I think Matthew Hutchinson wrote:
g'day everyone,
when it comes to sotrage of rules and facts, how are most people handling
it? Are you using JessML? Also, has anyone been storing the JessML in a
database?
I don't think too many projects are using JessML yet, although I
expect that many
I think Lakshmi Vempati wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
I am trying to use defadvice (before reset and after clear) and I
noticed the following problem:
If reset (or clear) is invoked via a a programmatic call to the reset
(or clear) method defined in the
I'd call that a bug, yes. Thanks.
I think Yura wrote:
Don't know whether it's a bug but after
(deffunction fun () (assert (b 2)))
(defrule rule (logical (a))=(assert (b 1)))
(defrule rule2 (logical (a))=(fun))
(assert (a))
(run)
(retract 0) deletes only (a) and (b 1). (b 2) doesn't
I think erich.oliphant wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hi,
I am trying to figure out the best way to have a rule fire only for a fact
whose slot value is the min or max of a group of facts.
Match a negated pattern to the (nonexistent) fact in which some
number is
I think =?iso-8859-1?Q?H=FCbner?= wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hello everybody,
I need a hint from you. When I try to retract a fact, all other facts are
reactivated.
...
Can somebody tell me what's wrong with the code?
You've got a bunch of rules with the
I think Daniela CLARO wrote:
MAIN::installer-barreaux-metallique: =1=1=1=1+t
MAIN::installer-barreaux-metallique1: =1=1=1=1+t
What actually this means for Jess?
Internally, Jess breaks rules containing the or conditional element
into multiple rules. In general, you shouldn't worry about
I think Hector Urroz wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Thanks for the response. It does seem a bit odd to automatically and
silently modify code. Why not throw an exception? Is this done elsewhere in
Jess? What is the rationale? Did I stumble onto a reserved rule
I think Vageesh Setty wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Website seems to be down for a while.. is
http://herzberg.ca.sandia.gov/jess/docs/70/programming.html right URL?
It's OK now. Thanks.
-
Ernest
I think erich.oliphant wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
(if (eq ?effRate nil) then
;;(dts-log-error No effective rate found for (call
com.ngc.dts.util.DateUtils formatDateTime ?pddate))
return )
That return is just the symbol return, not the
Several people have reported that there was a problem with the
distribution file for the trial version (only) of Jess 7.0b5. The
symptom is basically that the JessDE just doesn't work. The licensed
download is unaffected. I've corrected the problem and posted a new
binary. If you've been having
I think ROSSEL, Olivier (CIMPA) wrote:
I am using Jess with Protege. I want to write a rule that says: run
when you get an oject FOO with a non-empty slot called 'name' and
where there is no fact foo with property bar equal to the slot
value. I would intuitively wirte that this way:
I think Matthew Hutchinson wrote:
Just a conceptual question... since starting with Jess, it always seemed to
me generally you have the rules established first, then load in facts which
in turn trigger these rules. No problems there. But is it proper to
consider having the facts already in
I think Hariprasath Manivannan wrote:
- Has anyone faced this issue with Jess5.0? If so please send the possible
solutions.
Jess 5.0 is unsupported. The last release of any version of Jess 5 was
5.2 in June, 2000; that's over five years ago. Jess has evolved
considerably since then, and many
I think [EMAIL PROTECTED] wrote:
Am I wrong to say that the 'misfeature' mentioned below hasn't made it
into a feature yet in the latest release 7.0 b4?
Is there any plan to still add it in time for 7.0 final?
I've written defadvice for every numeric Jess-function (+, -, *, /, , =,
, =,
I think Dona Mommsen wrote:
On MacOS X, Eclipse will crash with error:
Can't start the AWT because Java was started on the first thread. Make
sure StartOnFirstThread is
not specified in your application's Info.plist or on the command line
Yes, I can reproduce this on my Powerbook.
Hi,
In Jess 7.0b3, the default for definstance type changed from dynamic
to auto. If you specified dynamic as the last argument to
definstance, then Jess would try to register itself with your Bean as
a PropertyChangeListener; this used to be the default, so that you had
to write static if you
I think Yura wrote:
[Charset koi8-r unsupported, filtering to ASCII...]
Hi jess-users
JessDE doesn't parse this rule (saying: 'TRUE' is a symbol, not an integer):
(defrule rule (declare (salience (+ 1 1))) = )
whereas Jesp makes no complaints.
Yep. I can reproduce this and now that you
I think Yura wrote:
I'm sorry - it's there in the manual. I should be more attentive.
By my calculation, you've reported 4 bugs, and 3 of them were real --
so you're batting .750 . Seems like an excellent average to me!
-
Ernest
I think erich.oliphant wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hmm, ok thanks, I understand better now. However, jess.Userfunctions return
Value's so is there anything I can do in that case to activate the type
conversion? I tried Value.resolve() but that did not help.
I think erich.oliphant wrote:
I tried that function, but it doesn't seem to exist on the
jess.ReflectFunctions class (I am using 7.0 beta 4. There seems to be a a
static Value a(Class, Object) throws JessException method based on browsing
the class file. Could this be it?
You're not using
Most likely the problem is that some of your classes (perhaps
com.ngc.dts.domain.common.PerDiemEntitlement) have mutable hash codes,
making them unsuitable for use as keys in a hash table (try using one
of these objects as a key in a HashMap, change the values of some
properties, then try to look
I think Yura wrote:
I'm receiving the Editor couldn't be initialized when trying to open
clp-files in Jess70b4-editor (yes, I tried the -clean switch). Jess70b3
works well. Can anybody help?
JessDE 7.0b4 now requires Eclipse 3.1 -- the sudden changeover with
this particular version wasn't
I think Jeffrey Davine wrote:
Perhaps the place to ask this question is the Constantine Planning Wiki -
but would it be difficult in the next version of Jess to implement a
hierarchical template structure?
...
(deftemplate Individual extends LegalAgent
OK, let's get in the time machine...
I think Roger Studner wrote:
Is there (I read something 'akin' to this in the mailing archive) a big
performance hit as well?
I like to use beans/shadow facts for a variety of reasons, but have always
been under the impression that when i'm going to assert a 'huge' number of a
particular
There's no tutorial guide or anything like that. The basic procedure
is very easy: implement the jess.Strategy interface, then use
(set-strategy classname) to load it into Jess. There's really just
the one compare() method to write; it's supposed to implement the
spaceship operator (ie.,
I think Roger Studner wrote:
v = new Value(l, RU.SYMBOL);
...
v = new Value(i, RU.SYMBOL);
For the record, note that both of these lines will throw exceptions at
runtime. To contstruct an RU.SYMBOL from a numeric type, you have to
convert the value to a String yourself and pass that String to
Jess's usual representation for arrays is a Jess list -- is that what
you're looking for? There isn't a public API built into Jess for
turning an array into a List, but now that you're pointing out the
need, it seems like a good addition. For now, though, your obj2array
function is the best way
I think Jeffrey Davine wrote:
I'll do the research, but as a general matter, do you think the Jess API
exposes enough information (particularly concerning the rete tokens) so that
I could write such a tool?
Alan's more optimistic, but I myself don't think this can really be
done at the level
along at home, is
[EMAIL PROTECTED] Jess]$ cvs diff -r 1.5 -r 1.6 jess/Node1MTMF.java
Index: jess/Node1MTMF.java
===
RCS file: /home/ejfried/cvsroot/Jess/jess/Node1MTMF.java,v
retrieving revision 1.5
retrieving revision 1.6
diff -r1.5
I think =?iso-8859-1?Q?=5BEXTERN=5D_Manuel_Kollmu=DF?= wrote:
Isn_t it possible to assert a variable as a fact or a variable fact?
like this:
(bind ?var number1)
_.
(assert (?var))
No, the type of the fact must be known when the call to assert is
compiled. You can use an extra level of
I think mauricio rincon wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hi...
I have a problem with OR (v) operator. I_m using this operator in a rule,
that should be fired only once when both of the conditions happened . The
problem is that if both events are happening, the
I think Steve Solomon wrote:
This is a minor complaint. Why can't one use nil to match an empty list?
Short answer: because Jess inherited its basic rule language semantics
from CLIPS, and that's how it works in CLIPS.
Only the pattern (sprocket ?id) matches (sprocket 2) with no following
I think Matthew Hutchinson wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
G'day everyone,
This is more of an Eclipse question, however, I only get this error when
trying to open CLP files. Eclipse with Jess has been working fine for weeks,
and now suddenly Eclipse completely
I think Matthew Hutchinson wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hi,
Actually, I have already got the full version from Craig and it works fine.
Also, my classpath and eclipse stuff is all set to the full version jar file
also.
Good, but be that as it may, one can
I think [EMAIL PROTECTED] wrote:
(defrule rule1
(x1 value1 ?cf1)
(x2 value2 ?cf2)
(x3 value3 ?cf3)
=
(assert (x3 value3 (min ?cf1 ?cf2 ?cf3)))
Perhaps this rule should retract or modify the existing fact, rather
than asserting a second one, as this does?
I think Roger Studner wrote:
(defrule count-icd9-codes
?c - (accumulate (bind ?count 0) ;; initializer
(bind ?count (+ ?count 1)) ;; action
?count ;; result
(encounter (code ?c : (eq ?c 440)))
)
...
This (and anything in the accumlates match
I think Jon Weygandt wrote:
it looks like modifying a fact sometimes requires the equivalent of:
For each slot modified
{
Retract the fact
Set the slot
Assert the fact
}
Yes, more or less. Special versions of retract and assert can be
used to cut a few corners in this
I think Jon Weygandt wrote:
Jess,
That's her picture on the cover of Jess in Action :)
(TRANS_STATE ?trans_state SI | MI | EI)
My procedural view would be the pattern is evaluated as:
(TRANS_STATE (?trans_state SI) | MI | EI)
And if the match for SI fails, not sure what
I think Roger Studner wrote:
(deftemplate employee
(slot salary))
(deffacts employee-facts
(employee (salary 1007700))
(employee (salary 1002347700))
(employee (salary 107712000))
)
(watch all)
(reset)
(defrule count-highly-paid-employees
?c - (accumulate (bind ?count 0) ;;
I think Daniela CLARO wrote:
However I have more two questions, the first one I thought that (reset)
clear my knowledge base, I mean, my facts, rules, all things and actually it
doesn't. What is the command I can use to clear my knowledge base?
There's a chapter entitled The Jess Function
I think [EMAIL PROTECTED] wrote:
How can I convert a string into a symbol?
In Java,
String string = whatever;
Value symbol = new Value(string, RU.SYMBOL);
In Jess,
(bind ?string whatever)
(bind ?symbol (sym-cat ?string))
-
I think Jonathan Sewall wrote:
However, in Jess v7.0b4, ppdefrule omits the (data ) pattern from
its output. Is our simpler syntax for testing multislots
unsupported? Many thanks,
Seems to work as ever; this is apparently just a bug in the
pretty-printer. Thanks for the report.
Hi Folks,
We're pleased to announce the availability of the latest release of
Jess, the rule engine for the Java platform, at the usual location:
http://herzberg.ca.sandia.gov/jess/download.shtml
This release adds a lot of polish to Jess 7 as we approach the final
version. There are a number
I think David Firmin wrote:
I'm trying to use deffacts with a specific module, but am having some
problems changing out of that module once the deffacts has taken place.
At present, I'm doing the following (although I've simplified the code
here, the sense remains the same):
I'm afraid
I think Scott Moss wrote:
The order in which rules are fired depends first on the conflict
resolution strategy, but if two rules are of equal priority by that
criterion, then they'll fire in an arbitrary order that just falls out
of the Rete network implementation. That order is affected by,
I think Daniel B. Davis wrote:
All browsers I have tested show the navigation items on the web site as
too small to read.nbsp; These include:
ul
liMozilla Firefox 1.0
liNetscape Navigator 7.1
liInternet Explorer 6.0
/ulThese are the ones high on the left-hand side of the page, rendered
in
I think Semmel, Glenn S wrote:
I looked at the source files and noted the following differences:
70b3's compare() ends with:
return ((String) o1).compareTo(o2);
Whereas 70a4's compare ends with:
return ((String) o1).compareTo((String) o2);
Interesting! If you look at the
I think Fred Janon wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
I am reading the Jess in Action book and noticed that it lists
exists as a Jess' CEs but I could not find it in the online doc for
version 6.1.
It's here, in chapter 2:
I think Henrique Lopes Cardoso wrote:
(defrule r1
?x - (foo)
=
(bind ?string (implode$ ?x)) ;; IS THERE A WAY OF DOING THIS?
?x is a jess.Fact object. You can call any of the methods of jess.Fact
on it -- including toString() and toStringWithParens(), one of which
I think Florian Fischer wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hello,
I am using Jess in a multithreaded environment...
I need to understand how Jess works in a multithreaded environment.
Is the following description correct?
- One lock is on all the data (facts,
Ultimately, of course, a Fact is an array, with one element for
each slot. When you compile a rule, the rule compiler will look up the
names of any slots that are mentioned, and it's the index of the slot
that gets compiled into the rule.
On the other hand, fact-slot-value is a function that has
I think Semmel, Glenn S wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hello. Under Jess 7.0a4, the TextAreaWriter class has the following
attribute:
private static final int MAXSIZE = 3
In a future release, can this attribute be changed to be either a user
I think =?iso-8859-1?Q?=5BEXTERN=5D_Manuel_Kollmu=DF?= wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
hi
is it possible to read out informations from a *.dll and to handle the
return value (string)?
Sure, in the same way you'd do it from any Java program: you wrap the
DLL
I think Dusan Sormaz wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
I was able to run it in 7.0a6.
I am curious, what is the interpretation of and in this example? Is it AND
of 4 items? or only 2?
2. It means that there's not a (bar ?x) fact where ?x is the fact (a b c).
Hmmm, OK, I see. This is a known issue which has (as another poster
pointed out) been dealt with in Jess 7. In Jess 6, the workaround is
to reverse the order of these patterns:
(not
(and
?b - (a b c)
(foo (bar ?b))
)
)
I think Henrique Lopes Cardoso wrote:
I think Jim Goodwin wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Are you interested in bug reports? Where do I send them?
Very interested. You can send them to this list or directly to me at
[EMAIL PROTECTED]
Is further work on the JessDE active right now?
Absolutely.
In the first screenshot, I see an editor window named awtdraw.clp,
but I don't see a file by this name in the navigator view; my guess,
then, is that you've used the Eclipse File | Open... menu to
try to open a file not in your workspace. This doesn't work. You can
only edit .clp files that are
I think nikita berdikov wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hello,
I'm new to Eclipse and JESS, so can anyone tell me how
to start working with JESS in Eclipse 3.1. What
variables should i set? I did everything that is
written in Using the JessDE, but something is
I think Matthew Hutchinson wrote:
So it's not a complete waste, is the following line still the reccomended
way of loading rules from Java?
engine.executeCommand((batch jess_test.clp));
In Jess 7, there's a Rete.batch() method you can use instead;
otherwise, what you've shown works fine.
I think Eunice Palmeira wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hello,
I have a problem when i try run Jess with Protigi:
JessTab: Note that the PAL engine is not currently installed in Protege.
(The JessTab PAL-integration functions are not available.)
Well,
You're right -- that's not the correct behavior. Thanks for the
report.
I think Yura wrote:
[Charset koi8-r unsupported, filtering to ASCII...]
Hi
I think there is a bug in the 'for'-loop implementation. The following code
returns '1' (incorrect):
(bind ?x 1)
(for (bind ?i 1) ( ?i 2)
I think erich.oliphant wrote:
Hi,
We are using the JSR-94 interface but would like to use JessDE for
debugging,etc. Will jessDE support the XML formatted files required by the
JSR-94 interface ?
There are two JSR94 drivers. There's the reference implementation that
comes with the JSR94
I think David Firmin wrote:
I'm trying to create shadow facts that subclass a deftemplate that's
already been added to the Rete. When I try and add the java bean using
definstance I get a ClassCastException as follows:
java.lang.ClassCastException
at
I think Bogdan Werth wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hello everybody,
I working on the model from the field of social simulation. I am
using RePast and Jess to make my agents think in a declarative way. At
the moment I have a separate Jess instance for every agent
Hi Erich,
First, let me mention that I'm happy to see someone using the
brand-new static imports feature -- the thing that lets you use
(CarClass.MINI) as a constant.
Second, your code looks fine except that the defclass defines a short
template tag RentalCarReservation, but the rules are using
I think Henrique Lopes Cardoso wrote:
So, if I understood correctly, facts can only be asserted in the module
where their templates are defined
Yes.
Therefore, if I have a template defined in MAIN, I cannot create a fact
based on that template in another module.
Right.
Another
I think robert fields wrote:
Classes are loaded from java by
Jesp j = new Jesp(new StringReader((defclass {Role,
...} package.{Role,})), aEngine);
j.parse(false);
The Rete class has a defclass method which would be much more
convenient to use! Barring that, it also has an
Jess doesn't have an explicit else-if feature; if you put an if into
the else of another if, then that second if is a separate
function call, so it needs its own parentheses.
If I may, I will point out a few other things here: You don't need to
spell out the names of any classes in java.lang, as
I think Krasnigor, Scott L (N-AST) wrote:
I have an ID slot defined for the Bean object used to define the facts
but can't seem to figure out how to get the fact that triggered the rule
so I can modify it for this particular case (all my other rules allow
pattern binding).
I formatted your
Hi Folks,
I am pleased to announce that version 6.1p7 of Jess, the rule engine
for the Java platform, is now available for download at the usual
place:
http://herzberg.ca.sandia.gov/download.shtml
This is a bug fix release with some improved performance
characteristics. From the change log:
I think Steffen Luypaert wrote:
The basic trick is this:
From one rule, set up the GUI to ask a question, then call
((engine)
waitForActivations), which pauses the (run) thread until a new rule
is
activated.
The problem is that waitForActivations will still fire the
I think Steffen Luypaert wrote:
Hi all,
No backward chaining will occur for patterns inside a conditional
element. I was wondering that this will change in a future version of
Jess, especially for the logical conditional element.
This is basically an oversight in the rule compiler;
I think Chintan Shah wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Can you please provide the fully qualified server name in the url.
http://www-i4 does not work for anybody outside your DNS.
It the same as his email;
I think Michael Knapik wrote:
;;(call event setConditionCodeId )
Variables always have a ? in their name:
(call ?event setConditionCodeId )
(modify 2 (conditionCodeID ))
Slot names are case-sensitive:
(modify 2 (conditionCodeId ))
I think Michael Knapik wrote:
(defrule report-subject-and-event-status
?s - (subject (subjectId ?sId) (caseStatusId ?csId))
?e - (event (eventId ?eId) (conditionCodeId ?ccId)(eventDescriptor ?evtDescriptor))
=
(modify ?e (conditionCodeId ))
(printout t * Event ?eId has a condition
I think Greg Biegel wrote:
[Charset iso-8859-1 unsupported, filtering to ASCII...]
Hi,
Is there a way to pass a reference to the current instance of the rule
engine from Jess, to a Java object. I tried using the 'this' keyword, but
doesn't seem to work. So basically, I would like to
I think Maxim Tretyak wrote:
Hi
Can I get advantages of jess.Console by such a way:
Jess (new jess.Console Hi (engine))
External-Address:jess.Console
Console is appearing, but connand line input is transmitted directly to
output text area, without interaction with Rete.
Very clever!
I think Douglas Pearson wrote:
For example if I had:
(defrule simple-rule
(child (id ?x) (name ?name))
(parent (id ?y) (child ?x))
=
(printout t Child ?x name ?name crlf)
)
and I know fact-3 and fact-7 were matched...how can I tell
(programmatically) which fact
I think Lakshmi Vempati wrote:
I am using a simple defquery to find a fact and then modify it.
For reasons that are too difficult to go into (although we've actually
discussed it before on this list) when you get a jess.Fact out of a
jess.Token (as you do when you're working with a query
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