anchor.diff:  
   This block can be quite long, so the example below shows only a few interesting excerpts.
   
  +**Note**: The `mysql` and `registry` attributes provide an example of a _YAML reference_, where:
  +
  +* A string prefixed with an ampersand defines the attribute to its left as a hash.
  +* Strings prefixed by an asterisk reference the hash defined previously.
  +
  +In this case, `&bosh_db` defines the all the keys and values in the `mysql` attribute as `bosh_db`.
  +Later, the `db` key in the `registry` attribute references the `bosh_db` hash.
  +The result is that the value of the `db` key in `registry` is the entire set of keys and values in `mysql`.
  +
   <pre class="terminal">
   properties:
   
  
positive.code: 
  	...
  
  	registry:
  	  address: 10.10.0.7
  	  db: *bosh_db
  	  http:
  
negative.code: 
  </pre>
  
  This block is IaaS-dependent.
  
  ## <a id="example"></a> A Basic Example Manifest ##
  