STEP, the Standard for the Exchange of Product Model Data, is a comprehensive ISO standard (ISO 10303) that describes how to represent and exchange digital product information.
STEP AP242 replaces AP203e2 and AP214 for CAD data. It was published in 2014 as ISO 10303-242:2014(E). A second edition is under development with new geometric capabilities and additive manufacturing setup information.
AP242 is the choice for CAD import/export. The EXPRESS schema below contains the schema definitions in AP242, AP203, AP214, AP238, and a few others. Shifting between versions can be automatically handled by STEP Tools libraries.
Update to the STEP file format published by ISO in February 2016. This adds anchors and references between files as well as zipped files and UTF-8..