anchor.diff:  
   tag::preference[]
   `preference`::
  -  (Optional, string) Specifies the node or shard the operation should be 
  -  performed on. Random by default.
  +(Optional, string) Specifies the node or shard the operation should be 
  +performed on. Random by default.
   end::preference[]
   
   tag::search-q[]
  
positive.code: sequence number. See <<optimistic-concurrency-control-index>>.
  end::if_seq_no[]
  
  tag::include-defaults[]
  `include_defaults`::
  (Optional, string) If `true`, return all default settings in the response.
  Defaults to `false`.
  end::include-defaults[]
  
  tag::include-type-name[]
  `include_type_name`::
  deprecated:[7.0.0, Mapping types have been deprecated. See <<removal-of-types>>.]
  (Optional, boolean) If `true`, a mapping type is expected in the body of
  mappings. Defaults to `false`.
  end::include-type-name[]
  
  tag::index-ignore-unavailable[]
  `ignore_unavailable`::
  (Optional, boolean) If `true`, missing or closed indices are not included in the
  response. Defaults to `false`.
  end::index-ignore-unavailable[]
  
  tag::include-segment-file-sizes[]
  `include_segment_file_sizes`::
  
negative.code: Defaults to 100. 
  end::scroll_size[]
  
  tag::search_timeout[]
  `search_timeout`::
  (Optional, <<time-units, time units>> Explicit timeout for each search 
  