The om package These topics cover the built-in classes of the om package The DomDocument classThe om.DomDocument class provides methods to manipulate a data tree, following the DOM standards.The DomNode classThe om.DomNode class provides methods to manipulate a DOM node of a data tree.The NodeList classA om.NodeList object hold a list of DOM nodes.The SaxAttributes classThe om.SaxAttributes class holds a set of attributes to process with a SAX reader or writer.The SaxDocumentHandler classThe om.SaxDocumentHandler class provides an interface to write an XML filter with events.The XmlReader classThe om.XmlReader class provides methods to read and process a file written in XML format.The XmlWriter classThe om.XmlWriter class implements methods to write XML to a stream.