  Process mining assumes the existence of an event log where each event refers
to a case, an activity, and a point in time. XES is an XML based IEEE approved
standard format for event logs supported by most of the process mining tools.
JSON (JavaScript Object Notation) is a lightweight data interchange format. In
this paper, we present JXES, the JSON standard for the event logs and also
provide implementation in ProM for importing and exporting event logs in JSON
format using 4 different parsers. The evaluation results show notable
performance differences between the different parsers (Simple JSON, Jackson,
GSON, Jsoninter).
