Namespaces in DOM

• DOM Level 2 methods are namespace aware:

  public Element createElementNS(String namespaceURI, String qualifiedName)
   throws DOMException
  public Attr createAttributeNS(String namespaceURI, String qualifiedName)
   throws DOMException
  public NodeList getElementsByTagNameNS(String namespaceURI, String localName)

  These set all four properties: node name, local name, namespace URI, and prefix.

• DOM Level 1 Methods are not namespace aware:

  public Element createElement(String tagName) throws DOMException;
  public Attr createAttribute(String name) throws DOMException;
  public NodeList getElementsByTagName(String tagname);

  These set the node name only. The local name, namespace URI, and prefix are all null.

• Unlike SAX, DOM does include namespace declaration attributes such as xmlns="http://ns.cafeconleche.org/Orders/" and xmlns:xlink="http://www.w3.org/1999/xlink" in lists of attributes.

• Provide a namespace URI and full prefixed name when creating elements and attributes in a namespace

• Use local name and URI when searching for an element or attribute

• Serialization is tricky, and not all implementations get the namespace declarations in the right place.