Integrated Generic Resources
- ISO 10303-41
- ISO 10303-42
- ISO 10303-43
- ISO 10303-44
- ISO 10303-45
- ISO 10303-46
- ISO 10303-47
- ISO 10303-49
The Integrated Generic Resources (see table) form the core of STEP. These are information models which describe product data in EXPRESS intependent from a certain application.
Iso 10303 | Name | Description | Status 05/02 |
41 | Fundamentals of Product Description and Support | - | IS |
- | Generic Product Description Resources | Integration core (structure and context) of STEP, via which all partial models are linked. | - |
- | Management Resources | Objects for the description of administrative data in the context of an application. | - |
- | Support Resources | General objects for product description, like identifiers, names, texts, time- and date information, measure units etc. | - |
42 | Geometric and Topological Representation | Geometry, topology, shape of 3D objects. | IS |
43 | Representation Structures | Specification of the complete structure for representing aspects of product data, like e.g. properties of products (e.g.: representation of geometric elements in a coordinate system). | IS |
44 | Product Structure Configuration | Product structure and product configuration. | IS |
45 | Materials | Material properties of a product. | IS |
46 | Visual Presentation | Representation parameters and -rules for the visual representation of product model data. | IS |
47 | Tolerances | Specifies measure-, form- and placement tolerances. | IS |
49 | Process Structure and Properties | Defines the logical order of process activities (and their parameters). | IS |
50 | Mathematical Constructs | - | FDIS |
51 | Mathematical Description | - | |
52 | Mesh-based topology | - | |
53 | Numerical Analysis | - |
IS - International Standard
FDIS - Final Draft International Standard
CD - Committee Draft
WD - Working Draft
Latest status see: http://www.nist.gov/sc5/soap/
The EXPRESS schemas defined in the ISO document 10303-41 play an exceptional role. They form the integration core, which links all Resource Models with each other and additionally defines general objects (administrative data, date- and time-stamp, measure values and units).
All other STEP data models must be lead back to the objects defined within the 40-series schemas. A valid modification is the definition of subtpyes, which
- represent a specialization and
- define restricting conditions for attributes and relations.
The introduction of additional attributes is not allowed.
These very restrictive conditions demand for very generic basic models. In numerous developments of application models, the 40-series models have proven their capability.
ISO 10303-41
- Identification and categorization of a product
- Relationships between products
- Product definition (shape representation, properties)
- Application context, in which the product is defined
- References to documents
- Actions, demand for actions, status of actions
- Certification
- Approval
- Security classification
- Validity
- Contract
- Person and organization
- Date and time
- Grouping mechanisms
- Referring to information which is defined outside the model
- Physical quantities and units
- Structure for the linkage of application and administrative data
ISO 10303-42
- Point, Vector,
- Curve (parametric, conic, defined on a parametric surface, general parametric splines, offsets, intersections)
- Surface (elementary, parametric, general parametric splines, offsets)
- Transformation operators
ISO 10303-43
- Representation context
- Representation items
- Association of representation items with one or more contexts, in which they jointly represent a concept
- Relationships between representation items
- Relationships between representations
- Re-use of representation items
ISO 10303-44
- Component and assembly relationships
- Product variations
- Structure management for the configuration of assemblies and components, which are planned for manufacturing
- Decomposition of a product to support various activities during its lifecycle
ISO 10303-45
- Specification of material properties
- Association of material properties to a product
- Qualitative and quantitative conditions for the validity of material properties
- Material properties for the faces of a product
ISO 10303-46
- Relationships between product data and visual representations
- Definition of attributes for realistic and symbolic visualizations of geometric and non-geometric elements of the product information
- Control of the approximation tolerances for geometric representation items
- Character- and symbol fonts
- Support of externally defined character- and symbol fonts
- Layer mechanisms
- Nesting of representation areas
ISO 10303-47
- Tolerances as conditions for surface characteristics of a product
- Geometric tolerances
- Plus-minus-tolerances
- Positioning features
- Identification of derived attributes (centerline, cut)
- Structure of limit-and-fit systems
ISO 10303-49
- Specification of processes
- Relationships between processes
- Validity of processes
- Relationships between process and product
- Process plan for the realization of a product
- Alternative process plans
- Resource specification
- Process conditions of the resource
- Identification of the resources, which are used by the process
- Resource properties