[rules-users] Comparing names

Hello all, I am new to Drools… I have a scenario Each fact object will have the structure: Title Proprietor Group Proprietor Name E.g. 2100-100 J2 ½ share SMITH, JOHN JONES, FRED T ½ share BROWN, CHARLIE 2100-101 J2 ½ share BROWN, CHARLIE JONES, FRED T ½ share SMITH, JOHN 2100-102 T ½ share BROWN, CHARLIE J2 ½ share JONES, FRED SMITH, JOHN The group names and the proprietor names must be the same across each Title. The scenario above is a valid case. A failed case would result for Title 2100-100 if we add an extra Proprietor name e.g. WHITE, MARY. I anticipate having one rule to cater for this. I am hedging towards the ‘collect’ operator but cannot get a clear picture on how to implement it. -- Regards, Ian Spence