BS ISO 18582-1:2016 pdf download

BS ISO 18582-1:2016 pdf download.Fluid power — Specification of reference dictionary — Part 1: General overview on organization and structure
1 Scope
This part of ISO 18582 provides the basis for the preparation of a reference dictionary of standardized product properties for the area of fluid power, and for the provision of this reference dictionary and its entire contents in electronic form.
This part of ISO 18582, based on ISO 13584-42 and ISO/IEC Guide 77-2, specifies a reference dictionary of standardized product properties for the area of fluid power.
NOTE The properties are determined on the basis of standardized attributes. To ensure optimum unambiguity, the standardized properties are classified into definition classes, forming a so-called standardized “reference hierarchy”.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 80000 (all parts), Quantities and units
ISO 13584-42, Industrial automation systems and integration — Parts library — Part 42: Description methodology: Methodology for structuring parts families
ISO/IEC Guide 77-2, Guide for specification of product properties and classes — Part 2: Technical principles and guidance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13584-42 and
ISO/IEC Guide 77-2 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
NOTE Some basic definitions and principles given in ISO Guide 77-2 are provided in Annex A for information.
4 Principles of specification
4.1 Set of attributes for description of a property
Properties shall be described by attributes as given in Table 1.
NOTE The table contents are in accordance with the data model specified in ISO 13584-42, expanded where required as per ISO/IEC Guide 77-2.
4.3 Basic structure of reference dictionary
4.3.1 General
For an unambiguous specification, each property requires a defined context. In accordance with the data model, this context is provided by allocation of each property to an associated definition class. The definition class is one of the mandatory attributes of a property. When strictly applying the rules of the data model specified in ISO 13584-42, it is impossible to end up with object classes that describe objects in all detail. Therefore, a clear distinction shall be drawn between definition classes and application classes. The properties defined within the definition classes of the property dictionary can, i.e. in the sense of their defined context, be used in any application class. Within the hierarchic structure of definition classes and within the hierarchic structure of application classes, the rules of heredity, in accordance with the data model of ISO 13584-42, apply.