If you've manually added placeholders to your table or imported them from an Excel file, and are encountering duplicates after extracting data from a document, note that these are not exact duplicates. This is because O&D’s extractor filters out exact duplicates automatically. But note that it looks for exact matches. So, if there’s any difference in letter casing or spacing between what’s in your table and the document, it won’t be considered a duplicate, and the extractor will suggest it. You can either accept and add these to your table, remove individual suggestions, or exit. If any duplicates get added, you can easily delete them from the column context menu.
For clarity:
O&D’s placeholder replacement is not case-sensitive by default (though this can be adjusted in Editing Options), and some whitespace differences don’t impact matching. You may not need to add those suggestions to your table, but there is no harm in doing so. As O&D processes instructions left to right, by the time it reaches them, the placeholders will already be replaced with the data in the columns that came before them.
However, running the extractor is still a best practice. Sometimes what seems like a duplicate could actually be a typo in either the table or the document. The extractor ensures you catch all placeholders as they appear in the final document.