1. A computer system for processing messages for online presentation, the system comprising: a computer-readable means having a description file stored thereon, the description file including multiple statements written in a customizable, tag-based interpreted language for processing data contained in the messages; and a data shaper for translating and executing the statements in the description file to produce publishing matter suitable for online presentation, the translation and execution of the statements defining the operational behavior of the data shaper, the operational behavior of the data shaper shaping the data contained in the messages to produce the publishing matter suitable for online presentation.