ContentHandler Interface specifies the callback methods that the SAX parser uses to notify an application program of the components of the XML document that it has seen.

• void startDocument() - Called at the beginning of a document.

• void endDocument() - Called at the end of a document.

• void startElement(String uri, String localName, String qName, Attributes atts) - Called at the beginning of an element.

• void endElement(String uri, String localName,String qName) - Called at the end of an element.

• void characters(char[] ch, int start, int length) - Called when character data is encountered.

• void ignorableWhitespace( char[] ch, int start, int length) - Called when a DTD is present and ignorable whitespace is encountered.

• void processingInstruction(String target, String data) - Called when a processing instruction is recognized.

• void setDocumentLocator(Locator locator)) - Provides a Locator that can be used to identify positions in the document.

• void skippedEntity(String name) - Called when an unresolved entity is encountered.

• void startPrefixMapping(String prefix, String uri) - Called when a new namespace mapping is defined.

• void endPrefixMapping(String prefix) - Called when a namespace definition ends its scope.