BS ISO 10303-47:1997

1 Scope
2 Normative references
3 Definitions
    3.1 Terms defined in ISO 129
    3.2 Terms defined in ISO 286-1
    3.3 Terms defined in ISO 1101
    3.4 Terms defined in ISO 2692
    3.5 Terms defined in ISO 5459
    3.6 Terms defined in ISO 10578
    3.7 Terms defined in ISO 10303-1
    3.8 Other definitions
4 Shape aspect definition
    4.1 Introduction
    4.2 Fundamental concepts and assumptions
    4.3 shape_aspect_definition_schema type definition:
          limit_condition
    4.4 shape_aspect_definition_schema entity definitions:
          datum
    4.5 shape_aspect_definition_schema entity definitions:
          derived shapes
5 Shape dimension
    5.1 Introduction
    5.2 Fundamental concepts and assumptions
    5.3 shape_dimension_schema type definitions
    5.4 shape_dimension_schema entity definitions
6 Shape tolerance
    6.1 Introduction
    6.2 Fundamental concepts and assumptions
    6.3 shape_tolerance_schema type definitions
    6.4 shape_tolerance_schema type definitions:
          geometric tolerance
    6.5 shape_tolerance-schema entity definitions: range
Annexes
A Short names of entities
B Information object registration
C EXPRESS listing
D EXPRESS-G figures
E Bibliography
Index
Figures
1 Examples of datum and datum_feature
2 Composite_shape_aspect
3 Symmetry_shape_aspect and centre_of_symmetry
4 Geometric_alignment
5 Geometric-intersection
6 Parallel_offset
7 Symmetric_shape_aspect and composite_shape_aspect
8 Single angular shape_aspect
9 Angular_location
10 Angular_size
11 Dimensional_location with dimensional_size
12 Dimension_location_with_path
13 Runout_zone_definition
D.1 Shape_aspect_definition schema (see also figure D.2)
D.2 Shape_aspect_definition schema (see also figure D.1)
D.3 Shape_dimension schema
D.4 Shape_tolerance schema (see also figure D.5 and D.6)
D.5 Shape_tolerance schema (see also figure D.4 and D.6)
D.6 Shape_tolerance schema (see also figure D.4)
D.7 Shape_tolerance schema (see also figure D.5)
Tables
A.1 Short names of entities

Defines the resource constructs for representation of dimensions and tolerances of product shapes. The dimensions define the sizes of a shape and locations of identifiable portions of a shape.

This part of ISO10303 specifies the resource constructs for representing dimensions and tolerances of product shapes. The dimensions specify the sizes of a shape and locations of identifiable portions of a shape. The tolerances specify the allowable deviation of a product from its defined shape and dimensions. The representations of dimensions and tolerances provided by this part of ISO10303 are appropriate for use with both 2D and 3D geometric models of parts.

The following are within the scope of this part of ISO10303:

• tolerances as constraints on the shape characteristics of a product;

• the specification of the tolerances on a defined shape;

• the representation of geometrical tolerances and plus-minus tolerances;

• the representation of tolerance values;

• the representation of dimensions;

• the assignment of size characteristics to a shape;

• the assignment of location and orientation characteristics to a shape;

• the specification of datums and datum references;

• the identification of derived shape elements such as centre lines and intersections;

• the structure for limit and fit systems for shapes.

The following are outside the scope of this part of ISO10303:

• the definition of the fundamental principles, concepts and terminology of tolerancing and dimensioning;

• the mathematical definition of tolerances and datums;

• the description of dimensioning or tolerancing practices;

• the specification of dimensional inspection methods;

• the synthesis and analysis of tolerances;

• the tolerancing of product characteristics other than shape;

• the presentation of tolerances on engineering drawings;

• the specification of surface finish or surface roughness.