The ``validate-modules`` tool has a `schema.py <https://github.com/ansible/ansible/blob/devel/test/lib/ansible_test/_data/sanity/validate-modules/validate_modules/schema.py>`_ that is used to validate the YAML blocks, such as ``DOCUMENTATION`` and ``RETURNS``.
deprecation-mismatch Documentation Error Module marked as deprecated or removed in at least one of the filename, its metadata, or in DOCUMENTATION (setting DOCUMENTATION.deprecated for deprecation or removing all Documentation for removed) but not in all three places.
doc-choices-do-not-match-spec Documentation Error Value for "choices" from the argument_spec does not match the documentation
doc-choices-incompatible-type Documentation Error Choices value from the documentation is not compatible with type defined in the argument_spec
doc-default-does-not-match-spec Documentation Error Value for "default" from the argument_spec does not match the documentation
doc-default-incompatible-type Documentation Error Default value from the documentation is not compatible with type defined in the argument_spec
illegal-future-imports Imports Error Only the following ``from __future__`` imports are allowed: ``absolute_import``, ``division``, and ``print_function``.
import-before-documentation Imports Error Import found before documentation variables. All imports must appear below ``DOCUMENTATION``/``EXAMPLES``/``RETURN``/``ANSIBLE_METADATA``
import-error Documentation Error ``Exception`` attempting to import module for ``argument_spec`` introspection
import-placement Locations Warning Imports should be directly below ``DOCUMENTATION``/``EXAMPLES``/``RETURN``/``ANSIBLE_METADATA`` for legacy modules
imports-improper-location Imports Error Imports should be directly below ``DOCUMENTATION``/``EXAMPLES``/``RETURN``/``ANSIBLE_METADATA``
incompatible-choices Documentation Error Choices value from the argument_spec is not compatible with type defined in the argument_spec
incompatible-default-type Documentation Error Default value from the argument_spec is not compatible with type defined in the argument_spec
invalid-argument-spec Documentation Error Argument in argument_spec must be a dictionary/hash when used
invalid-argument-spec-options Documentation Error Suboptions in argument_spec are invalid
invalid-documentation Documentation Error ``DOCUMENTATION`` is not valid YAML
invalid-documentation-options Documentation Error ``DOCUMENTATION.options`` must be a dictionary/hash when used
invalid-examples Documentation Error ``EXAMPLES`` is not valid YAML
invalid-extension Naming Error Official Ansible modules must have a ``.py`` extension for python modules or a ``.ps1`` for powershell modules
invalid-metadata-status Documentation Error ``ANSIBLE_METADATA.status`` of deprecated or removed can't include other statuses
invalid-metadata-type Documentation Error ``ANSIBLE_METADATA`` was not provided as a dict, YAML not supported, Invalid ``ANSIBLE_METADATA`` schema
no-default-for-required-parameter Documentation Error Option is marked as required but specifies a default. Arguments with a default should not be marked as required
nonexistent-parameter-documented Documentation Error Argument is listed in DOCUMENTATION.options, but not accepted by the module
option-incorrect-version-added Documentation Error ``version_added`` for new option is incorrect
option-invalid-version-added Documentation Error ``version_added`` for new option is not a valid version number
parameter-invalid Documentation Error Argument in argument_spec is not a valid python identifier
parameter-invalid-elements Documentation Error Value for "elements" is valid only when value of "type" is ``list``
implied-parameter-type-mismatch Documentation Error Argument_spec implies ``type="str"`` but documentation defines it as different data type
parameter-type-not-in-doc Documentation Error Type value is defined in ``argument_spec`` but documentation doesn't specify a type
parameter-state-invalid-choice Parameters Error Argument ``state`` includes ``get``, ``list`` or ``info`` as a choice. Functionality should be in an ``_info`` or (if further conditions apply) ``_facts`` module.
