# AQL / ADL BNF specifications...

**Category:** [Technical (archive)](https://discourse.openehr.org/c/technical-archive/156)
**Created:** 2013-07-15 16:00 UTC
**Views:** 1
**Replies:** 4
**URL:** https://discourse.openehr.org/t/aql-adl-bnf-specifications/15257

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## Post #1 by @ANASTASIOU_A1

Hello everyone

I am primarily interested in the BNF form of AQL and i was wondering if
it would be available from somewhere on the project's github space
\(?\)\.\.\.\(so far i can not locate it\. \)

Also, the java reference implementation included the javacc definitions
for parsing dADL and cADL but is there a stand\-alone BNF specification
for ADL 1\.5 now?

Looking forward to hearing from you
Athanasios Anastasiou

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## Post #2 by @Seref

As far as I know Marand open sourced their Antlr grammar for aql, though I did not download it. it would probably be much more helpful than a bnf form alone. google is your friend :)

the bnf specification for adl 1.5 is in Eiffel form, but I guess someone produced an html version of it or something nice. I suggest you clone Tom's eiffel code and look for it.

Regards
Seref

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## Post #3 by @ANASTASIOU_A1

Thank you very much for the rapid response Seref\!\.\.\. Indeed, it was a
matter of using the correct search terms:

ANTLR AQL:
http://www.openehr.org/wiki/display/spec/ANTLR+AQL+grammar

and yes\.\.\.i did forget the Eiffel work, but anyway could only get as far as:
https://github.com/wolandscat/EOMF/tree/master/parsers/odin

\( The validator \.html in that location is probably what i am after but
there is no mention of it being the 1\.5 version\.\.\.\)

All the best
Athanasios Anastasiou

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## Post #4 by @thomas.beale

> Hello everyone
>
> I am primarily interested in the BNF form of AQL and i was wondering if
> it would be available from somewhere on the project's github space
> \(?\)\.\.\.\(so far i can not locate it\. \)
>
> Also, the java reference implementation included the javacc definitions
> for parsing dADL and cADL but is there a stand\-alone BNF

See bottom of
http://www.openehr.org/wiki/pages/viewpage.action?pageId=196633

\- thomas

> Looking forward to hearing from you
> Athanasios Anastasiou
>
> This email and any files with it are confidential and intended solely for the use of the recipient

to whom it is addressed\. If you are not the intended recipient then copying, distribution or other
use of the information contained is strictly prohibited and you should not rely on it\. If you have
received this email in error please let the sender know immediately and delete it from your
system\(s\)\. Internet emails are not necessarily secure\. While we take every care, Plymouth
University accepts no responsibility for viruses and it is your responsibility to scan emails and
their attachments\. Plymouth University does not accept responsibility for any changes made
after it was sent\. Nothing in this email or its attachments constitutes an order for goods or
services unless accompanied by an official order form\.

---

## Post #5 by @ANASTASIOU_A1

Great\! Thank you very much Thomas\.\.\.

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**Canonical:** https://discourse.openehr.org/t/aql-adl-bnf-specifications/15257
**Original content:** https://discourse.openehr.org/t/aql-adl-bnf-specifications/15257