Foreword

ISO/PDTS 10303-1080 was prepared by Technical Committee ISO/TC 184, Industrial automation systems and integration, Subcommittee SC4, Industrial data.

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 interpreted constructs, application modules, application protocols, abstract test suites, implementation methods, and conformance testing. The series are described in ISO 10303-1. A complete list of parts of ISO 10303 is available from the Internet:

http://www.nist.gov/sc4/editing/step/titles/.

Annexes A and B form an integral part of this part of ISO 10303. Annexes, C, D, E, aand F are for information only.

Introduction

This application module is concerned with the specification of the nature of a compound property, that consists of several separate physical phenomena that are observed or measured.

The set of all values or magnitudes of a physical phenomenon can be regarded as a 'property space'. The set of all values or magnitudes of a combination of several separate physical phenomena can also be regarded as a single property space.

EXAMPLE - The space of triples of pressure, temperature and density is a property space.

The triple that is 200 MPa, 400 degrees Kelvin and 7000 Kg per cubic metre is an independent property definition. This independent property definition is a member of the space of triples of pressure, temperature and density.

NOTE - An independent property definition that is a member of a compound property space is often identified by a numerical tuple.

Hence the independent property definition that is 200 MPa, 400 degrees Kelvin and 7000 Kg per cubic metre, is identified by the numeric triple (200, 400, 7000) with respect to the MPa, Kelvin and Kg m^-1 scales.

Industrial automation systems and integration —
Product data representation and exchange —
Part 1081: Application module: Compound property space

1 Scope

This application module supports the definition of a compound property space, that is a list of other property spaces.

Each independent property definition within a compound property space is a corresponding list of other independent property definitions - one for each property space.

The following are within the scope of this application module:

• the definition of a compound property space as a list of other property spaces.

The following are not within the scope of this application module:

• the definition of a property space that is not formed from other property spaces;

  NOTE - The definition of an elementary property space is within the scope of the property space application module.

• an independent property definition that can be possessed by a product, activity or state.

  NOTE - An independent property definition is defined in the independent property definition application module.

• a numerical description of an independent property definition with respect to a scale.

  NOTE - The description of the independent property definition 400 degrees Kelvin by the number 400 with respect to the Kelvin scale, is within the scope of the property identification application module.

• a standard identification of a property space within a reference data library.

  NOTE - Standard instances of property space for structural analysis are defined in the property dictionary for structural analysis application module.