XPath is a syntax that provides functionality between XSL transformations and XPointer. It deals with parts of an XML document. It is used to manipulate strings, numbers, and Boolean expressions to handle the relevant parts of the XML document. XPath defines the path to a listener for each node type in an XML document. The primary syntactical structure in XPath is the expression. An expression is used to obtain an object that has one of the following four basic types:
- Node-set
- Boolean
- Number
- String
Key words in XPath are not written separately and they are written using lowercase characters. Each node in XML has a unique ID, a typed value, and a string value. Also, some nodes can even have a name. The value written to a node can be zero or atomic value strings. A sequence containing exactly one element is called a singleton. An item is identical to a singular...