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### Parts

SISCAD-P supports assembly modelling. A part is a unit consisting of

- item number,
- system of co-ordinates,
- scale.

The object to create has to be constructed within the activated part. You cannot construct a line, for example, the endpoints of which belong to two different parts.
Comprehensive parameterizing however, is allowed with some restrictions.
It is allowed

- to connect the position point (zero point) of a part with a point in another part ( -> INCLUDE PART, MODIFY PART; parameter RELAP).
- to associate the angle (position angle) with geometries in other parts through a formula.
- to associate parametric dimensions with dimensions and variables in other parts through a formula (MODIFY NOMINALSIZE).
- to associate variables with variables in other parts through a formula (CREATE VARIABLE, MODIFY VARIABLE).

Parts are closely related to bill of materials. Please read the explanations under the respective commands.