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Compatibility with legacy annotation is provided by the #Legacy support module.
uimaj_core
Dependes on uimaj_core 2.4.1 version
@ConfigurationParameter
The default value for the mandatory attribute now is tru.
META-INF/org.uimafit folder
Now the META-INF/org.uimafit was renamed to META-INF/org.apache.uima.fit
Legacy support module
The compatibility layer should allow you to migrate to uimaFIT 2.0.0 without breaking anything. You should then be able to gradually change the codebase to be compatible with uimaFIT 2.0.0. As far as my tests go, uimaFIT 1.x and 2.0.0 can coexist peacefully on the classpath (and indeed both need to be on the classpath in order to use the legacy support module).
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