 .. Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at

 ..   http://www.apache.org/licenses/LICENSE-2.0

 .. Unless required by applicable law or agreed to in writing,
    software distributed under the License is distributed on an
    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, either express or implied.  See the License for the
    specific language governing permissions and limitations
    under the License.

Core Concepts
=============================

Here you can find detailed documentation about each one of the core concepts of Apache Airflow® and how to use them, as well as a high-level :doc:`architectural overview <overview>`.

**Architecture**

.. toctree::
    :maxdepth: 2

    overview


**Workloads**

.. toctree::
    :maxdepth: 2

    dags
    dag-run
    tasks
    operators
    sensors
    taskflow
    resumable-tasks
    executor/index
    auth-manager/index
    multi-team
    objectstorage
    backfill
    message-queues

**Communication**

.. toctree::
    :maxdepth: 2

    xcoms
    variables
    params

**Task and Asset State Store**

.. toctree::
    :maxdepth: 2

    task-and-asset-state-store
    task-state-store
    asset-state-store

**Debugging**

.. toctree::
    :maxdepth: 1

    debug
