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.