ISO 10303-21 STEP

Where can I get more details(entities, functions,etc.) about ISO 10303-21 STEP files?

Volker's picture

In Wikipedia http://en.wikipedia.org/wiki/ISO_10303 you find several links, eg:
* STEP APPLICATION HANDBOOK ISO 10303 VERSION 3 http://www.tc184-sc4.org/SC4_Open/SC4_Standards_Developers_Info/Files/ST...
* Especially on Part 21: http://en.wikipedia.org/wiki/ISO_10303-21

Mark's picture

Here's a program that will generate a Part 21 file parser from EBNF.
http://code.google.com/p/sebnf2pars/

You might also look at the steptools website.
http://www.steptools.com and
http://www.steptools.com/support/stdev_docs/express/index.html

siyamalan's picture

I want to build a reader for STEP file.
Where can I get more informations about STEP schema?
For example I want to know the details of the following STEP entities,rules and types,

ENTITY face_based_surface_model;
ENTITY face_bound;
ENTITY face_outer_bound;
ENTITY face_surface;
ENTITY faceted_brep;
ENTITY faceted_brep_shape_representation;

RULE product_definition_for_class_notation;
RULE product_definition_for_design_still_water_shear_force_values;
RULE product_definition_for_expiry_date;
RULE product_definition_for_flag_state;

TYPE electric_current_measure;
TYPE external_identification_item;
TYPE founded_item_select;
TYPE geometric_set_select;