Milestone 2, December 2011

AF and ER languages are now supported in addition to PD
A utility script "sbgnutil" has been added for validating SBGN-ML, and for converting M1 to M2
Support for high-level validation using Schematron (in addition to low-level XSD validation)
The schema is now fully extensible through the Extension element
Java and C++ bindings have been updated

Major API Changes between Milestone 1 and Milestone 2:

Arcs must have id's, so you must call arc.setId() before writing out.
Map must have a language attribute, so you must call Map.setLanguage() before writing out
The GlyphClazz, ArcClazz and Language enums have been added to help ensure correctness of string values.
An arc can now have multiple subGlyphs, so a construct like arc.setGlyph(g) must be replaced with arc.getGlyph().add(g) or similar.
The glyph class "stiochiometry" has been renamed to "cardinality". The use of stoichiometry as a glyph class is no longer allowed.
New classes and methods have been added to support the AF and ER languages, such as Callout, Entity, etc.
Please note that two utility classes have been added to help backwards compatibility, namely: ConvertMilestone1To2 and SbgnVersionFinder

Milestone 1, January 2011

First public release
Support reading / writing of the PD language only. AF and ER are not supported.
Graphics are stored only at the global level, i.e. the bounding boxes of glyphs can be stored, but other graphical properties such as color and line-thickness are not supported.
Support low-level validation using XSD Schema
Both java and C++ bindings are available