December 1999
Intermediate to advanced
992 pages
22h 3m
English
Although the logical structure of DTDs is very important for establishing the relationships between pieces of information, it's the physical structure that determines how XML document data is stored. An XML document is divided into storage units called entities, which serve as the physical building blocks from which documents are constructed. Like other structural components of a document, entities are declared in the DTD. XML uses two fundamental types of entities: parsed and unparsed. Unparsed entities can't be parsed by XML parser, so they rely on notations in order to be processed.
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