+Chooses a tag to label the container image based on the
+'container-tag-method' parameter using the global-jjb script
+docker-get-container-tag.sh. Use one of the following methods:
+
+If ``container-tag-method: latest``, uses the literal string ``latest``.
+
+If ``container-tag-method: stream``, uses the value of the variable ``stream``.
+
+If ``container-tag-method: git-describe``, reads the tag from the
+``git describe`` command on the repository, which requires that the repository
+has a git tag. For example, if the most recent tag is 'v0.48.1', this
+method yields a string like 'v0.48.1' or 'v0.48.1-25-gaee2dcb'.
+
+If ``container-tag-method: yaml-file``, reads the tag from the YAML file
+``container-tag.yaml`` in the docker-root directory using the top-level entry
+'tag'. Alternately specify the directory with the YAML file in parameter
+'container-tag-yaml-dir'. An example file appears next.
+
+Example container-tag.yaml file:
+
+.. code-block:: yaml
+
+ ---
+ tag: 1.0.0
+
+
+Optionally, teams can supply their own script to choose the docker
+tag. Pass the shell script path in optional configuration parameter
+'docker-get-container-tag-script' which by default is the path to
+file docker-get-container-tag.sh. The script must create the file
+'env_docker_inject.txt' in the workspace with a line that assigns a
+value to shell variable DOCKER_IMAGE_TAG, as shown next.
+
+Example env_docker_inject.txt file:
+
+.. code-block:: shell
+
+ DOCKER_IMAGE_TAG=1.0.0
+