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Document ml datafeed Id limitations (#37653)

David Kyle 6 years ago
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0ae7f8630c
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  1. 2 0
      docs/reference/ml/apis/put-datafeed.asciidoc

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docs/reference/ml/apis/put-datafeed.asciidoc

@@ -24,6 +24,8 @@ You must create a job before you create a {dfeed}.  You can associate only one
 
 `feed_id` (required)::
   (string) A numerical character string that uniquely identifies the {dfeed}.
+  This identifier can contain lowercase alphanumeric characters (a-z and 0-9),
+  hyphens, and underscores. It must start and end with alphanumeric characters.
 
 
 ==== Request Body