The development of patient information systems faces the mayor problems of increasing and more complex content as well as the introduction of new techniques of system implementation. An integrated development demands for a method to deal with both aspects. The ISO/IEC 9126-1 offers a framework where both views can be integrated to a general view of the system and can be used as a basis for further development. This article wants to introduce the ISO/IEC 9126-1 as a supporting means for the development of patient information systems considering the example of a web service for a patient information system.