The parametric behaviour of an object describes whether its shape, position, and orientation are designed to be dependent on other information associated with the object or the context in which it is placed, allowing for full or partial reconfiguration.
An object’s parametric behaviour can be transferred as part of the information delivery or not.
The parametric behaviour can be requested fully, partially, or not at all in the context of information exchange.
To some extent, the following geometry types can allow the transfer of parametric behaviours:
- Explicit geometry defines shape as boundary representations (vertices, edges, and faces) that cannot be modified by other parameters;
- constructive geometry defines shape as constructive solid geometry based on geometric primitives and swept solids that can be modified by shape parameters.
- The definition of a single shape or an assembly of shapes through equations that provide values for shape parameters, allowing for shape modifications based on object or context characteristics, is known as parametric geometry.
 BS EN 17412‑1:2020 clause 6.2.6