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A STEP-file is ASCII text with the format defined in ISO 10303-21 Clear Text Encoding of the Exchange Structure. [2] ISO 10303-21 defines the encoding mechanism for representing data conforming to a particular schema in the EXPRESS data modeling language specified in ISO 10303-11. A STEP-File is also called p21-File and STEP Physical File.
The basis for STEP was the Product Data Exchange Specification (PDES), which was initiated during the mid-1980's and was submitted to ISO in 1988. [ 4 ] [ 5 ] The Product Data Exchange Specification (PDES) was a data definition effort intended to improve interoperability between manufacturing companies, and thereby improve productivity.
The files use Microsoft's Rich Text Format (RTF) with special STEP tags added. [2] While not fully open format, as was sometimes claimed, the specifications have been publicly released, enabling third parties to write their own tools to create, edit, or view STEP resources. There are restrictions on the use of the logo, and commercial use of ...
An IGES file is composed of 80-character ASCII records, a record length derived from the punched card era. Text strings are represented in "Hollerith" format, the number of characters in the string, followed by the letter "H", followed by the text string, e.g., "4HSLOT" (this is the text string format used in early versions of the Fortran language).
IFC defines multiple file formats that may be used, supporting various encodings of the same underlying data. [7] IFC-SPF is a text format defined by ISO 10303-21 ("STEP-File"), where each line typically consists of a single object record, and having file extension ".ifc". This is the most widely used IFC format, having the advantage of compact ...
MEI – Music Encoding Initiative file format that attempts to encode all musical notations; MIDI – MIDI file format that is a music sheet for instruments; MUS, MUSX – Finale sheet music file; MXL, XML – MusicXML standard sheet music exchange format; MSCX, MSCZ – MuseScore sheet music file; SMDL – Standard Music Description Language ...
EXPRESS is a standard for generic data modeling language for product data. EXPRESS is formalized in the ISO Standard for the Exchange of Product model STEP (ISO 10303) , and standardized as ISO 10303-11.
A PLMXML-structure could link to the model data in another file (an External Representation), or the data can be embedded within the Representation element in the XML file (an InternalRepresentation). STEP AP 242 XML - An ISO Standard, with allows to represent assembly, meta, kinematic data etc. and to link to the model data as external ...