included in method invocations to receive exception information.
environment variable
An element of a system or product-specific configuration file used to specify the path to a
processing component or to control some aspect of system or product operation. For example, you