title: Defining Collections in drl file
body: <p>I'm going to do some ruling stuff with drools.
  This is the first time I use this tool and, for functional requirements, i've thought a need to define a weights data-structure in a drl document.</p>
  
  <p>I have to use the "java-like" syntax (i don't even know if there are others types of syntaxes at this moment).</p>
  
  <p>Is there any way to write down programmatically any kind of java collection in a drl file?</p>