Promoting a property in a custom component AFTER debatching

Hi,

I have a scenario where I would like to debatch an XML message and promote a computer property on each debatched message.

For that, I was thinking to create a custom pipeline which would use the built-in XML disassembler component to debatch the message.

As the promoted property I want to create is a computation on some elements in each individual debatched message, I was thinking to create a custom pipeline component which  would read from the individual message and do the property promotion.

The problem is that as the MSDN documentation state, only 1 disassembler run in the receive pipeline (it works on a first match basis). Maybe I can promote the property in the Validation stage? But I am not "validating" the document...

Any idea what would be the best practice for this type of scenario?

Thanks,

Francois