are there public references for Express and Step specifications? #454

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1. brlcad commented on Jul 27, 2023

   

   brlcad

   on Jul 27, 2023

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   One of our sponsors paid the $10k+ fees to ISO for us over 10 years ago, so we do have the specs for several of the most important APs, but they're not public / open access. They can only be used within our community by contributors.
2. TRThurman commented on Jul 27, 2023

   

   TRThurman

   on Jul 27, 2023 via email

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   The grammars are publicly available on the Express engine site.Express Engine / Express Engine Commit Logsourceforge.netAnd:EXPRESS language referencesexpresslang.org(Note that there are structures permitted by the bnf that are not permitted by the text of ISO 10303-11.)Sent from my iPhoneOn Jul 27, 2023, at 10:50 AM, Carter Tazio Schonwald ***@***.***> wrote: hello, I just found out about this project, are the grammars in this code base the only public / open access specifications for Express and STEP files? (i'm interested in building my own open source tooling for STEP CAD, and i'm not sure what has public access documents, or which specifications i'd have to buy from ANSI or ISO) —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

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3. cartazio commented on Jul 27, 2023

   

   cartazio

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   this is all super helpful. I'm pretty comfortable with programming language engineering things, so the express specification language actually looks shockingly well designed from my quick looks.

   https://www.expresslang.org/learn/express/ this site right? I couldn't find the other one you mentioned

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4. TRThurman commented on Jul 27, 2023

   

   TRThurman

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   Sent from my iPhoneOn Jul 27, 2023, at 6:43 PM, Carter Tazio Schonwald ***@***.***> wrote: this is all super helpful. I'm pretty comfortable with programming language engineering things, so the express specification language actually looks shockingly well designed from my quick looks. https://www.expresslang.org/learn/express/ this site right? I couldn't find the other one you mentionedYes —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you commented.Message ID: ***@***.***>
5. brlcad commented on Jul 28, 2023

   

   brlcad

   on Jul 28, 2023

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   @cartazio It should go without saying, but you're more than welcome to build new STEP tooling within the context of the STEPcode project. We're always interested having new folks join in development. You'll find there's a libexpress for part 11, a STEP Data Access Interface (SDAI) conforming generator that generates an AP parser library given one of the STEP schemas (e.g., AP203), and more, but you're also not constrained by what's already there if you have new things you want to work on.

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6. cshorler commented on Jul 28, 2023

   

   cshorler

   on Jul 28, 2023 via email

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   Should also be noted - before starting anything check no one already has something in progress, I have a number of things I don't currently find time to progress on!

   …

   On Fri, 28 Jul 2023, 08:19 Christopher Sean Morrison, < ***@***.***> wrote: @cartazio <https://github.com/cartazio> It should go without saying, but you're more than welcome to build new STEP tooling within the context of the STEPcode project. We're always interested having new folks join in development. You'll find there's a libexpress for part 11, a STEP Data Access Interface (SDAI) conforming generator that generates an AP parser library given one of the STEP schemas (e.g., AP203), and more, but you're also not constrained by what's already there if you have new things you want to work on. — Reply to this email directly, view it on GitHub <#454 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAHKKMASPAYK6J5HPCU2SILXSNRYTANCNFSM6AAAAAA22JFMMI> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>