An XML nodeset specifying any extra fields that should be sent to the file upload webroutine. This can be used to provide context data for the file being uploaded.
document('')/*/lxml:data/lxml:json[not(@id)] (this indicates no items have been defined for this weblet).
Not Applicable. (This value is system maintained.) To invoke the designer use the ellipse button in the property sheet.
This example shows the submitExtraFields property editor:

This shows how output fields in the current webroutine (the "Value" column) can be mapped to input fields with a different name (the "Name" column) defined in the onClick webroutine's WEB_MAP.