Message Content of MarketDataRequestReject (MsgType=Y)
|TagText||FieldName or ComponentName||Required||Description|
|StandardHeader||x|| MsgType = Y
|262||MDReqID||x|| Must refer to the MDReqID of the request.
|354||EncodedTextLen|| Must be set if EncodedText field is specified and must immediately precede it.
|355||EncodedText|| Encoded (non-ASCII characters) representation of the Text field in the encoded format specified via the MessageEncoding field.
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Don't forget to refer to the FPL Discussion Groups to back up anything you write. You will often find the authoritative statements on matters of FIX specification interpretation there. Links from FIXwiki pages to relevant discussions on the FPL site are very valuable.
For example if you were writing a clarification on how to specify the "quantity" of an order in FIX, you might add the following relevant link, http://www.fixprotocol.org/discuss/read/f5014573, to back up your points.