<s>
CorVision	B-Language
is	O
a	O
fourth	O
generation	O
programming	B-General_Concept
tool	O
(	O
4GL	B-Language
)	O
currently	O
owned	O
by	O
Attunity	O
,	O
Inc	O
.	O
CorVision	B-Language
was	O
developed	O
by	O
Cortex	O
Corporation	O
for	O
the	O
VAX/VMS	B-Operating_System
ISAM	B-Application
environment	O
.	O
</s>
<s>
Although	O
Cortex	O
beta	O
tested	O
CorVision-10	O
which	O
was	O
generated	O
for	O
PCs	O
but	O
CorVision	B-Language
itself	O
stayed	O
anchored	O
on	O
VMS	B-Operating_System
.	O
</s>
<s>
CorVision-10	O
proved	O
more	O
difficult	O
than	O
hoped	O
,	O
and	O
was	O
never	O
released	O
.	O
</s>
<s>
CorVision	B-Language
can	O
be	O
traced	O
back	O
to	O
1972	O
when	O
Lou	O
Santoro	O
and	O
Mike	O
Lowery	O
created	O
INFORM	O
for	O
the	O
newly	O
formed	O
time-sharing	B-General_Concept
company	O
Standard	O
Information	O
Systems	O
(	O
SIS	O
)	O
.	O
</s>
<s>
INFORM	O
contained	O
some	O
of	O
CorVisions	B-Language
basic	O
utility	O
commands	O
such	O
as	O
SORT	O
,	O
REPORT	O
,	O
LIST	O
and	O
CONSOLIDATE	O
.	O
</s>
<s>
Between	O
1976	O
and	O
1977	O
Ken	O
Levitt	O
and	O
Dick	O
Berthold	O
of	O
SIS	O
ported	O
INFORM	O
from	O
the	O
CDC-3600	B-Device
to	O
the	O
PDP-11/70	B-Device
under	O
IAS	B-Application
.	O
</s>
<s>
Using	O
this	O
new	O
investment	O
,	O
Cortex	O
ported	O
INFORM	O
to	O
Digital	O
Equipment	O
Corporation	O
's	O
new	O
VAX/VMS	B-Operating_System
,	O
adding	O
compiled	O
executables	B-Application
.	O
</s>
<s>
In	O
1986	O
the	O
name	O
of	O
Application	O
Factory	O
was	O
dropped	O
in	O
favor	O
of	O
the	O
name	O
CorVision	B-Language
.	O
</s>
<s>
Between	O
1986	O
and	O
1989	O
CorVision	B-Language
experienced	O
its	O
heyday	O
.	O
</s>
<s>
The	O
addition	O
of	O
relational	B-Application
database	I-Application
support	O
attracted	O
major	O
accounts	O
.	O
</s>
<s>
In	O
1992	O
,	O
CorVision	B-Language
Version	O
5	O
was	O
released	O
with	O
Query	B-Language
and	O
support	O
for	O
Unix	B-Application
.	O
</s>
<s>
Query	B-Language
allowed	O
read-only	O
access	O
by	O
users	O
and	O
developers	O
to	O
a	O
systems	O
database	O
backend	O
.	O
</s>
<s>
In	O
1993	O
Cortex	O
started	O
supported	O
vesting	O
to	O
Digital	O
's	O
new	O
64-bit	B-Device
Alpha	B-Device
line	O
.	O
</s>
<s>
As	O
early	O
as	O
1987	O
,	O
Cortex	O
recognized	O
the	O
growth	O
in	O
the	O
popularity	O
of	O
the	O
IBM	O
PC	O
,	O
supporting	O
wikt:diagrammatic	O
editing	O
of	O
menus	O
and	O
data	O
relationships	O
in	O
CorVision	B-Language
.	O
</s>
<s>
In	O
1997	O
ISG	O
's	O
work	O
on	O
CorVision-10	O
which	O
was	O
to	O
herald	O
the	O
rebirth	O
of	O
CorVision	B-Language
onto	O
the	O
IBM	O
PC	O
platform	O
stopped	O
.	O
</s>
<s>
CorVision-10	O
was	O
proving	O
very	O
difficult	O
to	O
port	O
and	O
ISG	O
finally	O
refused	O
to	O
spend	O
any	O
more	O
money	O
on	O
the	O
now-dated	O
system	O
.	O
</s>
<s>
1994	O
saw	O
the	O
last	O
innovative	O
CorVision	B-Language
release	O
:	O
V5.11	O
.	O
</s>
<s>
The	O
extra-fee	O
Y2K	B-Error_Name
release	O
,	O
V5.12.2	O
,	O
marked	O
the	O
end	O
of	O
development	O
.	O
</s>
<s>
CorVision	B-Language
still	O
exists	O
in	O
a	O
handful	O
of	O
companies	O
that	O
have	O
not	O
yet	O
found	O
the	O
time	O
or	O
money	O
to	O
upgrade	O
their	O
existing	O
mainframe	O
systems	O
.	O
</s>
<s>
As	O
CorVision	B-Language
runs	O
on	O
the	O
VMS	B-Operating_System
environment	O
it	O
is	O
very	O
stable	O
but	O
the	O
search	O
for	O
CorVision	B-Language
developers	O
and	O
contractors	O
to	O
support	O
these	O
ageing	O
systems	O
is	O
a	O
problem	O
.	O
</s>
<s>
Since	O
around	O
1999	O
,	O
companies	O
have	O
started	O
appearing	O
offering	O
conversion	O
tools	O
to	O
convert	O
BUILDER	O
code	O
to	O
compiled	O
Visual	B-Language
Basic	I-Language
and	O
Java	B-Language
.	O
</s>
<s>
In	O
2005	O
CorVision	B-Language
guru	O
Michael	O
Lowery	O
,	O
now	O
president	O
of	O
Order	O
Processing	O
Technologies	O
,	O
attempted	O
to	O
revive	O
the	O
CorVision	B-Language
franchise	O
with	O
CV2VB	O
,	O
a	O
process	O
to	O
convert	O
CorVision	B-Language
applications	O
into	O
.NET	B-Language
applications	O
using	O
a	O
SQL	B-Language
server	O
.	O
</s>
<s>
CV2VB	O
is	O
OPT	O
's	O
third	O
generation	O
CorVision	B-Language
conversion	O
and	O
replacement	O
modeler/code	O
generator	O
.	O
</s>
<s>
It	O
is	O
in	O
commercial	O
service	O
at	O
former	O
CorVision	B-Language
clients	O
.	O
</s>
<s>
The	O
first	O
step	O
in	O
developing	O
an	O
application	O
with	O
CorVision	B-Language
is	O
to	O
fill	O
in	O
the	O
parameters	O
which	O
control	O
the	O
miscellaneous	O
aspects	O
concerning	O
application-wide	O
functions	O
.	O
</s>
<s>
Development	O
parameters	O
which	O
affect	O
the	O
CorVision	B-Language
working	O
environment	O
.	O
</s>
<s>
CorVision	B-Language
however	O
allows	O
for	O
these	O
setting	O
to	O
be	O
changed	O
at	O
any	O
time	O
during	O
development	O
.	O
</s>
<s>
CorVision	B-Language
keeps	O
the	O
information	O
behind	O
the	O
Status	O
Screen	O
up-to-date	O
so	O
that	O
it	O
indicates	O
the	O
current	O
state	O
of	O
the	O
development	O
process	O
.	O
</s>
<s>
CorVision	B-Language
provides	O
a	O
useful	O
feature	O
called	O
Field	O
Search	O
.	O
</s>
<s>
To	O
provide	O
complete	O
specification	O
details	O
in	O
hardcopy	O
form	O
,	O
CorVision	B-Language
has	O
the	O
Run	O
Reports	O
option	O
.	O
</s>
<s>
The	O
key	O
to	O
CorVision	B-Language
is	O
PROCEDURES	O
.	O
</s>
<s>
The	O
procedures	O
in	O
CorVision	B-Language
eventually	O
become	O
Executable	B-Application
Images	O
(	O
.EDO	O
'	O
s	O
)	O
.	O
</s>
<s>
You	O
can	O
look	O
upon	O
the	O
screen	O
procedure	O
as	O
the	O
MAIN	O
procedure	O
which	O
is	O
called	O
MAIN	O
by	O
default	O
in	O
CorVision	B-Language
.	O
</s>
<s>
A	O
Procedure	O
of	O
this	O
type	O
is	O
written	O
entirely	O
in	O
BUILDER	O
,	O
the	O
CorVision	B-Language
4GL	B-Language
.	O
</s>
<s>
CorVision	B-Language
keeps	O
the	O
data	O
structure	O
files	O
separate	O
if	O
they	O
are	O
to	O
be	O
manipulated	O
by	O
BUILDER	O
.	O
</s>
<s>
This	O
is	O
a	O
major	O
strength	O
of	O
CorVision	B-Language
allowing	O
for	O
a	O
prototyping	O
environment	O
where	O
both	O
code	O
and	O
data	O
structures	O
can	O
be	O
changed	O
throughout	O
development	O
then	O
brought	O
together	O
at	O
compile	O
time	O
.	O
</s>
<s>
.DCL	B-Operating_System
:D	O
IGITAL	O
command	O
language	O
file	O
.	O
</s>
<s>
Define	O
specific	O
CorVision	B-Language
logicals	O
.	O
</s>
