2009-09-21  Wakaba  <wakaba@suika.fam.cx>

	* Document.pm (title, get_or_create_graph_node): New methods (made
	from codes moved from main.pl).

2009-09-20  Wakaba  <wakaba@suika.fam.cx>

	* Graph.pm (schelling_update): Implemented.

2009-09-20  Wakaba  <wakaba@suika.fam.cx>

	* Graph.pm (add_nodes): Improved the way to determine the number
	of added nodes.

2009-09-14  Wakaba  <wakaba@suika.fam.cx>

	* Document.pm (prop): New method.
	(content_media_type): Changed to return the real media type.
	(to_xml_media_type, to_text_media_type, to_xml, to_html_fragment):
	Changed to return appropriate default value.

2009-09-14  Wakaba  <wakaba@suika.fam.cx>

	* Document.pm: Added |rebless| method family.  Moved
	SWML-to-HTML/XML/text convertion methods to another module.

	* Document/: New directory.

2009-09-14  Wakaba  <wakaba@suika.fam.cx>

	* Document.pm (to_html_fragment): New method.

2009-09-14  Wakaba  <wakaba@suika.fam.cx>

	* Document.pm (to_xml, to_text): New methods.

2009-07-12  Wakaba  <wakaba@suika.fam.cx>

	* Document.pm (new_id): New method.

2009-07-12  Wakaba  <wakaba@suika.fam.cx>

	* Document.pm (update_tfidf): New method copied from main.pl.

2009-07-12  Wakaba  <wakaba@suika.fam.cx>

	* Document.pm: New module.

2009-03-16  Wakaba  <wakaba@suika.fam.cx>

	* Repository.pm (are_related_ids): Repeat the relearning process
	until the right answer is deduced.

2009-03-16  Wakaba  <wakaba@suika.fam.cx>

	* Repository.pm: New module.

2009-03-15  Wakaba  <wakaba@suika.fam.cx>

	* Node.pm (document_id): New method.

2009-03-15  Wakaba  <wakaba@suika.fam.cx>

	* Graph.pm (get_node_by_id): New method.
	(create_node): Changed to instantiate SWE::Object::Node.

	* Node.pm: New module.

2009-03-15  Wakaba  <wakaba@suika.fam.cx>

	* Graph.pm: New module.

2009-03-15  Wakaba  <wakaba@suika.fam.cx>

	* ChangeLog: New file.