It is PTC ALD's development into an open set of diverse but associated tools that gives it its competitive edge over other features-based applications when producing documents to minute individual requirements. Its pure flexibility is demonstrated by the range of publications it can accommodate, from simple books or letters through journals to catalogs and other publications with combined text and graphical content and complex layouts. Where other products can only add content, build pages and create PDF output, PTC ALD uses its non-prescribed work method to create solutions for any conceivable publishing requirement. There are often many ways to solve a problem and PTC ALD's modular setup means that it can support any of the possible options.