New DOM modules by Level (updated)

The W3C DOM specification is partitioned in a set of modules
Release versions of the DOM specification by W3C are called levels.
The table below shows which new modules appeared in each Level. Each higher level contains all modules of previous  levels.
Note: DOM Level 2 also introduces namespaces.

Level 1	Level 2	Level 3
Core	XML	Xpath
HTML	Views	Validation
	Range	Load and Save
	Traversal	Asynchronous Load
	Stylesheets	Mutation Name Events
	CSS	UI Events
	CSS2	Text Events
	Events	Keyboard Events
	User Interface Events
	Mouse Events
	Mutation Events
	HTML Events

Modules can be optional and can have different W3C recommendation statusses. You can check if your implementation supports a module using DOMImplementation.hasFeature(module, level) or Node.isSupported(feature, version) . Append ".0" to the level number (e.g. "3.0" for Level 3). Use null or empty string if any level will do.

Setting the JAXP validation file (updated)

A JAXP parser validates (version >= 1.2) by default using a DTD. Here are some variations that can be used when validating

• If you are using SAX and obtained this parser from the SAXParserFactory:

javax.xml.parsers.SAXParser parser

• To validated using a schema (xsd) add this line of code to your parser setup:

parser.setProperty("http://java.sun.com/xml/jaxp/properties/schemaLanguage", 

  XMLConstants.W3C_XML_SCHEMA_NS_URI); 

• To specify the schema file in your code (for both DTD and XSD) add this line to your parser setup:

parser.setProperty("http://java.sun.com/xml/jaxp/properties/schemaSource", 

  new File("checkers.xsd")); 

              SL-385.B: add to code 3-2 after line 17   

• The source can be a File, InputStream, InputSource or an Object array containing these types

• If you are using DOM, and you created this DocumentBuilderFactory instance :
  

javax.xml.parsers.DocumentBuilderFactory builder

• To validated using a schema (xsd) add this line of code to your parser setup:

builder.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaLanguage", 

  XMLConstants.W3C_XML_SCHEMA_NS_URI);

• XMLConstants.W3C_XML_SCHEMA_NS_URI = http://www.w3.org/2001/XMLSchema

The corresponding constant for DTD (the default) in these cases is  

• XMLConstants.XML_DTD_NS_URI = http://www.w3.org/TR/REC-xml

• To specify the schema file in your code (for both DTD and XSD) add this line to your parser setup:

builder.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaSource", 

  new File("checkers.xsd"));