anchor.diff:  
   . Install the Cluster Logging Operator by creating the following objects:
   
  -.. Create the Subscription object:
  +.. Create an Operator Group object YAML file (for example, `eo-og.yaml`) for the Elasticsearch operator:
  ++
  +[source,yaml]
  +----
  +apiVersion: operators.coreos.com/v1
  +kind: OperatorGroup
  +metadata:
  +  name: openshift-operators-redhat
  +  namespace: openshift-operators-redhat <1>
  +spec: {}
  +----
  +<1> You must specify the `openshift-operators-redhat` Namespace.
  +
  +.. Create an Operator Group object:
  ++
  +----
  +$ oc create -f <file-name>.yaml
  +----
  ++
  +For example:
  ++
  +----
  +$ oc create -f eo-og.yaml
  +----
  +
  +.. Create a Subscription object YAML file (for example, `clo-sub.yaml`) to
  +subscribe a Namespace to the Cluster Logging Operator.
   +
   ----
   apiVersion: operators.coreos.com/v1alpha1
  
positive.code: ----
  
  .. Create a Subscription object YAML file (for example, `eo-sub.yaml`) to
  subscribe a Namespace to an Operator.
  +
  .Example Subscription
  [source,yaml]
  
negative.code: ----
  +
  The Elasticsearch Operator is installed to the `openshift-operators-redhat` Namespace and copied to each project in the cluster.
  
  .. Verify the Operator installation:
  +
  