Overview
The scion-core-legacy module is a drop-in replacement for the scion-core module.
Versions of scion-core before 2.x implemented a slightly different semantics, described here and here. These semantics have now been deprecated in favor of the official SCXML semantics described in Appendix D of the specification. A comparison of differences between these two semantics can be found here.
If you require support for scion-core semantics before 2.x, the this module provides an interpreter that implements these legacy semantics.