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Publication data, or UserData, can be appended to a Publish command message after the NameValueString. The format of the data is defined in the Encoding, CodedCharSetId and Format fields of the MQRFH header. Alternatively, publication data can be included within the NameValueString, by means of user defined name/value pairs (which must not begin with the characters 'MQ'), or the system provided StringData and IntegerData tags. More details are given in Publish.
Figure 16 shows how publication data can be appended to the RFH structure. Note how the encoding, CCSID and format of the publication data are defined in the RFH structure. In Figure 17 the publication data is included within the NameValueString, and in Figure 18, the format of the publication data is defined by the user.
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