Nested Data Types Hierarchical data is common in many applications JSON:JavaScript Object Notation ·Videly used today XML:Extensible Markup Language Earlier generation notation,still used extensively Database System Concepts-7th Edition 8.6 ©Silberscha乜，Korth and SudarshanDatabase System Concepts - 7 8.6 ©Silberschatz, Korth and Sudarshan th Edition Nested Data Types ▪ Hierarchical data is common in many applications ▪ JSON: JavaScript Object Notation • Widely used today ▪ XML: Extensible Markup Language • Earlier generation notation, still used extensively