The MBx Interoperability Forum is significantly improving STEP translator quality and decreasing translator time-to-market
MBx Interoperability Forum

Recommended Practices Archive

Product and Manufacturing Information (PMI)
PMI Polyline Presentation (AP203/AP214) v2.3, PDF (current)2014-10-13
v1.0, PDF2008-06-16
Geometric and Dimensional Tolerances HTML
Hosted on WikiSTEP
Dimensions, Dimensional and Geometric Tolerances PDF2006-12-06
GD&T Usage Guide v2.0, WORD2004-12-76