• Download the XES standard definition here.
• Download the OpenXES developer guide here.
• View the Javadoc for the latest OpenXES library here.
• Read the license for OpenXES (LGPL) here.
• View the XSD definition for the core XES XML serialization format.
• View the XSD definition for the XESEXT extension serialization format.
• OpenXES uses the Spex library for XML serialization.

Standard extensions (in XESEXT format, for more information please consult the developer guide):

• Concept extension
• Time extension
• Lifecycle extension
• Organizational extension
• Semantic extension