Quark today announced the release of QuarkXClusive, a new XTensions module for QuarkXPress 6 that offers powerful variable data publishing capabilities. The free module, which is currently only available for Mac OS X, lets businesses output customized, database-driven documents on HP Indigo digital presses. “QuarkXClusive makes on-demand custom printing efficient because it allows personalized printing without putting excessive demands on the RIP,” said J├╝rgen Kurz, senior vice president of product development at Quark. “This gives Quark and HP customers the flexibility to print high-volume jobs with personalized content.”