ISO 10303-214:2010(E)

Figure — Arrowleft Figure — Clause 4 Figure — Arrowright

4.2.309 Layer

A Layer is a general structure for the collection of geometric and annotation elements. Layers shall not be nested, i.e., a layer shall not be an element of another layer.

EXAMPLE The design of a mechanical part as a B_rep_model is performed in several steps:

The elements created in each stage are put on separate layers. After the creation of the B_rep_model, the wireframe elements can be looked at as 'auxiliary geometry'. This is then the purpose of its layer. The visibility control of the layer is usually used to display only the B_rep_model or to display the auxiliary wireframe elements in addition, e.g., for design changes.

The data associated with a Layer are the following:

4.2.309.1 description

The description specifies additional information about the Layer.

See layer to multi_language_string for the application assertion.

The description need not be specified for a particular Layer.

If present, there shall be exactly one object that defines the description for a Layer.

4.2.309.2 element

The element specifies a piece of product data that is collected by a Layer.

NOTE Although not explicitly modelled in the ARM, the element can be on various levels of granularity, e.g., a whole B-rep-model or a single Cartesian point.

See layer to detailed_element for the application assertion.

4.2.309.3 id

The id specifies the identifier of the Layer.



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