# Glossary
| checker type | A type of the check to be executed. Like `lines_present` |
| checker object | The object being checked, like a file |
| checker | A concrete instance of a check to be executed, like an `lines_present` for the object `~/.bashrc` |
| check | A concrete execution of a checker |
## Naming conventions
The name of a checker type consist of `<noun>_<adjective>`.
So ie `file_present` can be read as `file is present` and grammatical analysed as:
- `file` – noun (subject of the sentence).
- `is` – verb (linking verb, present tense, 3rd person singular of to be).
- `present` – adjective (subject complement, describing the state of the file).