What are the steps necessary to parse XML documents?

• Create a instance of DocumentBuilderFactory Object (newInstance() method).
• Reference to DocumentBuilder object using newDocumentBuilder() method of DocumentBuilderFactory.
• Reference to Document object of the xml file to be parsed by using DocumentBuilder.parse(File xmlfile) with File object as argument
• start using Document object to get the elements of the xml file using getElementsByTagName(),getElementsByName() 

Step 1 - Install a library that parses XML documents appropriate for the language you are using.

Step 2 - Use the library's API, as specified by its documentation, to parse XML

Step 3 - ...?

Step 4 - Profit