Wellformed		Text inside this is ignored by XML parser
Schema		This defines the legal elements of an XML document
DTD		This was designed to display data and to focus on how data looks
CDATA		Provides a method to avoid element name conflicts
Root		This was designed to describe data and to focus on what data is
HTML		A language for finding/retrieving information in an XML document
Attribute		XML with correct syntax is called
Sequence		XML which obeys rules in the DTD is
Namespace		An XML based alternative to DTD
XPath		A list of child elements separated by commas is called
Valid		The node where XPath search starts
XML		This provides additional information about elements