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Re: RE: Defining a language using itself

  • From: =?UTF-8?B?UGlvdHIgQmHFhHNraQ==?= <bansp@o2.pl>
  • To: xml-dev@lists.xml.org
  • Date: Mon, 12 Jan 2015 17:53:59 +0100

Re:  RE: Defining a language using itself
Hi Roger,

TEI ODD [1][2] may come relatively close to what you're asking about, especially in its "pure" version [3], with dependencies on Relax NG removed.

[1]: http://wiki.tei-c.org/index.php/ODD
[2]: http://www.tei-c.org/release/doc/tei-p5-doc/en/html/TD.html
[3]: https://github.com/TEIC/pureodd

Best regards,

Piotr


On 12/01/15 17:30, Costello, Roger L. wrote:
Here's another example of a language that is defined using the language itself:

This document defines the Augmented BNF (ABNF) using ABNF:

https://tools.ietf.org/html/rfc5234#section-4

That is the ABNF-for-ABNFs!

Neat!

/Roger

-----Original Message-----
From: Costello, Roger L.
Sent: Saturday, January 10, 2015 3:43 PM
To: xml-dev@lists.xml.org
Subject: Defining a language using itself

Hi Folks,

I think it is mind-blowing when a language is defined using the language itself.

This document defines the XML Schema language using XML Schema:

http://www.w3.org/TR/xmlschema11-1/#normative-schemaSchema

That is the XML schema-for-schemas!

This document defines the JSON Schema language using JSON Schema:

http://json-schema.org/draft-04/schema#

That is the JSON schema-for-schemas!

These two documents define the ANTLR grammar language using the ANTLR grammar:

https://github.com/antlr/grammars-v4/blob/master/antlr4/ANTLRv4Parser.g4
https://github.com/antlr/grammars-v4/blob/master/antlr4/ANTLRv4Lexer.g4

That is the ANTLR grammar-for-grammars!

Neat!

Do you know of other languages that are defined using the language itself?

/Roger

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