Uniform Resources Locators In the Web,functionality of pointers is provided by Uniform Resource Locators (URLs). URL example: http://www.acm.org/sigmod The first part indicates how the document is to be accessed "http"indicates that the document is to be accessed using the Hyper Text Transfer Protocol. The second part gives the unique name of a machine on the Internet. The rest of the URL identifies the document within the machine. The local identification can be: The path name of a file on the machine,or An identifier(path name)of a program,plus arguments to be passed to the program -E.g.,http://www.google.com/search?q=silberschatz Database System Concepts-6th Edition 9.7 @Silberschatz,Korth and SudarshanDatabase System Concepts - 6 9.7 ©Silberschatz, Korth and Sudarshan th Edition Uniform Resources Locators In the Web, functionality of pointers is provided by Uniform Resource Locators (URLs). URL example: http://www.acm.org/sigmod The first part indicates how the document is to be accessed  “http” indicates that the document is to be accessed using the Hyper Text Transfer Protocol. The second part gives the unique name of a machine on the Internet. The rest of the URL identifies the document within the machine. The local identification can be:  The path name of a file on the machine, or  An identifier (path name) of a program, plus arguments to be passed to the program – E.g., http://www.google.com/search?q=silberschatz