Version range:                    3.0.8 - 2.2.0
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0-5
server protocols:                 1-5

Version range:                    2.1.23 - 2.1.8
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0-4
server protocols:                 1-4

Version range:                    2.1.7 - 2.1.3
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0-3
server protocols:                 1-3

Version range:                    2.1.2 - 2.1.1
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0-2
server protocols:                 1-2

Version range:                    2.1.0
read one version older database:  yes (see NOTE 1)
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0-2
server protocols:                 1-2

Version range:                    2.0.1
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0-1
server protocols:                 1

Version range:                    2.0.0
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0
server protocols:                 0

Version range:                    1.2.7
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no (see NOTE 2)
client protocols:                 0
server protocols:                 0

Version range:                    1.2.6 - 1.2.1
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0
server protocols:                 0

Version range:                    1.2.0
read one version older database:  no
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0
server protocols:                 0

Version range:                    1.1.17 - 1.1.1
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0
server protocols:                 0

Version range:                    1.1.0
read one version older database:  no
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0
server protocols:                 0

Version range:                    1.0.7
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0
server protocols:                 0

Version range:                    1.0.6
read one version older database:  no
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0
server protocols:                 0

Version range:                    1.0.5
read one version older database:  no
save/restore or recover-from-log: no
must rebuild:                     yes
client protocols:                 0
server protocols:                 0

Version range:                    1.0.4 - 1.0.2
read one version older database:  yes
save/restore or recover-from-log: from 1.0.1 onward
must rebuild:                     no
client protocols:                 0
server protocols:                 0

Version range:                    1.0.1 - 1.0.0
read one version older database:  yes
save/restore or recover-from-log: no
must rebuild:                     no
client protocols:                 0
server protocols:                 0

LEGEND:
- read one version older database: specifies whether this version can
  read databases written with the previous version.
- save/restore or recover-from-log: is true if a save of a database
  done by the previous version(s)can be restored and run in this
  version.
- must rebuild: is true if there is no way to use data in databases
  written by previous versions.
- client protocols: is a pair of numbers, min and max, which is the
  range of protocols this client can speak.
- server protocols: is a pair of numbers, min and max. A client of one
  version can talk to a server of another version if the intersection
  of their protocol ranges is non empty.

NOTE 1: version 2.1.0 creates version 9 databases but can read version
     	8 or version 9 database.  See "Upgrading Databases" in the
        AllegroCache reference manual for details.

Note 2: version 1.2.7 databases don't have to be rebuilt but code
     	using doclass or doclass* should be recompiled.