2018-02-25
* Removed flow-type syntax: parenthesis and commas.
2017-10-06
* Some rules (EBNF) corrected * Graph syntax corrected
2015-2016
* Level 2 production: ":" path * Parenthesis (flow) based syntax removed
2014-01-20
* Metainfo key removed * Level 2 production: #=relative_path * Productions more accurate
2011-09-20
* Level 2 simplified: #{N) * Deleted '--' as break. * Production 1 simplified (asume valid chars) * Short form for tables not included because it ads confusion in case of cycles
2005-04-03
* Some descriptive text added. * Defined a new EOS sequence consisting of two dashes. * Make optional the spaces around '(', ')' and ',' 2004-06-14
* Tabs and spaces can not be intermixed in indentation.
2004-03-05
* Comments, meta-information added. * Semicolons deleted, comma chages meaning. * Round-tripping chapter added. * Some productions commented.
2003-11-17
New cycle productions (were &{} and {}). * Unicode BOM mandates Unicode stream. * Implementor decides whether he/she needs level 2.
2003-09-02
* Initial release
2005-12-15
* Initial release
2014-01-20
[*], [*] deleted. * Productions better specified. * Path is written in Unicode. * Text simplified
2003-06-14
* A path is a concatenation of OGDL expressions.
2003-09-02 Initial release
This specification is not stable. Changes are not recorded here.