anchor.diff:  Key or Index lookup
   ^^^^^^^^^^^^^^^^^^^
   
  -.If you are using django 1.7, you can use index or key lookup for filtering
  +.If you are using Django 1.7, you can use index or key lookup for filtering
   [source, pycon]
   ----
   >>> Something.object.bulk_create([
  
positive.code: Deprecation policy
  ~~~~~~~~~~~~~~~~~~
  
  At any momment of time, django-pgjson developers will mantain support for two versions of django.
  
negative.code: ----
  
  
  NOTE: At this moment, with PostgreSQL 9.3 as last stable version there is only a
  limited set of native operators for json type. When PostgreSQL 9.4 is released,
  more lookups will be added.
  
  jsonb containment lookup
  ^^^^^^^^^^^^^^^^^^^^^^^^
  
  If you are using Django 1.7 and PostgreSQL >= 9.4, you can use the special jsonb
  containment operator, which can be accelerated by a GiN index on the jsonb
  field.
  
  