ATTRIBUTE		A preferred style sheet language of XML.
NAMESPACE		Provides a method to avoid element name conflicts.
XSL		A language for transforming XML documents.
CDATA		Text inside this section is parsed by parser
XSLT		A famous XML editor
SCHEMA		A language for defining parts of an XML document.
PCDATA		This was designed to display data and to focus on how data looks.
XMLSPY		This defines the way an XML document can be accessed and manipulated.
WELLFORMED		This defines the legal elements of an XML document.
DOM		This was designed to describe data and to focus on what data is
DTD		XML with correct syntax is
XPATH		An XML based alternative to DTD.
XML		These provide additional information about elements.
HTML		Only text inside this section is ignored by the parser