Library_expressions
ISO13584_library_expressions_schema
Overview
The _library_expressions_schema extends the iso13584_expressions_schema to allow data modellers to describe mathematical expressions using the data types defined in the iso13584_iec61360_dictionary_schema. There are three new data types addressed by this schema: level_spec, entity, and class. When expressions are modelled according to this schema, it is possible to exchange the resulting dictionary using STEP's physical file format (ISO 10303-21).
Communicating via the web
In order to convey the contents of the _library_expressions_schema, several files have been made available on this web-site.
- library_expressions.gif
- This file shows an EXPRESS-G representation of the iso13584_library_expressions_schema. This image is viewable on-line, but requires scrolling due to the large size of the image.
- libexpres.ps
- This file contains a 600dpi postscript version of the EXPRESS-G diagram. If you have the capability of printing 8.5x11" postscript files at 600 dpi, this image can serve as a road map to help navigate the on-line version "dictionary_schema.gif".
- library_expressions.vsd
- This is the source document for the above two images. It was generated using the EXPRESS-G template in Visio Professional version 5.0, but the file has been saved in Visio version 4 format. This image is intended to be plotted on ANSI E-size paper (34x44 inches).
- g_m_iim.exp
- This ASCII file contains the long-form EXPRESS for the iso13584_g_m_iim_schema. This schema inports all of the iso13584_library_expressions_schema and was used as reference in generating the EXPRESS-G diagram.