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in a soap header entry, if no actor attr, but has mustUnderstand attr, that means the

 
david wangwang
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header can be ignored?
thanks.
 
david wangwang
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I mean the mustUnderstand = "1", and can the header entry be ignored by the apps in the meassge path?
 
Jim Janssens
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When the actor attribute is omited, the header is meant for the final receiver.
The mustUnderstand attribute must only be interpreted IF the system plays the indicated role.

So, specfiying no actor and a mustUnderstand = 1 means that the final receiver must understand the header block.

Specfiying actor = next and
mustUnderstand = 1 means that the next receiver in the chain must understand the header block (which might also be the final receiver)

Specifying actor = 'logger' and mustUnderstand = 1 means that only the receiver playing the role of 'logger' must process the header block.

For the last case, when there was no receiver playing the 'logger' it is my believe that the haeder will reach the final receiver and the header is discarded (unless the final receiver plays the role of logger)
 
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