The BioPAX Validator 3.0.0 Release.
This is a new, re-factored and polished version, with many bug fixes and improvements in the core validation framework (API, settings, validation profiles, e.g., "notstrict" (new feature)), validation rules, auto-fix and normalization logic (which now respect user model's xml:base or allows one set own, uses Identifiers.org, etc.), and new style auto-generated developer's documentation.
PS: a paper about this will be published too.