This revision of LEAP puts LEAP under the GNU General Public License.
In addition there are a couple of minor documentation changes.

LEAP - An extendable Relational Algebra RDBMS, (c)1994,1996 Richard Leyton.

Revision History 
================

(B0.10 -> B0.10.1)	22nd May, 1996
------------------

* A number of documentation changes.
* Released under the GNU General Public License (GPL) - Copyright, warranty,
  etc. all reflect that defined within the GNU GPL. See the file COPYING
  for more information.


(B0.9a -> B0.10)	5th March, 1996
----------------

* Multiple data types supported.
* Duplicate tuples are not permitted, and this is enforced
  internally.
* Hash tables are built for each and every relation, and
  stored between runs. All operators have been made more
  efficent as a result of this, previously they built
  their own hash tables. Should make for much more 
  efficent operators and execution.
* An iterative, two stage query parser can be used, which is
  much faster, and will eventually facilitate a query optimiser.
* Data files are character delimited, rather than space 
  delimited. Space delimited files are still supported, but
  all new relations are created with the new format.
* Multiple databases are supported.
* A completely rewritten user manual/instruction guide.
* A preliminary Windows version of LEAP (WinLEAP) appears in 
  the distribution.
* A "create database" operator is supported.
* A small data dictionary is now utilised by LEAP.
* Duplicate attributes are handled consistently.
* A relation/Attribute rename operator is implemented.
* Far fewer file handles are required.
* An optional data cache is implemented.
* Case sensitivity is available.
* Implemented a "duplicate" operator.
* Capitalised data has been removed.
* Fixed a problem with the DISPLAY operator.
* Infix expressions are the default format. Prefix are still supported
  (for now)
* A form for feedback is included in the distribution.
* LEAP has a new home page:
  http://www.brookes.ac.uk/cms/students/richard_leyton/leap.html

(B0.9 -> B0.9a)		September 1995
---------------

* Minor documentation changes to reflect a change in contact
  details.

(B0.8 -> B0.9)		July 1995
--------------

* Infix expressions are fully supported.
* The parser is more robust, and should no longer crash with
  malformed expressions.
* Context sensitive help is available on all operators within
  LEAP, and on key relational concepts. 
* The help file can be changed to suit users needs. eg. 
  Customised for teaching, changed for language.
* CTRL-C no longer crashes the program at a prompt.
* Screen is returned to 80x25 mode at the end and when NORMAL
  is entered. Earlier versions returned to the same mode as
  at startup, which did cause problems after a crash.
* Status information available.
* Timing information is available, and may be switched on/off within LEAP.
* US Time format is supported, and can be switched on/off within LEAP.
* Output copy file can be disabled if required.
* Debug information can be switched on/off within LEAP.
* Wildcards no longer valid in relation names when relation created.
* LEAP no longer crashes if one of the relation files is missing.
* Removed irratating ---> before source files when listed.

(A0.7 -> B0.8) 		May 1995
--------------

* Polite error message if important files not found.
* <> added to expressions.
* Nesting allows the DISPLAY command to print relations.
* Helpfile brought into line in a couple of places.
* "Christened" as LEAP, executable filename changed to tally.
* Documentation.

(A0.6 -> A0.7) 		April/May 1995
--------------

* Nesting of commands supported.
* Relations can be created within the program.
* Tuples can be added to relations within the program.
* No longer bombs out if unknown relation specified in an operator
* Screen size can be adjusted to EGA/VGA 43/50 lines.
* General tidyup of some output
* Memory leaks have been resolved.
* $TEMPDIR$\RARDBMS.TMP file created, mirroring output to screen
* Irratating "Press any key" removed.
* Debug information added to reporting.

(->0.6)  		September 1994 - March 1995
-------
Purely internal revisions. Version A0.6 was the first
version released onto the internet, and provided full
operators, but limited flexibility.
