ISO/PDTS 10303-1036 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 inter-preted 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.
This application module is concerned with observable or measurable quantities. The following have quantities that can be observed or measured:
a point within a product at a state;
EXAMPLE - Temperature, pressure, density, stress are quantities that can be measured at a point within a product at a state.
This is of course an idealisation. It is not possible to measure the temperature at a point for a state, because a temperature sensor has a finite size and a finite thermal capacity.
a part or feature of a product at a state;
EXAMPLE - Area and axial force are quantities that can be measured at a cross section of a beam at a state.
EXAMPLE - Thickness and bending moment (a second order tensor in 2D) and aggregate membrane force (a second order tensor in 2D) are quantities that can be measured at a fibre normal to the plane of a shell at a state.
a whole body (or product) at a state;
EXAMPLE - Volume, mass and kinetic energy are quantities that can be measured for a whole body at a state.
a point within a product for a whole activity;
EXAMPLE - Absorbed energy density is a quantity that can be measured at a point for a whole activity.
EXAMPLE - Number of stress reversals is a quantity that can be measured at a point for a whole activity.
a part or feature of a product for a whole activity;
EXAMPLE - Total mass of fluid passing through a surface is a quantity that can be measured at a cross section of a duct for a whole activity.
a whole body (or product) for a whole activity.
EXAMPLE - Total absorbed energy is a quantity that can be measured for a whole body for a whole activity.
This application module defines a particular magnitude or type of observable or measurable aspect. This is called an 'independent property definition'.
NOTE - An indpendent property definition is a class that an individual product, activity or state can be a member of. The independent property definition indicates the nature of an observable or measurable aspect of an individual product, activity or state.
The temperature of 400 degrees Celsius is an independent property definition. The widget with serial number 1234 at 10:30 on 1998-11-05 is a member of this class.
A property space is a class that an independent property definition can be a member of. The class indicates the nature of the physical phenomenon that is observed or measured.
Temperature is a class. The temperature of 400 degrees Celsius is a member of this class.
The following are within the scope of this application module:
the distinction between a point property definition and a range property definition;
EXAMPLE - 400 degrees Kelvin is a point property definition. 400 to 410 degrees Kelvin is a range property definition.
The statement that a thing has a temperature of 400 degrees Kelvin is almost certainly a loose statement with an implied tolerance. The statement that a thing has a temperature within the range 400 to 410 degress Kelvin is more rigorous.
the symmetries possessed by an independent property definition.
EXAMPLE - The thermal conductivity at each point within each widget of type XYZ is isotropic. This statement can be made about the thermal conductivity, whether or not it has a numerical description and irrespective of the form of that description.
A description of an isotropic thermal conductivity can take advantage of the symmetry, and can consist of a single real value. However a description need not take advantage of the symmetry and can consist of a symmetric matrix of real values, in which each of the diagonal terms is the same and each of the off-diagonal terms is zero.
The following are not within the scope of this application module:
a relationship between an independent property definition and the property space it is a member of;
NOTE - This relationship is within the scope of the property space application module.
NOTE - A property distribution is within the scope of the property distribution application module.
a relationship between an independent property definition and a product, activity or state that possesses it;
NOTE - This relationship is within the scope of the possession of property 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.
If you have a comment on this module, please send it to the support team