anchor.diff:  ** `replica`
   ** `freedisk`
   * `#ALL` : This is applied to the `replica` attribute only. This means all replicas qualifying a certain clause
  -* `#EQUAL`:  This is applied to the `replica` attribute only. This means equal no:of replicas in each bucket
  +* `#EQUAL`:  This is applied to the `replica` attribute only. This means equal no:of replicas in each bucket.The buckets can be defined using an array operator (`[]`) or `#EACH` .The buckets can be defined on the following properties
  +** `node`
  +** `sysprop.*`
  +** `port`
  +** `diskType`
  +** `ip_*`
  +****
  +Some content here
  +****
  +
  +
   
   === Examples of Policy Rules
   
  
positive.code: 
  For the above rule to work, all nodes must the started with a system property called `"zone"`
  
  
  ==== Place Replicas Based on Node Role
  Do not place any replica on a node which has the overseer role. Note that the role is added by the `addRole` collection API. It is *not* automatically the node which is currently the overseer.
  
negative.code: * `!`: Not
  * Range operator `(-)` : a value such as `"3-5"` means a value between 3 to 5 (inclusive). This is only supported in the following attributes
  ** `replica`
  ** array operator . e.g: `sysprop.zone = ["east", "west","apac"]`. This is equivalent to having multiple rules with each of these values. This can be used in the following attributes
  ** `sysprop.*`
  ** `port`
  ** `ip_*`
  ** `node`
  ** `diskType`
  * None means equal
  
  ==== Special functions
  