ISO 10303-101:1994

INTERNATIONAL ISO
STANDARD 10303401
First edition
1994-12-15
Industrial automation Systems and
integration - Product data representation
and exchange -
Part 101:
Integrated application resources: Draughting
Sys temes d ‘automa tisa tion industrielle et in tegra tion - Reprksen ta tion
et khange de donnees de produits -
Partie 10 1: ßessources d ’application integrees: Dessins techniques
Reference number
ISO 10303-101 :1994(E)

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ISO 10303=101:1994(E)
Page
Contents
”
1
1 Scope.
1
2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Definitions .
.....................................
3.1 Terms defined inIS0 10303-1
....................................
3.2 Terms defined in ISO 10303-42
....................................
3.3 Terms defined in ISO 10303-46
3.4 Terms defined in ISO 10209-1 .
.............................................
3.5 Other definitions
.................................................
3.51 callout
........................................
3.52 draughting; drafting
............................................
3.5.3 drawing sheet
4
4 Drawing definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
4.2 Fundamental concepts and assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
4.3 drawing definition Schema type definition: draughting titled item . . . . . . . . . . . . . .
- - - -
5
4.4 drawing definition Schema entity definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- -
5
4.4.1 drawing definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-
6
4.4.2 drawing revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-
7
4.4.3 drawing revision sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- -
8
4.4.4 drawing sheet revision . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- -
8
sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.45 drawing sheet revision
- - -
9
4.4.6 drawing sheet revision usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
4.4.7 draughtiig title . . . . y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
4.5 drawing definition Schema rule definition: drawing sheets not nested . . . . . . . . . . . .
- - -
12
5 Draughting element . . y. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
5.2 Fundamental concepts and assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or
utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
ii

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ISO 103039101:1994(E)
%O
14
5.3 draughting element Schema type definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
5.3.1 draughting callkt element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
5.3.2 dimension extent isage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
element Schema entity definitions . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 draughting
-
15
5.4.1 dimension cu; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-
17
5.4.2 leader curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-
18
5.4.3 projection cuTve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
5.4.4 terminator-Symbol
19
54.5 dirnension-cu~eterminator ’:::::::::::::::::::::::::::::::::::
20
5.4.6 leader terminator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
5.4.7 draughting callout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
5.4.8 draughting-callout relationship . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
5.4.9 leader directed caiout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23
5.4.10 projection dirkted callout
24
5.4.11 dimension-curvedirectedcallo;t ’:::::::::::::::::::::::::::::::
-
- -
25
6 Draughting dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
6.2 Fundamental concepts and assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
6.3 draughting dimension Schema entity definitions . . . . . . . . . . . . . . . . . . . . . . . . . .
-
-
27
6.3.1 dimension callout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29
6.3.2 dimension-graph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
6.3.3 dimensiongraphqrojection curve usage . . . . . . . . . . . . . . . . . . . . . . . . . . .
31
6.3.4 dimension-graph sequence y . . . T. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- -
Annexes
. . . . . 32
A. Short names of entities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . 34
...................................
B. Information Object registration
. . . . . 34
....................................
B.l Document identification
34
. . . . .
.....................................
B.2 Schema identification
. . . . . 34
.............
B.2.1 drawing definition Schema identification . . . . . . . . .
- -
. . . . . 34
.............
B.2.2 draughting element Schema identification . . . . . . . . .
-
-
. . . . . 34
.............
B.2.3 draughting dimension Schema identification . . . . . . .
- -
36
. . . . . . . . . . . . . . . . .
C. EXPRESS listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . 37
,.* . . . . . . . . .
D. EXPRESS-G figures . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . 40
. . . . . . . . . . . .
Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
41
. . . . .
. . . . . . . . . . . .
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . .
111

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OISO
ISO 10303=101:1994(E)
Figures
Figure 1 - Leader line shared by dimension and tolerante . 14
Figure 2 - Dimension curves 16
...........................................
17
Figure 3 - Leader curves .
18
Figure 4 - Projection curves .
Figure 5 - Leader directed callout 22
........................................
Figure 6 - Projection directed callout 24
......................................
25
Figure 7 - Dimension curve directed callout .
Figure 8 - Dimension graphs . 27
....................... 37
Figure D. 1 - Drawing definition Schema EXPRESS-G figure
38
Figure D.2 - Draughting element Schema EXPRESS-G figure .
Figure D.3 - Draughting dimension Schema EXPRESS-G figure . 39
Tables
32
A.l-Shortnamesofentities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv

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ISO 10303=101:1994(E)
@ISO
Foreword
The International Organization for Standardization (ISO) is a worldwide federation of national Standards
The work of preparing International Standards is normally carried out
bodies (ISO member bodies).
through ISO technical committees. Esch member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
Draft International Standards adopted by technical committees are circulated to the member bodies for
voting. Publication as an International Standard requires approval by at least 75% of the member bodies
casting a vote.
International Standard ISO 10303-101 was prepared by Technical Committee ISO/TC 184, Mustrial
automation systems and integration, Subcommittee SC4, Industrial data and global manufacturing
languages.
ISO 10303 consists of the following Parts under the general title Mustrial automation Systems and
integration - Product data representation and exchange:
- Part 1, Overview and fundamental principles;
- Part 11, Description methods: The EXPRESS language reference manual;
- Part 21, Implementation methods: Clear text encoding of the exchange structure;
Standard data access interface;
- Part 22, Implementation methods:
- Part 31, Conformance testing methodo ogy and framework: General concepts;
ogy and framework: Requirements on testing
- Part 32, Conformance testing methodo
laboratories and clients;
- Part 41, Integrated generic resources: Fundamentals of product description and support;
Geometrie and topological representation;
- Part 42, Integrated generic resources:
- Part 43, Integrated generic resources: Representation structures;
- Part 44, Integrated generic resources: Product structure configuration;
- Part 45, Integrated generic resources: Materials;
V

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ISO 10303=101:1994(E) OISO
- Part 46, Integrated generic resources: Visual presentation;
- Part 47, Integrated generic resources: Shape Variation tolerantes;
- Part 49, Integrated generic resources: Process structure and properties;
- Part 101, Integrated application resources: Draughting;
- Part 104, Integrated application resources: Finite element analysis;
- Part 105, Integrated application resources: Kinematics;
- Part 201, Application protocol : Explicit draughting;
- Part 202, Application protocol: Associative draughting;
- Part 203, Application protocol: Configuration controlled design;
Sheet metal die planning and design;
- Part 207, Application protocol:
Printed circuit assembly product design data;
- Part 2 10, Application protocol:
Numerital control process Plans for machined Parts.
- Part 213, Application protocol:
The structure of this International Standard is described in ISO 10303-1. The numbering sf the Parts of
this International Standard reflects its structure:
- Part 11 specifies the description method;
- Parts 2 and 22 specify the implementation methods;
- Parts 3 and 32 specify the conformance testing methodology and framework;
- Parts 4 to 49 specify the integrated generic resources;
- Parts 101 to 105 specify the integrated application resources;
- Parts 201 to 2 13 specify the application protocols.
Should further Parts be published, they will follow the Same numbering Pattern.
Annexes A and B form an integral part of this part of ISO 10303. Annexes C, D, and E are for
information only.

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OISO ISO 10303~101:1994(E)
Diskette
Users should note that this part of ISO 10303 comprises a diskette:
- the short names of entities given in annex A are also included on the diskette;
- the EXPRESS listings (annex C) are provided on the diskette only;
- a method to enable users to report errors in the documentation is given. Full detai s arc
provided in the file.
1
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ISO 10303=101:1994(E)
OISO
Introduction
ISO 10303 is an International Standard for the computer-interpretable representation and exchange of
product data. The objective is to provide a neutral mechanism capable of describing product data
throughout the life cycle of a product independent from any particular System.
The nature of this
description makes it suitable not only for neutral file exchange, but also as a basis for implementing and
sharing product databases and archiving.
This International Standard is organized as a series of Parts, each published separately. The Parts of ISO
10303 fall into one of the following series: description methods, integrated resources, application
protocols, abstract test suites, implementation methods, and conformance testing.
The series are
described in ISO 10303-1. This part of ISO 10303 is a member of the integrated resources series. Major
subdivisions of this part of the International Standard are:
- drawing definition which specifies the resources necessary for the identification, description,
organization, and administration of drawing and drawing sheet Versions;
- draughting element which specifies the resources representing basic draughting elements such as
dimension lines, projection lines, leader Iines and the use of these resources in combination with other
annotation curves, Symbols, and text to depict information found on the drawing sheet;
- draughting dimension which specifies the resources necessary for the use of basic draughting
elements, in combination with other annotation curves, Symbols, and text, to depict dimensions,
tolerantes, and dimension-related information on a drawing sheet.
The objective of this part is the system-independent representation of digital CAD data resulting from the
application of draughting practices in the drawing depiction of product definition data. This part provides
for the representation of draughting information not provided for in other integrated resource Parts of ISO
10303. Where necessary, it provides the draughting semantic extension to information represented in
those Parts.
Requirements and practices regarding the draughting-specific use, appearance, and specific aggregation
of curves, Symbols, and text are specified in draughting-practices Standards regarding technical drawings,
such as those compiled in ISO Standards Handbook 12.
. . .
Vlll

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INTERNATIONAL STANDARD @ISO ISO 10303-101: 1994(E)
Industrial automation Systems and integration -
Product data representation and exchange -
Part 101:
Integrated application resources: Draughting
1 Scope
This part of ISO 10303 specifies the resource constructs for the representation of draughting information.
The following are within the scope of this part of ISO 10303:
- information regarding the definition, description, and administration of a drawing and the sheets
of a drawing;
- elementary draughting annotations and their aggregation with more general annotations for the
depiction of facts and requirements concerning the product or interpretation of a drawing;
- draughting annotations used in the depiction of dimensions, tolerantes, and related dimension-
measurement information.
The following are outside the scope of this part of ISO 10303:
- management information such as changes that create drawing Versions, approvals, contracts under
which draughting work is done, security classification, persons responsible, and the roles of
responsibility of these persons, provided in ISO 10303-41;
- views and the viewing mechanism for depiction of the shape, provided in ISO 1030346;
- styled generic annotations (i.e., curves, Symbols, text and sectioning (crosshatching)), provided in
ISO 10303-46;
- coordinate Systems for the location of annotations, and their relationships, provided in ISO 10303-
42 and ISO 10303-43.
2 Normative references
The following Standards contain provisions which, through reference in this text, constitute provisions
of this part of ISO 10303. At the time of publication, the editions indicated were valid. All Standards
are subject to revision, and Parties to agreements based on this part of ISO 10303 are encouraged to
1

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OISO
ISO 10303=101:1994(E)
Members
investigate the possibility of applying the most recent editions of the Standards indicated below.
of IEC and ISO maintain registers of currently valid International Standards.
Vocabulary - Part 1: Terms relating to technical
ISO 10209- 1: 1992, Technical product documentation -
drawings: general and types of drawing.
Product data representation and
ISO 10303- 1: 1994, Industrial automation systems and integration -
exchange - Part 1: Overview andjundamental principles.
Product data representation and
ISO 10303-11: 1994, Mustrial automation Systems and integration -
exchange - Part 11: Description methods: The EXPRESS language reference manual.
Product data representation and
ISO 10303-4 1: 1994, Mustrial automation systems and integration -
exchange - Part 41: Integrated generic resources: Fundamentals of product description and support.
Product data representation and
ISO 10303-46: 1994, Mustrial automation systems and integration -
exchange - Part 46: Integrated generic resources: Visual presentation.
J , Information Technology - Open Systems Interconnection - Abstract Syntax Notation
ISO/IEC 8824-1:
One (ASN. 1) - Part 1: Spectjkation of Basic Notation.
3 Definitions
3,l Terms defined in ISO 103034
This part makes use of the following terms defined in ISO 10303-1.
icatio
- aPPl n;
- application protocol;
resource;
- appl ication
- data;
- formal;
- generic resource;
- information;
‘) To be published.
2

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@ISO
ISO 10303=101:1994(E)
- integrated resource;
- product;
- product data;
- resource construct.
3.2 Terms defined in ISO 10303-42
This part makes use of the following term defined in ISO 1030342.
- curve.
3.3 Terms defined in ISO 10303-46
This part makes use of the following terms defined in ISO 10303-46.
- annotation;
- presentation.
3.4 Terms defined in ISO 10209-1
This part makes use of the following term defined in ISO 10209-1:
- drawing;
- technical drawing.
3.5 Other definitions
For the purposes of this part of ISO 10303, the following definitions apply:
3.5.1 callout: A depiction of requirements and information about a product.
3.5.2 draughting; drafting: An activity of selecting and configuring appropriate representations of
human-interpretable presentation in the
product data for the form of a drawing.
3.5.3 drawing sheet: A subdivision of a drawing having the Same identifier as the drawing and its own
sheet number . A drawing sheet may contain part or all of the text or pictorial presentations of the
drawing.
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ISO 10303~101:1994(E) OISO
4 Drawing definition
The following EXPRESS declaration begins the drawing definition Schema and identifies the necessary
- -
external references.
EXPRESS specification:
*
1
SCHEMA drawing definition Schema;
-
REFERENCE FROM support resource Schema
- -
(label,
text,
identifier,
bag to Set);
- -
REFERENCE FROM representation Schema
-
(mapped item,
-
representation-relationship,
representation);
REFERENCE FROM presentation Organkation Schema
-
(area in set,
- -
presentation area,
presentation set,
-
presentation representation relationship);
- -
*
(
NOTE - The Schemas referenced above tan be found in the following Parts of ISO 10303:
ISO 10303-41
support-resource Schema
-
ISO 10303-43
representation Schema
-
ISO 10303-46
presentation Organkation Schema
- -
4.1 Introduction
drawing definition Schema is the identification, description, organization, and
The subject of the
-
It-identifies drawing revisions and drawing sheet revisions that
administration of drawing revisions.
It describes the relationship between revisions of drawings and sheets. In short,
comprise a drawing.
this Schema provides resources for the definition and management of the drawing.
NOTE - An EXPRESS-G diagram for this Schema appears in annex D.
4

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OISO
ISO 103030101:1994(E)
4.2 Fundamental concepts and assumptions
A drawing is a draughting-specific presentation of information about a product including information used
to interpret the presentation. A drawing tan be partitioned or divided into a number of drawing sheets.
Drawings are configured and administered by Versions. Esch drawing, including its drawing sheets, may
have many Versions. Versions of drawings and drawing sheets are known as revisions. A drawing is
a revision whether it be initial or the result of Change. If any drawing sheet is added, changed, or
deleted, a new revision of the drawing may be established. The ability to identify and describe a drawing
revision is provided, independently of organizational practices.
A revised drawing or drawing sheet is considered a successor of the original drawing or drawing sheet.
The revisions of a drawing or drawing sheet may be sequentially ordered.
Drawing and drawing sheet revisions may have a draughting-specific title or description.
A draughting
title may Change for subsequent revisions of the drawing or drawing sheet.
4.3
drawing definition Schema type definition: draughting titled item
- - - -
A selection of items which may be given a draughting-specific title.
EXPRESS specification:
*
1
TYPE draughting titled item = SELECT
-
(drawing revision,
drawing sheet revision);
- -
END TYPE;
-
*
(
4.4 drawing definition Schema entity definitions
- -
4.4.1 drawing definition
-
A drawing definition identifies and categorizes, by type, a set of drawing Versions.
NOTE - When the need for a drawing is identified, a drawing definition begins its existente when the
Organkation assigns a drawing number.
EXPRESS specification:
*
)
ENTITY drawing definition;
-
drawing number : identifier;
drawing type : OPTIONAL label;
END ENTITY;
*
(

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ISO 10303~101:1994(E) OISO
Attribute definitions:
drawing number: An identifier for the Versions of a drawing.
-
NOTE l- Drawing numbers themselves are often composed of Parts such as: a type prefix, a part
number Stern), and a suffix. Its composition is provided by the originating organization.
Nr
EXAMPLE 1 - “CK123456-789 ”, “DL-S12345 ”, ” lB5 102-04 ”) and ” lD555OO” are examples of drawing
number strings.
drawing type: A label used to describe the functional categorization of the drawing.
-
NOTE 2 - A type of drawing is used to communicate a specific Portion of the information about a
product. For a printed wiring assembly, the functional aspects are communicated by means of a schematic
diagram whereas the physical aspects are communicated by means of another drawing type.
EXAMPLE 2 - “SCHEMATIC DIAGRAM ”, “SITE PLAN ”, “DETAIL ”, and “ASSEMBLY (( are examples
of drawing-type labels. Additional examples for drawing-type labels may be found in clause 3 of ISO 10209-
1.
4.4.2 drawing revision
-
A drawing revision is a Version of a drawing, resulting from creation or Change.
EXPRESS sDecification:
*
1
ENTITY drawing revision
SUBTYPE OF (presentation-Set);
revision identifier : identifier;
-
drawing identifier : drawing definition;
-
-
intended scale : OPTIONAL text;
-
UNIQUE
URl: revision identifier, drawing identifier;
- -
END ENTITY;
*
(
Attribute definitions:
revision identifier: An identifier for the revision of the drawing.
-
Any limit or
NOTE - The values for this representation may be compriserl of any allowable characters.
restrictions must be specified in an Application Protocol. Typically the revision identifier is an alphanumeric
string.
6

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QIso ISO 10303=101:1994(E)
EXAMPLE 3 - The revision identifier may be “An, “AA ”, “2.4 ”, or could be “3 1 ”.
drawing identifier: An identifier for the drawing.
-
intended scale: A text description of the intended drawing scale where the description is for information
-
only.
EXAMPLE 4 - “1/4 ”, “lOO:l ”, “NONE” are drawing scale examples.
Formal propositions:
URl: The identifier for a Version of a drawing shall he unique for that drawing.
EXAMPLE 5 - A drawing revision identified by the letter “A” is the only drawing revision identifkd by
that letter in the set of revisions of a particular drawing.
4.4.3 drawing revision sequence
- -
A drawing revision sequence is the successive relationship of one Version to another for the Same
drawing.
EXAMPLE 6 - If two drawing revisions were identified by revision identifiers equal to A and B successively,
identified by A would play the role of predecessor and the drawing revision identifkd
the drawing revision
by B would play the role of successor in the sequence of drawing revisions.
EXPRESS specification:
*
)
ENTITY drawing revision sequence;
- -
predecessor : drawing revision;
-
successor : drawing revision;
-
WHERE
WRl: predecessor :<>: successor;
END ENTITY;
-
*
(
Attribute definitions:
predecessor: A Version of a drawing which precedes another version of a drawing.
A Version of a drawing which succeeds another Version of a drawing.
successor:
NOTE - A drawing version (i.e., drawing revision) may precede or succeed another version of the same
-
not identifkd by the same drawingdefinition) in a logical
drawing or a version of a different drawing (i.e.,
sequence of drawings .
7

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ISO 10303~101:1994(E)
Formal propositions:
WRl: A particular revision of a drawing shall not precede nor succeed itself.
4.4.4 drawing sheet revision
-
-
A drawing sheet revision is a Version of a drawing sheet. It may either be an initial Version or a
modification of a previous Version.
NOTE 1 - As a type of area in set, the drawing sheet revision provides the information necessary to
- - - -
present a version of a drawing sheet. It also specifies the administrative data used to manage a version of
a drawing sheet, with respect to the drawing revision.
EXPRESS specification:
*
1
ENTITY drawing sheet revision
- -
SUBTYPE OF (presentation area);
-
revision identifier : identifier;
-
WHERE
WRl: SIZEOF( QUERY(item <
* SELF\representation.items 1
('REPRESENTATION SCHEMA.MAPPED ITEM' IN (TYPEOF(item)))
-
AND
('DRAWING DEFINITION SCHEMA.DRAWING SHEET REVISION' IN
(TYPEOF(item\mapped Ttem.mapping source.mapped representation)))))=O;
- - -
END ENTITY;
*
(
Attribute definitions:
revision identifier: Identifier for the revision of a drawing sheet.
-
Formal propositions:
sheet revision shall not have another drawing sheet revision mapped into it.
WRl: A drawing
- - - -
NOTE 2 - For requirements regarding the mapped item see of ISO 10303-43.
-
4.4.5 drawing sheet revision sequence
- - -
A drawing sheet revision sequence is an association between two drawing sheet revisions that specifies
one as the successor of the other.

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ISO 10303-101:1994(E)
OISO
EXAMPLE 7 - An instance of drawing sheet revision sequence where rep 1 is an instance of
- - - -
with a revision-identifier of “A” and rep-2 is an instance of
drawing sheet revision
-
drawing sheet revision with a revision identifier of “B” represents the successive relationship between the
- - -
predecessor (revision ” A ”) and successor (revision “B “).
EXPRESS sPecification:
*
1
ENTITY drawing sheet revision sequence
-
-
SUBTYPE OF (representation relationship);
WHERE
WRl: SELF\representation-relationship.rep-1 :<>:
SELF\representation-relationshipxep-2;
wR2: 'DRAWING DEFINITION SCHEMA.DRAWING SHEET REVISION
- -
-
IN TYPEOF (SELF\representation_relationship.rep-1
WR3: 'DRAWING DEFINITION SCHEMA.DRAWING SHEET REVISION
- -
IN TYPEOF (SELF\representation_relationship.rep-2
END ENTITY;
-
*
(
Attribute definitions:
1: The drawing sheet revision that is the predecessor in the
SELArepresentation relationship.rep
- - - -
drawing sheet revision sequence.
- - -
SELF\representation relationship.rep 2: Tbc drawing sheet revision that is the successor in the
- - - -
sequence.
drawing sheet revision
- - -
Formal proDositions:
sheet revisions that are related shall be different instances.
WRl: Tbc drawing
- -
sheet revision.
WR2: rep 1 shall be a drawing
- - -
2 shall be a drawing sheet revision.
WR3: rep
- -
-
4.4.6 drawing sheet revision usage
- - -
revision
sheet revision usage entity relates a drawing sheet revision with a drawing
The drawing -
- -
- - -
sheet revision may be used in more than
and assigns a sheet number for this usage, where a drawing
- -
one drawing revision.
9

---------------------- Page: 17 ----------------------
ISO 10303-101:1994(E)
EXPRESS specification:
*
1
ENTITY drawin ,g sheet revis i on u sage
-
SUBTYPE OF (area-in-Set)
;
sheet number : identifier;
-
UNIQUE
URI: sheet number, in set;
-
WHERE
WRl: 'DRAWING DEFINITION SCHEMA.DRAWING SHEET REVISION' IN TYPEOF
(SELF\area in set.kea)AND'DRAWING DEF
...