When you run the validateDOM project, you should get the following output:
Validating DOM... XMLDoc is not valid because Element content is invalid according to the DTD/Schema. Expecting: pub_date. Validating all //book nodes, one by one ... <book> (0) is a valid node <book> (1) is not valid because Element content is invalid according to the DTD/Schema. Expecting: pub_date. Validating all children of all book nodes, //book/*, one by one ... <author> (0) is a valid node <title> (1) is a valid node <genre> (2) is a valid node <price> (3) is a valid node <pub_date> (4) is a valid node <review> (5) is a valid node <author> (6) is a valid node <title> (7) is a valid node <genre> (8) is a valid node <price> (9) is a valid node <review> (10) is a valid node
The next topic describes how to use the onReadyStateChange property.