Schlaefer / Saito

		);

	function stripLinkDefinitions($text) {

	#

	# Strips link definitions from text, stores the URLs and titles in

	# hash references.

	#

		$less_than_tab = $this->tab_width - 1;

		# Link defs are in the form: ^[id]: url "optional title"

		$text = preg_replace_callback('{

							^[ ]{0,'.$less_than_tab.'}\[(.+)\][ ]?:	# id = $1

							  [ ]*

							  \n?				# maybe *one* newline

							  [ ]*

							(?:

							  <(.+?)>			# url = $2

							|

							  (\S+?)			# url = $3

							)

							  [ ]*

							  \n?				# maybe one newline

							  [ ]*

							(?:

								(?<=\s)			# lookbehind for whitespace

								["(]

								(.*?)			# title = $4

								[")]

								[ ]*

							)?	# title is optional

							(?:\n+|\Z)

			}xm',

			array(&$this, '_stripLinkDefinitions_callback'),

			$text);

		return $text;

	}

	function _stripLinkDefinitions_callback($matches) {

		$link_id = strtolower($matches[1]);

		$url = $matches[2] == '' ? $matches[3] : $matches[2];

	### Footnotes

	function stripFootnotes($text) {

	#

	# Strips link definitions from text, stores the URLs and titles in

	# hash references.

	#

		$less_than_tab = $this->tab_width - 1;

		# Link defs are in the form: [^id]: url "optional title"

		$text = preg_replace_callback('{

			^[ ]{0,'.$less_than_tab.'}\[\^(.+?)\][ ]?:	# note_id = $1

			  [ ]*

			  \n?					# maybe *one* newline

			(						# text = $2 (no blank lines allowed)

				(?:

					.+				# actual text

				|

					\n				# newlines but

					(?!\[\^.+?\]:\s)# negative lookahead for footnote marker.

					(?!\n+[ ]{0,3}\S)# ensure line is not blank and followed

									# by non-indented content

				)*

			)

			}xm',

			array(&$this, '_stripFootnotes_callback'),

			$text);

		return $text;

	}

	function _stripFootnotes_callback($matches) {

		$note_id = $this->fn_id_prefix . $matches[1];

		$this->footnotes[$note_id] = $this->outdent($matches[2]);

	### Abbreviations ###

	function stripAbbreviations($text) {

	#

	# Strips abbreviations from text, stores titles in hash references.

	#

		$less_than_tab = $this->tab_width - 1;

		# Link defs are in the form: [id]*: url "optional title"

		$text = preg_replace_callback('{

			^[ ]{0,'.$less_than_tab.'}\*\[(.+?)\][ ]?:	# abbr_id = $1

			(.*)					# text = $2 (no blank lines allowed)

			}xm',

			array(&$this, '_stripAbbreviations_callback'),

			$text);

		return $text;

	}

	function _stripAbbreviations_callback($matches) {

		$abbr_word = $matches[1];

		$abbr_desc = $matches[2];