It was noted that there is an urgent need to develop a full vocabulary for UI Design - a lexicon or glossary. Clearly, it is some, summary, abbreviation or small image but without precise definition it is open to misuse or misunderstanding. It was observed that Presentation is essentially an element of the Form of UI Design problem. Function goes more to behavior and functionality, whilst Form is Presentation, Style, Layout and appearance. If we consider an object model which is intended to represent the mental model for the user i.e. the designers' model where the designer is hopefully as close to a user's mental model as possible, then we can look at Form and Function is a slightly different light.
Form lends itself to attributes of any given object.
The composition of those attributes, the aggregation of content, and inheritance of attributes or content. For example, this website contains a number of objects which in the abstract are White Papers, Editorials, Book Reviews and so forth. They have a physical implementation as HTML pages. Each of them reuses a template, layout, grid devised from a program of such grids for the website. Function on the other hand, lends itself to the behavior of an element in a design.