elements of xml file system..

EVERY VALID XML DOCUMENT MUST ALWAYS HAVE ONE SINGLE ELEMENT THAT ENTIRELY ENCLOSED ALL THE OTHER ELEMENTS IN THE DOCUMENT.THIS ELEMENT IS CALLED THE �ROOT� ELEMENT.

ELEMENTSTHAT ARE DIRECTLY CONTAINED WITHIN THE ROOT ELEMENT ARE SAID TO BE �NESTED� WITHIN THE ROOT ELEMENT.FURTHER ELEMENTS CAN BE NESTED WITHIN THOSE ELEMENTS TO FORM A SHORT OF HIERARCHY.

AN ELEMENT THAT IS ENCLOSED BY ANOTHER ELEMENT IS CALLED A �CHILD� OF THE CONTAINING ELEMENT.CONVERSELY THE CONTAING ELEMENT IS CALLED THE �PARENT� O FTHE ENCLOSED ELEMENT.

IN THE CODE SHOWN BELOW THE ROOT ELEMENT IS NAMED �PERSONNEL� .THE PERSONNEL ROOT ELEMENT CONTAINS TWO CHILD ELEMENTS THAT ARE EACH NAMED �ENTRY�.EACH ENTRY ELEMENT ENCLOSED ITS OWN CHILD ELEMENT CALLED �NAME� THAT CONTAINS SOME CONTANT DATA.