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The <DocumentData> element indicates what content will be replicated when multiple records are printed using this layout. Even if you expect that the report will only be used on a single document at a time, you should still include the <DocumentData> element because each custom print layout that is available on a Proliance document is also available from the register. Without the <DocumentData> element, Proliance will not know what content to repeat in the report if the user chooses to print a batch of Proliance documents using this layout.
Apply the <DocumentData> element to an entire row of a table if you want a separate row generated for each Proliance document.