##### SUMMARY
include_role parameter *public* description: "... vars and defaults are exposed to the playbook." The variables are not exposed to other plays in a playbook.
##### ISSUE TYPE
- Documentation Report

##### COMPONENT NAME

include_role

##### ANSIBLE VERSION

devel

##### CONFIGURATION

No changes. All defaults.

##### OS / ENVIRONMENT

> cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.1 LTS"

##### STEPS TO REPRODUCE

https://gist.github.com/vbotka/8a435e917bccc655e08cbd11b43eabd4

##### EXPECTED RESULTS

The documentation says "exposed to the playbook". This evokes the expectation the variables are available to other plays in the playbook.

```paste below
PLAY [two] ***********************************************************************************

TASK [role-two : debug] **********************************************************************
ok: [two] => {
    "variable_one": "Role One Variable"
}

PLAY [one] ***********************************************************************************

TASK [role-two : debug] **********************************************************************
ok: [one] => {
    "variable_one": "Role One Variable"
}
```

##### ACTUAL RESULTS

The variables are not available to other plays in the playbook.

<!--- Paste verbatim command output between quotes -->
```paste below
PLAY [two] ***********************************************************************************

TASK [role-two : debug] **********************************************************************
ok: [two] => {
    "variable_one": "VARIABLE IS NOT DEFINED!"
}

PLAY [one] ***********************************************************************************

TASK [role-two : debug] **********************************************************************
ok: [one] => {
    "variable_one": "VARIABLE IS NOT DEFINED!"
}
```

description:
      - The name of the role to be executed.
    type: str
    required: True
  tasks_from:
    description:
      - File to load from a role's C(tasks/) directory.
    type: str
    default: main
  vars_from:
    description:
      - File to load from a role's C(vars/) directory.
    type: str
    default: main
  defaults_from:
    description:
      - File to load from a role's C(defaults/) directory.
    type: str
    default: main
  allow_duplicates:
    description:
      - Overrides the role's metadata setting to allow using a role more than once with the same parameters.
    type: bool
    default: yes
  public:
    description:
      - This option dictates whether the role's C(vars) and C(defaults) are exposed to the playbook. If set to C(yes)
        the variables will be available to tasks following the C(include_role) task. This functionality differs from
        standard variable exposure for roles listed under the C(roles) header or C(import_role) as they are exposed at
        playbook parsing time, and available to earlier roles and tasks as well.