"_doc" is correct, not "doc"
@@ -152,7 +152,7 @@ PUT my_index <1>
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// CONSOLE
<1> Create an index called `my_index`.
-<2> Add a mapping type called `doc`.
+<2> Add a mapping type called `_doc`.
<3> Specify fields or _properties_.
<4> Specify the data `type` and mapping for each field.
