perm filename CNVR.DOC[RUT,LSP] blob sn#343721 filedate 1978-03-22 generic text, type T, neo UTF8
The  CONNIVER  system  (CNVR)  is  essentially  as  described  in the
CONNIVER REFERENCE MANUAL as available from the MIT AI Lab (Memo  No.
259A).   When  the system is started you are talking to the top level
of CONNIVER, with the data base already  initialized.   There  is  an
INITFN  in  effect  (CNVINT) which takes you back to the top level of
CONNIVER whenever an error return to the top level of  LISP  is  made
(including  a  ↑G or ↑C ↑D pair).  You may temporarily return to LISP
via (STOP), but any subsequent errors will start CONNIVER  up  again.
The  only  way  to  permanently  disable  CONNIVER  is  thus to do an
(INITFN NIL).

CONNIVER CEXPRs may be defined via CDE (which is equivalent to CDEFUN
as described in the manual) and edited via EDITC, which is similar to
EDITF in its operation.  Named CONNIVER  DATUMs  may  be  edited  via
EDITD  -  this is especially useful for editing METHODs.  Both CEXPRs
and METHODs may be printed via PP, but if dumping to a file note that
METHODs  have  to  be ADDed.  They will be ADDed automatically if the
function CDUMP is used to dump them:  (CDUMP  (FILE.EXT))  dumps  all
CEXPRs  and DATUMs currently defined into the file in such a way that
they will be restored when the file is loaded.  If only the CEXPRs or
DATUMs  are  desired, CDUMP may be given a second argument specifying
which of the two to dump (CEXPR or DATUM).  The CDUMP file  uses  the
function  DATA  to  re-ADD the DATUMs to the net.  DATA reads until a
NIL is encountered, adding all atoms read as METHODs,  adding  '(EXP)
when  a  list  of  the form ((EXP)) is read, and evaluating all other
expressions and adding the resultant value.

Note  that  when  CONNIVER  is  running  the QUOTE macro character is
changed  from  "@"  to  "'".   "@"  is  now  used  to  indicate  LISP
evaluation.  Note also that all strings are interned by CONNIVER, and
that " appearing in the middle of an atomic symbol  is  no  longer  a
break  character.   It should also be noted that ";" reads in as "!",
so that ;>X and !>X are equivalent (but the former is easier to  type
than the latter).

If  you need to reinitialize the data base (via DATA-INIT) you should
be aware that binary program space will be  consumed  and  you  might
have  to  expand  bps  first  (via EXPBPS).  Note also that the ILISP
functions DELETE and ENTER are re-defined in CNVR -  they  have  thus
been renamed *DELETE and *ENTER.

Finally,  although there is no trace facility in CONNIVER, (TRACE /:)
will give you a good indication of the flow of control.