Hi all,
It is 2 days I am fighting with a strange behaviour of insertLogical in rules
having from pattern in conditions : it works the first time, and not after ...
-
Here is my use-case (simplified) :
I have a class that represent a Flight. A Flight
Forgot to say : using drools 5.6.FINAL
- Mail original -
De: Vincent LEGENDRE vincent.legen...@eurodecision.com
À: Rules Users List rules-users@lists.jboss.org
Envoyé: Jeudi 28 Août 2014 15:28:49
Objet: [rules-users] Inconsistent behaviour of insertLogical in rules having
from
Hi
Guvnor implements a REST API that can be used to get a big DRL from ressources
in a package.
Most of time in my company's projects we used this API to get and store DRL
files in a production environnement, with some dedicated code (no maven nor web
in prod).
It is almost as simple as
I have personnaly 2 ways of getting as far as possible from refactor problems
:
- mostly use flat objets, ie some objets that are as DB tables (only simple
POJO with foreign keys, no child objects). This way it is easy to get and store
used objects (with SQL or JPA frameworks, which has some
.
thanks to all for your help!
2013/4/10 Davide Sottara dso...@gmail.com
That rule style requires
dialect mvel
to be declared either at the rule level or globally in the DRL file,
do you have that?
Davide
On 04/10/2013 08:41 AM, Vincent LEGENDRE wrote:
blockquote
I am
I am not that drools eclipse plugin is able to see DRL types if they are
defined in a separate DRL file.
But if your app works well, it is only that.
If the type is really missing, you should encounter errors at runtime (when
feeding the knowledge base)
- Mail original -
De: Stefan
May be that the extends problem also comes from the fact that the rules are
in separated files, and/or the order which they are given to the kbuilder (base
rules must exists prior to rules exntending them).
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Hi Raphael,
There are multiple concerns mixed here, I don't know if this post would benefit
of being cutted in at least 2 :
1- How drools works : read about RETE algorithm (wikipedia is a good start) and
about drools-expert (core module that contains the engine, first chapter of the
doc
Hi
I did not get the use case here.
When you write :
The Problem : I have an optimisation engine that can allocate some activities
to some resources, while optimizing some KPIs (Key Performance Indicator).
The optimizer takes as input (among others) a list of forbiden allocations
that
Hi
You should look at drools-planner and n-queens sample :
http://docs.jboss.org/drools/release/5.5.0.Final/drools-planner-docs/html_single/#d0e914
- Mail original -
De: Andreas Höhmann andreas.hoehm...@gmx.de
À: rules-users@lists.jboss.org
Envoyé: Samedi 8 Décembre 2012 19:04:19
Objet:
It is not a myth ... but indeed, it's hard.
Most of times, you have to find one guy at client's side who is ready to learn
at least the main principles of expert-systems. For my experience, it works
well enough (ie most of rules dev time is done by the BA) in about 1 proj out
of 3. For the
It may be faster to get the drools source code and change the generation by
yourself.
And post the new code to Edson ...
- Mail original -
De: Jean-Paul Shemali jshem...@hotmail.com
À: rules-users@lists.jboss.org
Envoyé: Mardi 11 Septembre 2012 08:29:08
Objet: Re: [rules-users] Guvnor
Ok, not simple indeed ...
And why can't you generate a POJO instead of declarative fact ?
- Mail original -
De: Jean-Paul Shemali jshem...@hotmail.com
À: rules-users@lists.jboss.org
Envoyé: Lundi 10 Septembre 2012 10:06:43
Objet: Re: [rules-users] Guvnor Declarative Model
Simply by not
How can you declare your facts (or rules) if you don't know beforehand the
structure of the POJO to use ?
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a workaround could be to use a java pojo, not a declared fact
- Original Message -
From: Edson Tirelli ed.tire...@gmail.com
To: Rules Users List rules-users@lists.jboss.org
Sent: Friday, September 7, 2012 3:43:04 PM
Subject: Re: [rules-users] Guvnor Declarative Model
Ouch, more
If it works with salience, why change ?
And why is the order so important ? Still trying to get the first occurence of
an event of a given type/value ?
It remembers me some not-so-old post ...
- Mail original -
De: salt writemesaltwo...@gmail.com
À: rules-users@lists.jboss.org
Are you sure that this specific jar/class does not depends of other external
(from java/drools point of view) classes ?
Does it work if you download the generated DRL, and compile/run it outside
Guvnor ?
- Mail original -
De: devan vanreenen devan.vanree...@gmail.com
À:
But it may be a horse anyway ...
Let's say Anatolia is this list, and the horse the initial post.
According to all the jobs available for that kind of profile around the world,
it can be the first of a very long bunch of junk mails proposing a job that
anyone here can find within a week ...
Hi,
You must make a difference between facts and other objects (that you can get
by bindings).
facts are the objects inserted in the working memory. Only those objects can
be matched directly in LHS. Other entities can be accessed by using attributes
(of facts) bindings or from constructions
The learning is : for your case, where all your row in your table have an
implicit priority and business logic, yes, don't hope that drools engine will
guess that by itself.
As far i understand, you expect the rules to trigger from top to bottom (or
most specific to less), and stop when a
I expected only new facts to be evaluated as I'm running stateful session
It only works this way if you let your session alive in a separate Thread,
using fireUntilHalt().
If you use fireAllRules() (by instance each 5s), then yes, everything will be
re-evaluated, just as if it were a new
If you do nothing heavy in the RHS, indeed, rules' action part execution is
faster than fact insertion, but this is because of your design, not something
relevant for all usages.
In an inference system using RETE like drools, the most of time is spent to
update the RETE network. Updates of
I agree with Wolfgang on it is common sense to have audit logs for a real
application, and of course the way to do it with listeners.
Most of time, for my experience, these logs (which rule has triggered, what are
the changes made (insert, retract, update...) ...) are simply dumped in the
did you check here :
http://drools.46999.n3.nabble.com/please-provide-a-rule-for-events-timeout-cases-td3907955.html
- Mail original -
De: dunnlow dunn...@yahoo.com
À: rules-users@lists.jboss.org
Envoyé: Vendredi 10 Août 2012 16:19:33
Objet: [rules-users] Best design pattern for:
Hi
I was wondering why you need the otherwise here.
May be it is only because you have simplified your sample, but the table you
sent is like a truth-table telling what currency can be converted for a
particular account.
So, as you have a 2 state answer, you can simply add rules to specify the
May be something with the internal clock and timestamps assigned as events
dates and inclusive (or not I don't remember) bounds in after/before operators
evaluation ... in short, I am not sure of the expected result if all your event
(or 2 among your 3 events) have the same event date.
But
I had the same strange problem some time ago (last winter), but I never managed
to reproduce a small sample
I checked, and my problematic class hierarchy also lived in different packages
(and never tried that that for my smaller samples) .
- Mail original -
De: Joerg Henne
Never managed to get that working properly too ...
3 options :
- Try again to really share the model from global area to all package.
- Put the jars in Guvnor classpath (or tomcat classpath)
- Write a REST client that upload the jar to all packages.
- Mail original -
De: starfish15
, or does it take place into another third-party framework (that
could use a different or modified version of drools).
org.tass.utils.ExpertSystemManager.java is our class. We aren't using
third-party
framework.
Thank you
Carolina
2012/7/23 Vincent LEGENDRE vincent.legen
@Vincent: I'm concerned about the first stack trace line, which is
where no executable code can be. Clear this up first...
Me ? Really no idea why this line ...
This line, in 5.3 code, is the class declaration. Indeed, node an executable
piece of code ...
I've found another thread :
Our application is using this url:
http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/org.dfms.model/LATEST
to loading from Guvnor5.3.0 the pkg. Is it correct?
Yes, to get the compiled package, compiled inside Guvnor , but this is the
problem here.
The compiled package is
are you sure that your SituationManager.createAccessControlEvent method
returns something not null ?
- Mail original -
De: Carolina Pellecchia carolina.pellecc...@gmail.com
À: Rules Users List rules-users@lists.jboss.org
Envoyé: Lundi 23 Juillet 2012 12:44:28
Objet: Re:
There is another mystery : why this is working when getting rules from a DRL
file and not from Guvnor ...
Did you add the POJO model into the Guvnor's package ?
But if this is it, package compilation should raise a compilation error ...
What is sure is that the problem does not comes from the
predicate type column allow you to write anything, using $param placeholder
to retrieve your cell's content.
- Mail original -
De: abhinay_agarwal abhinay_agar...@infosys.com
À: rules-users@lists.jboss.org
Envoyé: Jeudi 19 Juillet 2012 13:39:40
Objet: [rules-users] Web guided
or create a false setter in your POJO and modify it ... by instance by giving
it the agenda-group you want to focus ...
- Mail original -
De: Michael Anstis michael.ans...@gmail.com
À: Rules Users List rules-users@lists.jboss.org
Envoyé: Jeudi 19 Juillet 2012 14:39:44
Objet: Re:
... and don't forget the 'Cleanup trigger' cleanup rule too ...
You can also do that kind of rule without 'Cleanup trigger', using a very low
salience, or specific agenda-group or ruleflow-group.
But if you really retract ALL facts, it will be far much faster to create a new
kSession (not a
up to drools 5.1 (more or less), the new default is jbpm flows, for rules or
not.
JBPM let you do what you can do with former .rf files.
To be shorter : It is the same, at least seen from a ruleflow usage.
Before you ask : you need to add jbpm jars to your drools runtime in order to
make the
Yep, but this is because the sample is quite old now.
If one day they decide to get rid with .rf files, it's better to start using
jbpm format.
Oh yeah, sample should be upgraded too ...
- Mail original -
De: paco fifi_nji...@yahoo.fr
À: rules-users@lists.jboss.org
Envoyé: Mardi 26
@gqmulligan : ... hum, you're rigth, Globals does not expose much ... use
kSession.setGlobal(...) in a try catch if you want to stick to the API.
@wolfgang : agreed ...
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...
Should I repeat what Geoffrey told you in your previous thread ?
Will you try again and again to post your project, hoping we will do your work
for you ?
I gave you the main ideas, first work with that, and come back with precise
questions.
- Mail original -
De: Ricardo
I am not sure to have fully understood you last requirement, nor if you set the
global inside or outside the rules.
Anyway, I see these options :
- declare your globals for all packages, but it seems that this is not what
you want
- enclose the global setting in a try...catch and just
I am not sure to understand your problem exactly, and espacially chat you
intend to do, but it is likely because you don't declare the suitable criterion
so the solution you have (could help if you post it too) is equivalent
(according to the score you define) to the expected one...
If I try
To me, the problem discussed in this thread highlights a deeper problem (more
than DT compile time) : using DT as data storage is bad.
Wolfgang's post demonstrate this fact.
Previous posts demonstrate another problem : having 50k, 100k rules with the
very same (basic) structure demonstrate
You could probably also consider simplifying the rule structure... many - if
not all - the evals and explicit getters seem unneeded.. that would make the
rule more efficient and definitely more readable.
... and will potentially protect against null usage in operations, like the
operation
Did you really send a 50k rows table to a personal email ??? I can't believe it
...
I think you should :
- read the mailing list rules
- read the previous Wolfgang post telling that you should consider not using
such big tables (consider a rule using your 50k rows as parameters)
- ask
fail gracefully, with an error
message such as after umpteen zillion rules: out of memory and not just turn
belly-up.
After having received some feedback from the OP about alternative approaches
I'll report back to the list.
-W
On 18 June 2012 19:26, Vincent LEGENDRE vincent.legen
May be you can think differently : Instead of keeping all objects for 90 days,
keep only the accumulate results for each previous day.
- Mail original -
De: chrisLi shengtao0...@163.com
À: rules-users@lists.jboss.org
Envoyé: Jeudi 14 Juin 2012 18:06:50
Objet: [rules-users] Is a single
Done a little test using 3 approachs (with new BigDecimal(-12.321)), all are
working:
rule test big decimal 1
when
Pojo(bigDecimal 0.0)
then
System.out.println(test big decimal 1);
end
rule test big decimal 2
when
Pojo(bigDecimal.doubleValue 0.0)
then
In 5.4 timers support expressions for values.
You can thus use a fact used to hold timer values (init and delay). This fact
is created with some non-zero values, and reset all to zero once a first rule
has triggered
rule delayAtFirstTime timer(expr: $timerSpec.getDelay()+s , 0s)
when
Yes of course ...
Simpler this way ...
- Original Message -
From: Wolfgang Laun wolfgang.l...@gmail.com
To: Rules Users List rules-users@lists.jboss.org
Sent: Mercredi 6 Juin 2012 18:02:40
Subject: Re: [rules-users] Initial rule delay
Try:
timer( int: initial 0 )
-W
On 06/06/2012,
the same
effect as omitting the repeat-interval [Tested in 5.1 5.4].
Thanks Vincent, this seems to work. However I was hoping for a simpler solution
:)
- Paul
On Wed, Jun 6, 2012 at 5:06 PM, Vincent LEGENDRE
vincent.legen...@eurodecision.com wrote:
Yes of course ...
Simpler this way
The formula trick works : POI (api used inside drools) is reading values by
default for cells (at least the last time I used that in 5.1 version).
The main problem of this is when users adds new rows : you must ensure that
formula are copied too and this lead to other dirtier tricks (like
... which would mean I should be able to pass the value present in both the
columns in one method call.
Or create a Pojo for your keys (you should have already one as java maps only
have one key ...),
instanciate it in the first column in a local (to RHS) variable,
use setters to set
what is the initial value of b ?
what are the salience of your rules ?
and why not posting your rules directly ?
- Original Message -
From: learner anandbabu6...@yahoo.com
To: rules-users@lists.jboss.org
Sent: Mardi 29 Mai 2012 12:29:28
Subject: [rules-users] how to use only updated value
Your table seems correct, and writing a new one won't change the problem.
But errors are reported according to the generated DRL, so it is hard to say
which constraint is the problem.
To generate the DRL, you can use SpreadsheetCompiler (or may be something more
up-to-date?) like this :
Guvnor can provide rules to any instance, thus used as a shared repository...
Are you trying to duplicate Guvnor rules from one Guvnor instance to another ?
If yes :
- You can use repository export / import (Administration panel under
Guvnor)
- You can use the REST api of Guvnor to query
When using or, only one pattern of the or expression will be bound.
So, at runtime, onlty one variable $p1 or $p2 exists, and the other is null so
the NPE at runtime.
By the way, I can't see you are using a or here, as you test exactly the same
things ...
- Mail original -
De: Joana
I think (not sure) that an uploaded jar must be complete by itself.
The only things (classes) it can reference must be in guvnor's classpath
(guvnor own libs and tomcat and java, but not current package other jars).
So :
- try using a single jar
- or put all your jars in guvnor classpath
I already used a global limit of rule's firing with success to prevent these
kind of problems (with a big number, eventually calculated from rules as
Wolfgang said).
This works, at least to detect infinite loops, because usually, when this
happend, the number of firing increases very fast so
*Questions:*
1st -What cud be d problems in the above case?
.rf are not supported in guvnor. Use jbpm instead. See some previous (and
numerous) posts ...
2nd- can I create a test case for our rule flow in guvnor and execute it?
don't know if the session used for test scenario in guvnor use a
Seems that there is a confusion here ...
window:length(X) is constraining the events timestamps to be in a time-windows
of length X (in seconds).
To contrain the number of accumulated facts, it must be done by adding a
constraint in the resulting list :
$list : ArrayList(size Nb) from
heavilly discussed subjects ... This list should contain a lot of answers
already ...
To summarize :
- user date/time when rule last changed : Can be got from Guvnor, if you are
using it. If not, you have to plug something between your editor and your
storage
- date/time rule last
On 16/05/2012, Vincent LEGENDRE vincent.legen...@eurodecision.com wrote:
Seems that there is a confusion here ...
window:length(X) is constraining the events timestamps to be in a
time-windows of length X (in seconds).
Definitely not. It's window:time that restricts by a time interval.
oups
ok, got it.
not a strange construction, but a beautiful one !!
thx
- Mail original -
If you want to have a list, you can have it in addition to count:
accumulate( $w: Whatever(...) from window:length( 10 ),
$count: count(1), $list: collectList( $w ),... )
Another potentiel trick :
In State enum, add a method to build a State list from a list of string
enum State {
...
static ListState buildList(String listAsStr) {
// well, don't need to detail that ...
// ... but think to keep a cache somewhere to avoid unecessary
According to your post, I guess that your problem is not really for editing the
table, but at runtime the table does not behave like expected, yes ?
Could you post your table and the resulting DRL, and explain a bit more what
you have tried to do ?
- Mail original -
De: SuperGG
$r.installations only works if the attribute is public in RuleObject (and
numeric).
try $r.getInstallations() instead ...
Also, always have a look to the generated DRL (View Source under Guvnor)
- Mail original -
De: Manasi manasi.a.da...@capgemini.com
À: rules-users@lists.jboss.org
In ACTION, you can use :
- static methods
- non-static method on a previous matched objects
using addNode(...) like this is nonsense, even in plain java
If your addNode method applies to your matched Service object (which you binded
to variable s), use s.addNode(...)
Otherwise, you have
, but it will be a trick ...
- Mail original -
De: Vincent LEGENDRE vincent.legen...@eurodecision.com
À: Rules Users List rules-users@lists.jboss.org
Envoyé: Vendredi 11 Mai 2012 15:06:35
Objet: Re: [rules-users] Decision table call external method
In ACTION, you can use :
- static methods
I would say no.
I think that every session has its own RETE nodes filled with its own facts.
May be the different RETE instances share some evaluators (or at least
generated dynamic classes that represent nodes) so it could use a bit less
memory than recreating the same kbase again and again
I think that RETE is stored in kbase, and kPackage contains only some kind of
AST for rules.
So adding some rules (of same package or not) in a kbase (or a kbuilder) don't
use the origin ..
And mroe than that, I am pretty sure that rules are shared in RETE even if they
are from different
ok thanks.
seems dangerous anyway ..
and you said should be possible, which is (according to what I know in
english) not really sure ?
- Mail original -
De: Davide Sottara dso...@gmail.com
À: rules-users@lists.jboss.org
Envoyé: Mercredi 9 Mai 2012 23:50:54
Objet: Re: [rules-users] Is
Users changing rules IS the correct use-case of drools (I would even say that
if rules never change, drools is likely to be worse than pure java).
What others said is changing the rules at each request by regenerating and
recompiling is not.
I can't imagine that users may change rules at each
At this point I'm designing for the worst case i.e., I'm assuming the rules
with change with every request.
Keeping a cache will work for the worst case, but will work faster for normal
(see below) cases.
You can imagine the user changing these rules in a span of less than a
minute.
I did not assume that I've seen all use cases, nor that what I am a telling is
the absolute truth. See no offense in my previous post.
Yes, I was supposing some use case of my own experience, but please note it is
the first post when you describe what you are really trying to do, ie
And I did not see all pending posts ...
By reading them, there is another fact that lead to don't use drools.
You said that you query a distant DB. So, if you write rules to filter your
data, you will have first to get ALL data from your distant DB, add ALL data in
the drools WM, and only then
... OR load everything into a WM and then apply these dynamic rules.
Beware, I am not sure whether we can add/remove rules in an existing session (I
don't think so but I may be wrong).
Basically, a WM is built from a kBase, not the inverse ...
So you will have to recompile rules, that re-add
I am having an issue where I have a catch all
retraction rule setup as the lowest salience.
Not sure to understand that (note that I am not english native ...)
I see activations created for the facts but they are never fired. Any
thoughts on why this may happen?
Send some rules.
Are you sure that your rule compiles without errors ?
If the doc generation uses verifier, rules must first pass the raw compilation
...
- Mail original -
De: ssprick s.spr...@tiq-solutions.de
À: rules-users@lists.jboss.org
Envoyé: Mercredi 2 Mai 2012 15:04:01
Objet: Re: [rules-users]
Have a look to :
- templates :
http://docs.jboss.org/drools/release/5.3.0.Final/drools-expert-docs/html_single/index.html#d0e7413
- fluent API
- generate DRL, or XML, or use internal Guvnor classes to do so
In fact, while searching for links to put there (with google), I found this
'not so old'
JavaBeans convention : all default constructible and plenty of setters (for
writeable properties) and getters (for readeable properties)
- Mail original -
De: Michael Anstis michael.ans...@gmail.com
À: Rules Users List rules-users@lists.jboss.org
Envoyé: Jeudi 26 Avril 2012 15:40:27
On Apr 26, 2012, at 12:49 PM, Vincent LEGENDRE
vincent.legen...@eurodecision.com wrote:
JavaBeans convention : all default constructible and plenty of setters (for
writeable properties) and getters (for readeable properties)
- Mail original -
De: Michael Anstis michael.ans
The fact that you can bind from a constant is good to know.
But if I can give my feeling, I don't think that this more readable nor more
maintainable.
To me, if you really want to factorize, using accumulate is better ...
Mark's rule has a relatively big an complex 'then' part that justify an
and thanks for providing feedback !
- Mail original -
De: skatta1986 shivaprasad_...@yahoo.co.in
À: rules-users@lists.jboss.org
Envoyé: Mardi 24 Avril 2012 16:08:02
Objet: Re: [rules-users] please provide a rule for events timeout cases
thanks for the reply its giving expected results
No you can't ... or I really don't know how ..
You can duplicate a ruleflow group in a ruleflow (if your rule is only
dependant of others rules in the same group), but if a rule is a subpart of
multiple groups ... well ... I think you can't avoid to write your own agenda
filter, or try to use
lookup values.
Regards,
Armand
-Original Message-
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Vincent LEGENDRE
Sent: Monday, April 23, 2012 9:26 AM
To: Rules Users List
Subject: Re: [rules-users] Rules and Ruleflow GroupS
No you
In fact, you question is : What's the best way to define something that's
needed in the RHS but is not matchable in the LHS?
You said not important, but you want the income to be updated (I guess for
other rules' LHS) ... so it was not clear.
And what about using an accumulate rather than a
And make sure to use '==' when testing for equality!
Oh yes of course !!
Did not noticed ...
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without the error trace, hard to say why it crashes ...
But your rules can be simplified/clarified :
- and to connect conditions is not needed
- in your first 'not' condition, which you add to test that no other event
takes place between the two objects matched in previous patterns, you
You said that you will stick to the norms here but you do the opposite in your
post : Where are the rules ?
As far I can guess from all you wrote so far, the errors you have are all
easily fixable by reading the very basis of drools doc, like what is a field
constraint, how to specify it and
First approach is more like a quick-n-dirty trick.
It only works if you are sure that only one RuleContext exists in the working
memory.
If not ... the rule will lead to really strange results ...
The real question is why you have rules like that, what was the initial
justification? To me it
Le 13/04/2012 10:46, Wolfgang Laun a écrit :
5.3.0 and 5.4.0.Beta2: Comparing int and Integer fails unless the
traditional (up to 5.1.1) return value construct - parentheses
around the expression - is used:
lineItemId == ($lineItem.getID()) // OK
lineItemId == ($id) // OK with $id
I think (not sure) that the problem comes from the right part of your test :
$lineItem.ID
Try with $lineItem.getID(), or use 'dialect mvel' as rule property
You can also bind the id in LineItem and test it in the next pattern :
rule Test
when
$lineItem : LineItem( $lineID : ID 0
Integer.valueOf(1) (that will return a shared instance
of Integer).
But this is still very strange as doing the same test in java works (Integer is
treated as a int, and == is testing values ...)
- Mail original -
De: Vincent LEGENDRE vincent.legen...@eurodecision.com
À: Rules Users List rules
--
Vincent
LEGENDRE
Consultant
Snior
EURODECISION
9A
rue de la Porte de Buc 78000 VERSAILLES
Tl. : +33 (0)1 39 07 12 40
Direct : +33 (0)1 39 07 26 16
www.eurodecision.com
This is exactly what I did. This procedure works like a charm.
You said a lot of errors ? I can't be possible :) !!
Did you tag your corrections ? the NWELL ?
Message original
Sujet: Re: [rules-users] make the Guvnor interface into French
Date : Fri, 6 Apr 2012 21:27:47
Far much valuable reply than mine :)
A great summary of common concerns that must be evaluated before starting
coding a rule system.
Also consider :
- using rule flow (if you are allowed to)
- use sequential mode and pipe your data 'in the next rule box'
programmatically (using rules?)
with the recommendation you made.
Patrik Dufresne
On Thu, Mar 29, 2012 at 8:21 AM, Vincent LEGENDRE
vincent.legen...@eurodecision.com wrote:
Far much valuable reply than mine :)
A great summary of common concerns that must be evaluated before starting
coding a rule system.
Also consider :
- using rule flow
Quick summary of :
http://docs.jboss.org/drools/release/5.4.0.Beta2/drools-expert-docs/html_single/index.html#d0e5989
insert = inserts a new object in the working memory
update = tells the engine that an existing object in the working memory has
changed
Unexpected question from someone that
Thanks for the warning, some old bugs appears clearer now !!!
Is it planned in a near future to only exclude the constraint and not
the whole fact pattern ?
To me, it seems more accurate to do this way.
Le 19/03/2012 22:57, Michael Anstis a écrit :
This is true, but be aware that if a cell
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