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In prework script following objects are available:
$Xml
Xml data navigator for data model
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$Instance
Current workflow instance.
$Initiator
Initiator of workflow instance.
Common operations
Auto Process Task
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In prework script following objects are available:
$Xml
Xml data navigator for data model
...
$Instance
Current workflow instance.
$Initiator
Initiator of workflow instance.
...