anchor.diff:  ---------------------------------------
   // CONSOLE
   <1> Create an index called `my_index`.
  -<2> Specify fields or _properties_.
  -<3> Specify the data `type` and mapping for each field.
  -
  +<2> Specify the fields or _properties_ in the mapping.
  +<3> Specify that the `title` field contains `text` values.
  +<4> Specify that the `name` field contains `text` values.
  +<5> Specify that the `age` field contains `integer` values.
  +<6> Specify that the `created` field contains `date` values in two possible formats.
   
   --
   
  
positive.code: [float]
  == Example mapping
  
  A mapping could be specified when creating an index, as follows:
  
  [source,js]
  ---------------------------------------
  
negative.code:   "mappings": {
      "properties": { <2>
        "title":    { "type": "text"  }, <3>
        "name":     { "type": "text"  }, <4>
        "age":      { "type": "integer" },  <5>
        "created":  {
          "type":   "date", <6>
          "format": "strict_date_optional_time||epoch_millis"
        }
      }
  