1. A computer program product tangibly embodied in an information carrier for defining a custom computer-executed business process for a particular business enterprise, the computer program product comprising: a generic component that includes instructions that, when executed, cause transaction data to be processed in a manner that is applicable to many different business enterprises; a rule handling component that includes data structures and instructions that, when executed, enable a person to define information that controls the manner of processing transaction data that is applicable to a particular business enterprise, wherein: the data structures comprising: a rule collection data structure to store rule collection data; a rule data structure to store rule data wherein: a rule entry in the rule data structure includes an execution portion that identifies processing of transaction data to be performed when a rule condition associated with the rule entry is met; and at least one entry in the rule data structure relates to at least one entry in the rule collection data structure; and a rule condition data structure to store rule condition data wherein: a rule condition entry in the rule condition data structure includes a condition portion that defines conditions for which the execution portion of a related rule entry is to be executed; and at least one entry in the rule condition data structure relates to at least one entry in the rule data structure; and the instructions that, when executed, cause the rule handling component to perform steps comprising: enabling the person to indicate one or more search attributes; searching in the entries of one or more of i) the rule collection data structure, ii) the rule data structure, and iii) the rule condition data structure to identify one or more entries that match the one or more search attributes; and displaying the identified one or more entries that match the one or more search attributes.