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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » CWF MRM Nulls

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TonyG
PostPosted: Thu May 27, 2004 8:59 am    Post subject: CWF MRM Nulls Reply with quote

Newbie

Joined: 16 Jul 2002
Posts: 4
Location: UK
I have defined an MRM (using WBIMB v5) to transform a fixed format input to XML output.

This works fine, however I would like to use the MRM to remove NULL fields from the message and not render them as XML. I cant see how to do this in the MRM (without resorting to ESQL in a tidy-up compute node).

e.g. If a CWF character field is completety padded with spaces I do not want an XML tag generated when I change from MRM to XML domain.

Is there a way of setting the MRM up to achieve this?
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kimbert
PostPosted: Fri May 28, 2004 12:51 am    Post subject: Reply with quote

Jedi Council

Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
Using the Null Handling options in your CWF physical format, you could instruct the CWF parser to create nodes with NULL values for these fields.
However, I think you will still require some ESQL to remove the NULL fields from the tree - MRM null handling is designed for nodes which exist, but have an explicit value of NULL. If the node exists, the MRM XML writer will always output it.
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shanson
PostPosted: Tue Jun 01, 2004 5:11 am    Post subject: Reply with quote

Partisan

Joined: 17 Oct 2003
Posts: 344
Location: IBM Hursley
Instead of not outputing a null field, you could consider using XML Schema Instance's mechanism for flagging a field as null - the xsi:nil attribute. This is supported by the V5 broker.
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