module REXML
	# A template for stream parser listeners.
	# Note that the declarations (attlistdecl, elementdecl, etc) are trivially
	# processed; REXML doesn't yet handle doctype entity declarations, so you 
	# have to parse them out yourself.
	# === Missing methods from SAX2
	#  ignorable_whitespace
	# === Methods extending SAX2 
	# +WARNING+
	# These methods are certainly going to change, until DTDs are fully
	# supported.  Be aware of this.
	#  start_document
	#  end_document
	#  doctype
	#  elementdecl
	#  attlistdecl
	#  entitydecl
	#  notationdecl
	#  cdata
	#  xmldecl
	#  comment
	module SAX2Listener
		def start_document
		end
		def end_document
		end
		def start_prefix_mapping prefix, uri
		end
		def end_prefix_mapping prefix
		end
		def start_element uri, localname, qname, attributes
		end
		def end_element uri, localname, qname
		end
		def characters text
		end
		def processing_instruction target, data
		end
		# Handles a doctype declaration. Any attributes of the doctype which are
		# not supplied will be nil.  # EG, <!DOCTYPE me PUBLIC "foo" "bar">
		# @p name the name of the doctype; EG, "me"
		# @p pub_sys "PUBLIC", "SYSTEM", or nil.  EG, "PUBLIC"
		# @p long_name the supplied long name, or nil.  EG, "foo"
		# @p uri the uri of the doctype, or nil.  EG, "bar"
		def doctype name, pub_sys, long_name, uri
		end
		# If a doctype includes an ATTLIST declaration, it will cause this
		# method to be called.  The content is the declaration itself, unparsed.
		# EG, <!ATTLIST el attr CDATA #REQUIRED> will come to this method as "el
		# attr CDATA #REQUIRED".  This is the same for all of the .*decl
		# methods.
		def attlistdecl(element, pairs, contents)
		end
		# <!ELEMENT ...>
		def elementdecl content
		end
		# <!ENTITY ...>
		# The argument passed to this method is an array of the entity
		# declaration.  It can be in a number of formats, but in general it
		# returns (example, result):
		#  <!ENTITY % YN '"Yes"'>  
		#  ["%", "YN", "'\"Yes\"'", "\""]
		#  <!ENTITY % YN 'Yes'>
		#  ["%", "YN", "'Yes'", "s"]
		#  <!ENTITY WhatHeSaid "He said %YN;">
		#  ["WhatHeSaid", "\"He said %YN;\"", "YN"]
		#  <!ENTITY open-hatch SYSTEM "http://www.textuality.com/boilerplate/OpenHatch.xml">
		#  ["open-hatch", "SYSTEM", "\"http://www.textuality.com/boilerplate/OpenHatch.xml\""]
		#  <!ENTITY open-hatch PUBLIC "-//Textuality//TEXT Standard open-hatch boilerplate//EN" "http://www.textuality.com/boilerplate/OpenHatch.xml">
		#  ["open-hatch", "PUBLIC", "\"-//Textuality//TEXT Standard open-hatch boilerplate//EN\"", "\"http://www.textuality.com/boilerplate/OpenHatch.xml\""]
		#  <!ENTITY hatch-pic SYSTEM "../grafix/OpenHatch.gif" NDATA gif>
		#  ["hatch-pic", "SYSTEM", "\"../grafix/OpenHatch.gif\"", "\n\t\t\t\t\t\t\tNDATA gif", "gif"]
		def entitydecl content
		end
		# <!NOTATION ...>
		def notationdecl content
		end
		# Called when <![CDATA[ ... ]]> is encountered in a document.
		# @p content "..."
		def cdata content
		end
		# Called when an XML PI is encountered in the document.
		# EG: <?xml version="1.0" encoding="utf"?>
		# @p version the version attribute value.  EG, "1.0"
		# @p encoding the encoding attribute value, or nil.  EG, "utf"
		# @p standalone the standalone attribute value, or nil.  EG, nil
		def xmldecl version, encoding, standalone
		end
		# Called when a comment is encountered.
		# @p comment The content of the comment
		def comment comment
		end
	end	
end