This document covers the recent major user-visible changes to the DOME
Library.

Version 5.2.1 (March 1999)
-------------

* The property editor has been enhanced to use a more user friendly
  multi-layer tabbed widget.

* Plug in functions may now be registered with DOME through the Plug-Ins
  tab of the Tools->Options tab.

* Two new menu entries have been added: Layout->Nodes->Equalize Widths and
  Layout->Nodes->Equalize Heights.  These equalize the widths or heights
  of the selected nodes.

* The for-each-with-separator Alter procedure has been added which
  functions in a similar manner to for-each.

* Various defects were corrected.

Version 5.2a (January 1999)
------------

* Linux now uses /usr/bin/lpr for printing and ghostview for viewing pdf
  files.

* Fixed a defect that prevented users from modifying DOME Tool
  Specification Alter methods.

Version 5.2 (January 1999)
-----------

* Upgraded to use ObjectShare VisualWorks 3.0.

* The MetaScribe document generation system was added.  This allows for the
  quick and easy creation of new kinds of document generators.  Refer to
  the MetaScribe appendix in the DOME Guide manual.

* The CyberDOME tool was added.  This tool allows for the creation of a new
  notation by simply creating an example model.  CyberDOME is under
  development and the documentation has not been completed.  See the DOME
  web pages for more information on CyberDOME.


Version 5.1 (October 1998)
-----------

* The progress meter is now displayed on the DOME launcher or the graph
  that is being edited rather than in a separate window.

* Every object now has a pop-up menu with at least three default entries:
  Rename, Properties, and Go Down.  Menu entries that are not currently
  applicable are disabled.

* New tools may now be associated with DOME via the Tools->Options dialog
  available from the launcher.  Users may add new tool directories which
  are searched for DOME related files such as DOME Tool Specifications,
  Alter files, and document registration files via the Misc panel.  A tool
  directory is expected to follow the following layout: registration files
  are placed in the 'etc' directory, Alter files are placed in the 'lib'
  directory, and DOME Tool Specifications are placed in the 'specs'
  directory.  The tool directories settings are maintained across sessions.
  In addition, a Tools->Reset Tool Caches menu entry has been added to the
  launcher that allows the user to flush the caches so new specs,
  registration files, and alter files are found by DOME without having to
  restart DOME.

* A DOME Tool Specification now supports the specification of a Load File
  which is loaded when a ProtoDOME model is created or loaded.  The load
  file should contain Alter code.  The Alter file is searched for using the
  normal Alter load path and loaded, if necessary, when a ProtoDOME model
  is created (or loaded) from that DTS.

* Transient properties are now supported.  A user may now define a property
  that is not saved with the model by setting the property to be transient.
  These are most often used with code generators and document generators.

* Properties may now have guard and post actions associated with them.
  Both of these are specified as Alter methods on a MetaDOMEProperty.  The
  guard method takes in three arguments: the object being modified, the
  property being set, and the new value.  The guard method should return
  true, meaning that the set operation should be allowed, or false, meaning
  don't allow the set operation to take place.  False is assumed if neither
  true nor false are returned.  The post action method takes in four
  arguments: the object being modified, the property being set, the new
  value, and the old value.  The return value of the post action is
  ignored.