anchor.diff:  and sends an `*ImageStreamMapping*` to OpenShift. This informs OpenShift of the
   image's namespace, name, tag, and Docker metadata. OpenShift uses this
   information to create a new image (if it does not already exist) and to tag the
  -image into the image stream.
  +image into the image stream.  OpenShift stores complete metadata about each
  +image (e.g., command, entrypoint, environment variables, etc.). Note that images
  +in OpenShift are immutable.
   
   
   The example `*ImageStreamMapping*` below results in an image being tagged as
  
positive.code: 
  == Image Streams
  
  An _image stream_ is similar to a Docker image repository in that it contains
  one or more link:containers_and_images.html#docker-images[Docker images]
  identified by tags. An image stream presents a single virtual view of related
  images, as it may contain images from:
  
  . Its own image repository in OpenShift's integrated Docker Registry
  . Other image streams
  . Docker image repositories from external registries
  
  OpenShift stores complete metadata about each image (e.g., command, entrypoint,
  environment variables, etc.). Images in OpenShift are immutable.
  
  OpenShift components such as builds and deployments can watch an image stream
  and receive notifications when new images are added, reacting by performing a
  build or a deployment, for example.
  
  .Image Stream Object Definition
  ====
  
negative.code: 
  ====
  
  [[image-stream-mappings]]
  
  === Image Stream Mappings
  