The Extended Memory (XMS)
Filed Under Definition, Explanation | Posted on September 14, 2009
The extended memory refers to memory above the first megabyte of address space in an IBM PC or compatible with an 80286 or later processor. The term is mainly used under the DOS and Windows operating systems. DOS programs, running in real mode or virtual x86 mode, cannot directly access this memory, but are able [...]
Object Query Language (OQL)
Filed Under Databases, Language, SQL | Posted on September 14, 2009
Object Query Language (OQL) is a query language standard for object-oriented databases modelled after SQL. OQL was developed by the Object Data Management Group (ODMG). Because of its overall complexity no vendor has ever fully implemented the complete OQL. OQL has influenced the design of some of the newer query languages like JDOQL and EJB [...]
Object Definition language (ODL)
Filed Under Design, Language | Posted on September 14, 2009
Object Definition Language (ODL) is the specification language defining the interface to object types conforming to the ODMG Object Model. Often abbreviated by the acronym ODL. This language’s purpose is to define the structure of an Entity-relationship diagram. – Class Declarations * interface < name > {elements = attributes, relationships,methods } – Element Declarations * [...]
