Comparison with Relational Data Inefficient:tags,which in effect represent schema information,are repeated Better than relational tuples as a data-exchange format Unlike relational tuples,XML data is self-documenting due to presence of tags Non-rigid format:tags can be added Allows nested structures Wide acceptance,not only in database systems,but also in browsers,tools,and applications Database System Concepts-5th Edition,Aug 22,2005. 10.7 ©Silberschat乜，Korth and SudarshanDatabase System Concepts - 5 10.7 ©Silberschatz, Korth and Sudarshan th Edition, Aug 22, 2005. Comparison with Relational Data Inefficient: tags, which in effect represent schema information, are repeated Better than relational tuples as a data-exchange format Unlike relational tuples, XML data is self-documenting due to presence of tags Non-rigid format: tags can be added Allows nested structures Wide acceptance, not only in database systems, but also in browsers, tools, and applications