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Graphics Interchange Format  |  1998-10-01  |  23.9 KB  |  571x341  |  4-bit (4 colors)
   ocr: Object Term Relational comment etm Database Dotobose Object detaboses store objects ond their relaitionships, with support for encapsulation, inheritance, and polymorphism. Relational dofabases store record dota. in two- dimensionial tables, Relotionships between tobles ore constructed with. queres. Class/Extent Table Classes are templatos for objects. A closs can have definitions for attributes: and meihods. Tables use. a row-ond-column structure to hold data, An extent is the sef of oll objects of a particular closs. Object Record An object is on instance of a class. # encapsulates data ond ...