Norm

NEN-ISO 10303-108:2005 en

Industrial automation systems and integration - Product data representation and exchange - Part 108: Integrated application resource: Parameterization and constraints for explicit geometric product models

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Over deze norm

Status Ingetrokken
Aantal pagina's 154
Commissie Informatie-integratie en interoperabiliteit
Gepubliceerd op 01-02-2005
Taal Engels
This part of ISO 10303 specifies the resource constructs for the representation of model parameters and constraints, together with the mechanisms necessary for associating them with geometric or other elements of transferred models. The use of these capabilities potentially allows certain aspects of the behaviour of a model in its originating system to be conveyed together with the basic model itself. The intention in transferring this additional information is to provide the receiving system with data that will enable it to reconstruct corresponding behavioural characteristics in the model following the transfer. Ideally, this will enable the model to be edited in the receiving system just as as though it had been created there. That would not be possible without the exchange of what is known as design intent information. This part of ISO 10303 enables the capture and transfer of an important aspect of design intent. Clause 4 defines a means for the association of model parameters with individual quantities in the model, to provide for the editing of dimensional values and other variable attributes. Clause 5 provides for the modelling of constraint relationships in terms of mathematical relationships among model parameters. Such constraints are not restricted to the modelling of product shape; they are designed to be applicable in any situation where it may be useful to capture and transfer mathematically specified relationships. Clause 5 also defines a class of descriptive (non-mathematical) constraints. Clause 6 defines avariational representation, containing a model together with all the associated parameters and constraints that potentially facilitate its effective editing following a transfer. Clause 7 defines specialized representations for a set of explicit geometric constraints applicable specifically to elements of shape models of the boundary representation and closely related types. These are subtypes of the descriptive constraints specified in clause 5. Finally, clause 8 provides representations for two-dimensional sketches, which form the basis of many shape construction methods in CAD modelling. Sketches are an important application area for the parameterization and constraint information defined in earlier clauses. The capabilities provided in this schema may also be used as a basis for the representation of parameterized drawings. The following are within the scope of this part of ISO 10303: - Parameterization of models through the association of variables with quantities occurring in them; - Constraints defining mathematical relationships between parameters; - Constraints on models expressed as relationships between their constituent elements or attributes of those elements; - Association of parameters and constraints with models at therepresentation level, to create variational models of products, plans, processes or organizations; SO 2005-All rights reserved 1 - Specific representations for the geometric constraints commonly used in product shape modelling; - Applications of parameterization and constraints to two- and three-dimensional shape models, in particular two-dimensional geometric sketches; - Representation of models that are incompletely defined in the sense that certain values in the model may be regarded as not fully constrained.

Details

ICS-code 25.040.40
Nederlandse titel Industrial automation systems and integration - Product data representation and exchange - Part 108: Integrated application resource: Parameterization and constraints for explicit geometric product models
Engelse titel Industrial automation systems and integration - Product data representation and exchange - Part 108: Integrated application resource: Parameterization and constraints for explicit geometric product models

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