ISO 16757: Data structures for electronic product catalogues for building services

Transcription

1 VDI-Gesellschaft Bauen und Gebäudetechnik Overciew of ISO WG 11 meeting Toronto Manfred Pikart VDI TACOS GmbH, Münster Wolfgang Wilkes FernUniversität Hagen

2 Problem to be solved by ISO The performance and efficiency of a building services system depends on how good the components fit to the system The behaviour of a product depends on the characteristics of system into which it is installed The suitability of a product for a given system can only be analysed by simulating the whole system 2

3 Characteristics of building services catalogs Detailed technical data is required Technical properties Dynamic properties Big number of variants in catalogues Products are not listed one by one Rather: property value combination of products are described by rules (selection / configuration process) High scalability of geometry required Specific geometric forms which cannot be easily constructed from the IFC primitives 3

4 Dynamic Properties The value of a dynamic property Depends of context conditions outside of the product Can therefore not represented as a simple value in the catalogue Is represented in data sheets often as set of function curves A dynamic property Is defined in a product group standard as dependent of other properties that describe the system state (system properties) Is transferred in the catalogue as implemtentation code of a function Gets its actual value only in the application system which has to execute the function code 4

5 Dynamic properties 5

6 Selection process Selection properties are used to identify a product in a catalogue Selection properties are organised in a hierarchy Configuration function checks the validity of a given selection of properties Hierarchy and the configuration function guide the configuration process to identify the product 6

7 Geometric elements ISO 16757: Oval duct bend: plane, cylindric and toroidal surfaces Number of parameters: 7 (incl. wall-thickness) 7

8 Geometric elements ISO 16757: Oval duct bend: some parametric variants 8

9 Geometric elements For building services components catalogues parametric geometry is essential. Building services components have a number of specific forms which are difficult to model based on IFC primitives. ISO adds geometric primitives to those provided by STEP and IFC. 9

10 Catalogs and models Meta model Property definition level PG model 3 PG model 2 Common model PG model 1 (Radiator) XSD Catalog 1 Catalog 2 Catalog 3 Catalog 4

11 Catalogs and models bsdd Meta model Property definition level PG model 3 PG model 2 Common model PG model 1 (Radiator) XSD Catalog 1 Catalog 2 Catalog 3 Catalog 4

12 Organisation of the ISO series Part 1: Concepts, architecture and model This part gives the overview about the standard and the rationale for its elements and organisation. Part 2: Geometry This part defines the geometric elements which are used to represent the products in ISO catalogues. Part 3: Script language and functions This part defines the script language used in ISO for various purposes. Part 4: Cooperation with building information modelling standards This part contains IDM descriptions for ISO 16757, including process descriptions for those processes which are to be supported by the standard and it comprises the rules for mapping of product properties and the property descriptions to IFC and for defining properties semantically with IFD. Part 5: Product catalogue exchange format This part defines an exchange format in XML by which electronic catalogues can be exchanged according to the definitions of ISO The exchange format will be specified as an XML Schema Definition (XSD). Part 10 - XX Product group specific parts of ISO will define standardized properties for the product groups and the composition of the technical data model. Furthermore they determine the specific programming function- interfaces to layout, calculate and simulate the products.

13 Eclass import into bsdd (bsdd pilot project) Classification system used in some European countries Covers various product areas guage=en Is used heavily in German product exchange catalogues and by marketplaces Some segments of are now imported into the test database Using Catenda s mechanism to import a classification via an Excel-file into the bsdd Will be extended by German language