ISO/TC 184/SC 4/JWG 24 - Joint ISO/TC 184/SC 4 - IEC SC3D WG: Use of IEC CDD for ISO data dictionaries and ontologies

ISO 13584-32:2010 specifies an XML-based exchange structure for ISO 13584 compliant data. This exchange structure is called OntoML.

ISO 13584-42:2010 specifies the principles to be used for defining characterization classes of parts and properties of parts which provide for characterizing a part independently of any particular supplier-defined identification. ISO 13584-42:2010 specifies : — the capability to model constraints on properties by restricting their domain of values; — the capability to model and distinguish characterization classes and categorization classes; — the capability to model aggregation and composition using a single resource mechanism; — the capability to describe strings that carry external references; — the capability to connect classes that belong to different class hierarchies.

ISO/TS 13584-35:2010 defines the spreadsheet data structure for both dictionary and library, where CSV (comma separated values) format is used for ISO 13584 compliant dictionary and library exchange. The unique identification of a dictionary entry allows it to be referenced unambiguously from any application. Definitions and identifications of dictionary entries consist of instances of the EXPRESS entity data types defined in the common dictionary schema, or in its extensions defined in the logical series of parts of ISO 13584.

ISO 13584-501:2007 specifies the requirements for an ISO-registered reference dictionary for measuring instruments with their properties and domains of values. ISO 13584-501:2007 also establishes and specifies the behaviour of a registration authority whose role is to develop, maintain and update this ISO-registered reference dictionary for measuring instruments. These measuring instruments include environment measuring instruments and laboratory measuring instruments. The reference dictionaries series of parts of ISO 13584 specifies ontologies for representing the entities of an application domain, together with their descriptive properties and domains of values. Each entity, property or domain of values constitutes an entry of a dictionary that constitutes the formal and computer sensible representation of the specified ontology. It is associated with a computer sensible and human readable definition and with a computer sensible identification. The unique identification of a dictionary entry allows it to be referenced unambiguously from any application. Definitions and identifications of dictionary entries consist of instances of the EXPRESS entity data types defined in the common dictionary schema, or in its extensions defined in the logical series of parts of ISO 13584.

ISO 13584-511:2006 specifies a reference dictionary for representing fasteners with their properties and domains of values, as they are described in the various ISO mechanical fastener standards. These fasteners include bolts, screws, nuts, rivets, pins, washers etc. The reference dictionaries series of parts of ISO 13584 specify ontologies for representing the entities of an application domain, together with their descriptive properties and domains of values. Each entity, property or domain of values constitutes an entry of a dictionary that is the formal and computer sensible representation of the specified ontology. It is associated with a computer sensible and human readable definition, and with a computer sensible identification. Identification of a dictionary entry allows for unambiguous reference from any application. Definitions and identifications of dictionary entries consist of instances of the EXPRESS entity data types defined in the common dictionary schema, or in its extensions defined in the logical series of parts of ISO 13584.

ISO 13584-102:2006 specifies a representation category, called ISO10303_rep. This representation category captures the generic concepts used to describe the representation of a product in ISO 10303 application protocols. ISO 13584-102:2006 also defines how representations that belong to this representation category can be associated with any of the items defined in a parts library, and can be exchanged within a library exchange context by means of ISO 10303 compliant data repositories.

ISO 13584-25:2004 provides generic EXPRESS resource constructs that support the description of aggregate data types and values occurring in supplier libraries. It also contains an integrated EXPRESS information model for representing supplier libraries for the purpose of exchange. This integrated information model integrates the above resource constructs with other EXPRESS resource constructs from different parts of ISO 13584 and ISO 10303 into one single schema. Supplier libraries may consist of definitions and of representations of families of parts. They may also define new representation categories. Supplier libraries may consist only of dictionary elements with or without aggregate data types, or they may also contain explicit specifications of the sets of permitted instances. When used together with view exchange protocols, this integrated information model also permits the exchange of one or several representation categories for the parts defined in a parts library. The following are within the scope of ISO 13584-25:2004: generic resource constructs for representing aggregate data types. Aggregate data types and values are modelled according to the definition of aggregate data types of the EXPRESS language (ISO 10303-11); generic resource constructs for representing aggregate values; generic resource constructs for representing assembled parts that may contain an unlimited number of constituent components; a library integrated information model that provides for modelling and exchanging supplier libraries that contain properties whose values may be aggregate-structured, and whose possible class extensions are explicitly described as sets of instances. The following are outside the scope of this part of ISO 13584-25:2004: representation of expressions and variables; implicit description of the set of permitted instances of a class by means of constraints; specification of a software system able to manage supplier libraries represented according to the information models defined in ISO 13584-25:2004.

ISO 13584-24:2003 provides generic EXPRESS resource constructs that support the description of different kinds of information about supplier libraries. It also contains a set of integrated EXPRESS information models for representing supplier libraries for the purpose of exchange. These integrated information models integrate EXPRESS resource constructs from different parts of ISO 13584 and ISO 10303 into a single schema. Three integrated EXPRESS information models are defined in ISO 13584-24:2003. They permit respectively the exchange of libraries which consist either of definitions of families of parts, representations of families of parts or definitions of new representation categories that may be provided for any family of parts. These integrated EXPRESS information models contain provisions that permit a supplier library to reference external files. For each integrated EXPRESS information model, ISO 13584-24:2003 specifies which formats are allowed for these external files. Other external file formats are defined in the view exchange protocol series of parts of ISO 13584.

ISO 13584-101:2003 specifies a particular representation category, called basic_geometry. This representation category captures the generic concept of the shape of a part. It may be associated with any of the items defined in a parts library. ISO 13584-101:2003 also defines how representations that belong to this representation category may be exchanged within a library exchange context by means of FORTRAN programs compliant with ISO 13584-31:1999, or, by case of separate agreement between the sender and the receiver, by means of any other parametric formats.

This part of ISO 13584 specifies a supplier code to identify the information suppliers of the contents of a library and, when the content of this library was provided in a standard document, a code that identifies this standard document. The following are within the scope of this part of ISO 13584: — a code to identify the supplier of information contained in a parts library, and — a code to identify a standard document when the content of a parts library are defined in a standard document. The following is outside the scope of this part of ISO 13584: — a code to identify the supplier of a part. NOTE The supplier code enables the user of a library to trace the supplier of any information about a part that has an entry in the library and to trace the data given by a particular information supplier.

This part of ISO 13584 specifies an application programming interface that enables an application program to generate geometric models that are independent of the target user system. The interface allows portability of programs that describe parametric shape representations of parts families held in an ISO 13584 parts library. The following are within the scope of this International Standard: — programs to generate geometric representations within a modelling system that are independent of the target system, — programs that specify geometric representations that are created through constraint-based geometric definitions, — programs that structure geometric representations created independently of the target system, — programs that specify presentation style attributes for symbolic visualisation of representations created, — programs that support technical drawing standard conventions for shape representation, including a 2D hidden line mechanism. The following are outside the scope of this International Standard: — The precise control of the image to be displayed on the receiving system devices, — The precise definition of the data that shall be created on the receiving system, — The storage of a parametric model on the receiving system.

This part of ISO 13584 specifies: — an EXPRESS schema for generic expressions; — an EXPRESS schema for expressions, that models the subset of the allowed expressions in the EXPRESS language defined in ISO 10303-11 that corresponds to integer, real, Boolean and string data types. This schema uses the resources defined in the generic expression schema. The following are within the scope of this part of ISO 13584: — the exchange of expressions that involve both constants and variables; — the function that checks whether or not a numeric expression should evaluate to an integer value; — the constraints which ensure that an expression is semantically correct; — the computation of the variables or functions used in an expression; — the function that checks if an expression may be mapped on to the SQL query language. The following are outside the scope of this part of ISO 13584: — the assignment of values to variables within some context; — the triggering mechanism that computes the value of an expression in a given context.