<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:12pt">Abhay,<br> Q1: I think that this will depend on how many different products you have. If there is a small number it is more straight forward to have a rule for each one (so the 2nd option). This allows all you logic to be in one place. If there are a large number of products and writing a rule for each one is intractable you probably would want to look into some generalizations of the rules. Is that helpful?<br><br> Q2: I'm not quite sure what you are getting at in Q2. Are you trying to write validation rules or rules that are modifying the facts?<br><div><br></div><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt;">Wendy<br><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr
size="1"><b><span style="font-weight: bold;">From:</span></b> Abhay B. Chaware <Abhay.Chaware@kpitcummins.com><br><b><span style="font-weight: bold;">To:</span></b> "rules-users@lists.jboss.org" <rules-users@lists.jboss.org><br><b><span style="font-weight: bold;">Sent:</span></b> Fri, May 6, 2011 4:59:46 AM<br><b><span style="font-weight: bold;">Subject:</span></b> [rules-users] Basic rules question<br></font><br>
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<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Hi </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">I am a newbie to rule based applications and trying to get the
concept of rules. I have couple of questions about rules to start with, not
specifically about Drools though.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Q1 - Should rules be data/model specific or can/should they
be generic or both</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">==========================================================</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">e.g. </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">If selected product “TYPE” is
“laptop”, then category “RAM” should have all
“DDR” type items compatible ( selecting items matching certain property
)</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">OR</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">If selected product is “IBM T42”, then category
“RAM” should have “512MB DDR” , “1024MB
DDR”, “2048MB DDR” compatible. ( assigning individual items
in rules )</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">OR</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Combination of both</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Q2 – How should be the data modeled in above case</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">==========================================================</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">e.g. </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">in product master, each item ( e.g. T40, T42 ) should have a
“TYPE” ( e.g. desktop or laptop ) , all items in category “RAM”
should have a “TYPE” ( e.g. DDR ) and then control the assignment of
RAM options to the PRODUCT through Rule using “DDR” type ?</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">OR</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">in product master, each item ( e.g. T40, T42 ) should have a
“TYPE” ( e.g. desktop or laptop ) , all items in category “RAM”
should have a “compatibleProduct” column ( e.g. desktop or laptop
) and control the assignment of RAM to PRODUCT through “dynamic”
rules by selecting all the RAMs by passing the “TYPE” of the
product to the database handler.</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Am I making my point clear ?</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Thanks</span></font></p>
<p class="MsoNormal"><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;">Abhay</span></font></p>
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