Nodes in a flow operate on a document, which can be displayed with the following command:
show document
This produces a large output if the document is large. The following command can be used to skip a prefix and only display a certain length.
show document -offset 10000 -maxlen 2000
If the payload is an XML document, it is preferable to evaluate an expression to extract the desired information as follows.
eval _XPATH(/INVOICE/INVOICE-NUMBER)
One method to change the payload of a document is to use the Save command to save it to a file, then edit the file and reload the payload before resuming operation, as shown below.
save document doc.xml ... edit doc.xml ... set document -file doc.xml