Application module: Property identification ISO/TS 10303-1085:2005(E)
© ISO

Cover page
Table of contents
Copyright
Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and abbreviations

4 Information requirements
   4.1 Required AM ARMs
   4.2 ARM entity definitions
5 Module interpreted model
   5.1 Mapping specification
   5.2 MIM EXPRESS short listing

A MIM short names
B Information object registration
C ARM EXPRESS-G   EXPRESS-G
D MIM EXPRESS-G   EXPRESS-G
E Computer interpretable listings
Bibliography
Index

Introduction

ISO 10303 is an International Standard for the computer-interpretable representation of product information and for the exchange of product data. The objective is to provide a neutral mechanism capable of describing products throughout their life cycle. This mechanism is suitable not only for neutral file exchange, but also as a basis for implementing and sharing product databases, and as a basis for archiving.

This part of ISO 10303 specifies the use of a mathematical value to identify a physical quantity instance.

NOTE 1   This module provides the generalisation of 'representation context' necessary for use of the Mathematical Representation Schema in ISO 10303-50.

EXAMPLE 1   The temperatures are identified by the mathematical space of numbers x ∈ R, where x ≤ -273.15.

Kelvin is a mapping from the space of temperatures to the space of real numbers, which is defined by ISO.

EXAMPLE 2   The stress tensors are identified by the mathematical space of symmetric 3×3 matrices.

The mapping between this mathematical space and stress tensors is derived from:

A physical quantity space can be any measurable quantity, such as time, position within a geometric space, temperature, density, or mass.

NOTE 2   The mapping between positions within a geometric space and the space of real triples can be a simple Cartesian mapping in metres. There are alternative mappings such as (latitude, longitude and height above MLWS (Mean Low Water Spring tides)) in fathoms and feet.

EXAMPLE 3   The geometric space in which my aeroplane is at rest is a physical quantity space. The geometric space in which the earth is at rest is a different physical quantity space.

Clause 1 defines the scope of the application module and summarizes the functionality and data covered. Clause 3 lists the words defined in this part of ISO 10303 and gives pointers to words defined elsewhere. The information requirements of the application are specified in Clause 4 using terminology appropriate to the application. A graphical representation of the information requirements, referred to as the application reference model, is given in Annex C. Resource constructs are interpreted to meet the information requirements. This interpretation produces the module interpreted model (MIM). This interpretation, given in 5.1, shows the correspondence between the information requirements and the MIM. The short listing of the MIM specifies the interface to the resources and is given in 5.2. A graphical representation of the short listing of the MIM is given in Annex D.

In this International Standard, the same English language words may be used to refer to an object in the real world or concept, and as the name of an EXPRESS data type that represents this object or concept.

The following typographical convention is used to distinguish between these. If a word or phrase occurs in the same typeface as narrative text, the referent is the object or concept. If the word or phrase occurs in a bold typeface or as a hyperlink, the referent is the EXPRESS data type.

The name of an EXPRESS data type may be used to refer to the data type itself, or to an instance of the data type. The distinction between these uses is normally clear from the context. If there is a likelihood of ambiguity, either the phrase "entity data type" or "instance(s) of" is included in the text.

Double quotation marks " " denote quoted text. Single quotation marks ' ' denote particular text string values.



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