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Introduction to namespaces

PHP classes, interfaces, and traits in Drupal are namespaced. See the Objected-oriented programming conventions for more information.

See also

Objected-oriented programming conventions

Namespace
Drupal\Core\State
Drupal\Core\StreamWrapper
Drupal\Core\StringTranslation
Drupal\Core\StringTranslation\Translator
Drupal\Core\Template
Drupal\Core\Template\Loader
Drupal\Core\TempStore
Drupal\Core\TempStore\Element
Drupal\Core\Test
Drupal\Core\Test\Exception
Drupal\Core\Test\HttpClientMiddleware
Drupal\Core\Test\RunTests
Drupal\Core\Theme
Drupal\Core\Transliteration
Drupal\Core\TypedData
Drupal\Core\TypedData\Annotation
Drupal\Core\TypedData\Exception
Drupal\Core\TypedData\Type
Drupal\Core\TypedData\Validation
Drupal\Core\Update
Drupal\Core\Updater
Drupal\Core\Utility
Drupal\Core\Validation
Drupal\Core\Validation\Annotation
Drupal\Core\Validation\Plugin\Validation\Constraint
Drupal\cron_queue_test\Plugin\Derivative
Drupal\csrf_race_test\Controller
Drupal\csrf_test\Controller
Drupal\database_statement_monitoring_test
Drupal\database_statement_monitoring_test\mysql
Drupal\database_statement_monitoring_test\mysql\Install
Drupal\database_statement_monitoring_test\pgsql
Drupal\database_statement_monitoring_test\pgsql\Install
Drupal\database_statement_monitoring_test\sqlite
Drupal\database_statement_monitoring_test\sqlite\Install
Drupal\database_test\Controller
Drupal\database_test\Form
Drupal\datetime
Drupal\datetime\Plugin\Field\FieldFormatter
Drupal\datetime\Plugin\Field\FieldType
Drupal\datetime\Plugin\Field\FieldWidget
Drupal\datetime\Plugin\Validation\Constraint
Drupal\datetime\Plugin\views\filter
Drupal\datetime\Plugin\views\sort
Drupal\datetime_range
Drupal\datetime_range\Plugin\Field\FieldType
Drupal\datetime_range\Plugin\Field\FieldWidget
Drupal\dblog\Controller
Drupal\dblog\Form
Drupal\dblog\Plugin\views\field

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