Descriptive markup shows the logical structure of the document. A document is viewed as a structure of various types of elements: a book is organized into chapters that contain paragraphs and figures; a magazine is organized into articles that contain paragraphs and photographs, and so on. The user describes what is to be processed rather than how it is to be processed (Coombs et al., 1987). The user of a descriptive markup system need only identify each significant element of the document (such as heading, paragraph, highlighted phrase), assign a mnemonic name (generic identifier) to it, and mark the element in the document using this name. The resulting document will contain information about the component elements and their structural relation.