This isn't mentioned in Manning's Errata page for
Jess in Action.
1. p. 404: "listp" isn't defined in
Jess. Its proper name is "multifieldp".
(I had to peek into
PredFunctions.java to
discover that.)
This also explains why it
appears after "modify" and before "neq" in the
As I recall, salience in rulebased programming is akin to goto
statements in BASIC; a crutch for poor programing. In several books on
the subject (JIA ?) the comment usually is that while salience is
sometimes necessary more than three levels of salience should have a
really, really good
Thanks!
Jess 6.1p4 was prepared concurrently with the book, and I made some
changes to the software according to the needs of the book. This looks
like a case where I decided that multifieldp ought to be deprecated in
favor of a more sensibly named listp function, and I wrote that into
the
Eric Wang wrote:
This isn't mentioned in Manning's Errata page for Jess in Action.
In addition, the 2-rules example on pp. 22-23 is confusing. Since the
discussion is about the order of execution, implicit in the example is
the possibility of both rules firing in sequence. It is therefore a
I think Alexander Bogomolny wrote:
In addition, the 2-rules example on pp. 22-23 is confusing. Since the
discussion is about the order of execution, implicit in the example is
the possibility of both rules firing in sequence. It is therefore a
mistake to suggest that the second rule (stop)
I think that James Owen wrote:
As I recall, salience in rulebased programming is akin to goto statements
in BASIC; a crutch for poor programming
On that subject: Just as there are legitimate, structured uses for the GOTO
statement in some languages, salience can be used in a structured way that
It
seems like it's not a Protege or JessTab issue since " .."
means that ontology has already been loaded at this point. (batch
d:/Scenario/jess/clp/Create-Rules.clp) causes the trouble. Did you try to load
the rules one by one to figure out what rule causes this
problem?
Olga.
I think [EMAIL PROTECTED] wrote:
Hello, Ernest!
I downloaded and installed Jess version 6.1p7. I even slightly hacked error message
code, but still can't find an error. I am using Protege2.1 and JessTab1.1. First I
map an ontology to Jess. After that I have in Jess a list of facts like
I'm sorry - I just can not resist the temptation to jump in here.
It would seem to me, that no matter which technique is used to modularlize
the execution of rules (rule sets) whether it be control flags,
priorities, etc., the ultimate challenge of applying any control flow
architecture will be
I think that Rich Halsey wrote:
How I engineer the control (in either the determistic or non-deterministic
layer) is secondary to achieving a control flow architecture which
determines which rule sets are eligible to execute.
Rich,
No argument here: I think that it's understood that
Let me jump in just for fun here as well. The old ART (original
flavour of the mid 80's that Jason refers to) had something called
viewpoints that allowed one to explore multiple lines of reasoning
at once. It could, I imagine, have been suitable for today's
distributed computing environments or
It is always a pleasure to reply to Bob Orchard !!
To be a little more specific, a gentleman by the name of Dracos Manolescu
published some work entitled A Micro-Workflow along with a Java-based
system. As I read his papers (?) and looked at his Java examples, I came
away with a much clearer view
Footnote
The ART manual that I ...came across was graciously donated to my cause by
Bob Orchard.
Bob: I know I should have grabbed the Viewpoint manual, too! :-D
Given the pace of programming evolution, it's comforting to know that study
of something twenty years old (ART) can still give
Just a side note here: It is most refreshing to see the big guns
weigh in with their thoughts and references. While some of it may be
extraneous rabbit trails it is, nevertheless, enlightening. I realize
that the Jess email list is supposed to be dedicated to solving the
so-called real
If I have been able to see further, it was only
because I stood on the shoulders of giants.
Sir Isaac Newton
It's fun to wonder what a guy like Newton would have done with a tool like
Java or Jess.
Would Newton have been a programmer? I think he'd have been fascinated by
exploring his ideas
If I have just one Rete engine, nothing's threaded right?
myriam
To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]'
in the BODY of a message to [EMAIL PROTECTED], NOT to the list
(use your own address!)
I think [EMAIL PROTECTED] wrote:
If I have just one Rete engine, nothing's threaded right?
Regardless of the number of Rete objects you create, Jess won't create
any threads of its own.[*] You can, of course, create multiple threads
yourself, and manipulate Jess from them.
[*] EXCEPTION:
I'm having a problem executing queries with 'not's in them.
My goal is checking set membership with intersections, so I've
defined the following three queries:
Q1 - Items in set 1
Q2 - Items in both set 1 and set 2
Q3 - iitems in set 1 that are not in set 2
Unless I'm having a logic problem or
w SOOB]ENII OT 28 mAJ 2004 19:40 Medvedeva, Olga NAPISAL:
It seems like it's not a Protege or JessTab issue since oNTOLOGIQ
ZAGRUVENA .. means that ontology has already been loaded at this point.
(batch d:/Scenario/jess/clp/Create-Rules.clp) causes the trouble. Did you
try to load the rules
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