The texts produced by the system are thus influenced by an interaction of the user's and the system's goals. In such a case, the user has control over the way the system executes its goals, but not, ultimately, over the goals themselves. In the ILEX-0 prototype, system goals are represented as a set of messages it plans to communicate. In the case of the Jewellery domain, these messages are seen as the educational goals of the display curator. Contemporary jewellers make innovative use of modern synthetic materials.
Jewellers frequently borrow techniques from other crafts such as pottery and weaving.
Each of these messages is ranked on a scale ranging from important to unimportant . Attached to individual pieces of jewellery or classes of jewellery are canned stories that can be told if those items are chosen by the user. Each story in the story-database is tagged by the message or messages it works towards. Stories are thus ranked in relevance on the basis of the messages they serve, and will be expressed or not on the basis of this relevance. Thus does content-selection serve the system's goals.