BS ISO 10303-21:1994

1. Scope
2. Normative references
3. Definitions
3.1 Terms defined in ISO 8859-1
3.2 Terms defined in ISO 10646
3.3 Terms defined in ISO 10303-1
3.4 Terms defined in ISO 10303-11
3.5 Terms defined in ISO 10303-44
3.6 Other definitions
4. Abbreviations
5. Exchange structure fundamental concepts and assumptions
5.1 Introduction
5.2 Notational and typographical conventions
5.3 Conformance
6. Formal definitions
6.1 Formal notation
6.2 Basic alphabet definition
6.3 Exchange structure
6.4 Definition of tokens
6.5 WSN of the exchange structure
6.6 Token separators
6.7 Parameter lists
7. Tokens
7.1 Special tokens
7.2 Keywords
7.3 Simple data types
7.3.1 Integer
7.3.2 Real
7.3.3 String
7.3.4 Entity instance names
7.3.5 Enumeration values
7.3.6 Binary
8. Structured data types
9. Header section
9.1 Header section entities
9.2 Header section schema
9.2.1 file_description
9.2.2 fine_name
9.2.3 file_schema
9.3 User-defined header section entities
10. Data section
10.1 Data section entities instances
10.2 Optional values
10.3 Scope structure
10.3.1 Syntax
10.3.2 References to entity instances within a SCOPE structure
10.3.3 Behaviour
10.4 Data section user-defined entity instances
11. Mapping from EXPRESS to the exchange structure
11.1 Mapping of EXPRESS data types
11.1.1 Mapping of EXPRESS simple data types
11.1.2 List
11.1.3 Array
11.1.4 Set
11.1.5 Bag
11.1.6 Simple defined types
11.1.7 Enumeration
11.1.8 Select data types
11.2 Mapping of EXPRESS entity data types
11.2.1 Entity with explicit attributes
11.2.2 Entity with explicit optional attributes
11.2.3 Entity with derived attributes
11.2.4 Entity with other entities as attributes
11.2.5 Entities defined as subtypes or supertypes of other
        entities
11.2.6 Entities with attributes redefined as an effect of
        a DERIVE
11.2.7 Attributes redefined as an effect of a subtype
        declaration
11.2.8 Mapping of the EXPRESS element of NUMBER
11.2.9 Entity WHERE rules
11.2.10 Entity with INVERSE attributes
11.3 Mapping of the EXPRESS element of SCHEMA
11.4 Mapping of the EXPRESS element of CONSTANT
11.5 Mapping of the EXPRESS element of RULE
11.6 Remarks
12. Printed representation of exchange structures
ANNEXES
A. File representation on storage media
A.1 Record-oriented transport content
A.1.1 Transport format for magnetic tape media
A.1.2. Other storage media with record-oriented storage
A.2 Line-oriented transport content
A.2.1 Transport format for diskette media
A.2.2 Other media
A.3 Treatment of multi-volume files
B. WSN notational conventions
C. Information object registration
C.1 Document identification
C.2 Schema identification
D. Basic alphabet and graphic character set
E. Guidelines for printing the exchange structure
E.1 Explicit print control directives
E.2 Implicit print control directives
F. Example of a complete exchange structure
F.1 Introduction
F.2 Example schema
F.3 Example short names
F.4 Example exchange structure
Index
FIGURES
1. Example 25
2. Example 27
Tables
1. WSN defining subsets of the basic alphabet
2. WSN of token definitions
3. WSN of the exchange structure
4. String control directives
5. Quick reference mapping table
6. Print control directives
B.1 Wirth Syntax Notation (WSN) defined in itself
D.1 Character set used in the exchange structure

Specifies an exchange structure format using a clear text encoding of product data for which the conceptual model is specified in the EXPRESS language.

This part ofISO 10303 specifies an exchange structure format using a clear text encoding of product data for which the conceptual model is specified in the EXPRESS language (ISO 10303-11). The file format is suitable for the transfer of product data among computer systems.

The mapping from the EXPRESS language to the syntax of the exchange structure is specified. Any EXPRESS schema can be mapped onto the exchange structure syntax.