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NOTE: Since 2022 this hosting of PLEXIL is deprecated. PLEXIL has moved to GitHub at
https://github.com/plexil-group/plexil. Documentation is found at
https://plexil-group.github.io/plexil_docs. Please use these new locations.
PLEXIL is a plan execution language and technology developed by NASA and used in automation and autonomy applications at NASA and in the public sector. This software includes compilers for the language, the executive (runtime environment), and related tools....