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Xtext/Documentation/API
< Xtext | Documentation
Binary but not source Compatibility
Xtext versions with minor increments are *binary compatible* with early releases of the same major version
That is you will be able to run any code, which was developed *and compiled* against API from 2.x with any 2.y (where y>=x) version. However you might run into compatibility problems if you try to compile or even regenerate source code which was developed against a previous version, because only micro increments (i.e. 2.x.y -> 2.x.z , where z >= y ) are also source compatible.
Only if the major version increments API might be removed, replaced or changed in *binary incompatible* ways.