Form specification files Form specification files are the source files defining the layout and content of application forms. Understanding form filesA form specification file is a source file that defines an application form providing for end user interaction with a program.Form file conceptsForm specification file contains different types of elements.Form item typesThe form item types defines the purpose of form elements.Form file structureA form specification file is defined by a set of sections.Form item attributesThe form item attributes reference.ExamplesForm definition (.per) examples.