Standard for the specific standard:

Standard for the specific standard technical areas. These norms are based on previously described models. Typical categories of these norms are:

a. Drafting, which describes the data type and structures for the layout the drawing and the presentation of technical objects? Various views, cross-sections, as well as dimensioning are captured,

b. Product structure configuration management defines data structure, makes possible the administration and the comparison of specified various product versions. From this data structure of the partial model, the bill of material and the product structure can be derived,

c. finite element analysis which is represented by the partial model analysis application, and

d. Kinematics where information for gears and robots is kept.

For ship building and building construction, the partial model architecture, engineering, engineering construction are described.

Application protocols, which are used to give the user a certain amount of freedom, are still left open in the above standards. The application protocols are the final references to abide by:

• Version 1 of STEP; Exchange of CAD drawings.
• Version 2 of STEP; Exchange of drawing from 3-D product model.
• Version 3 of STEP; Exchange configuration controlled 3-D product definition.
• Version 4 of STEP; Exchange of b-Rep models.

In principle, the STEP development is done in three phases. In the first phase, an application-oriented information structure is provided. This structure is also called the application model; and is referred to as the application layer.