I'm building a business directory in InDesign, and my data source is a MySQL database. I can query this database anyway I wish, and output it either as xml or as a csv file.
I prefer the XML option, as it gives me the ability to use a more complex hierarchy of subdirectories, and is easier to work with, compared to Data Merge of a csv file.
The one thing missing, though, is the ability to generate QR Codes from the XML data, as can be done with data merge (using hashtag as prefix for the field name).
I've spent quite a lot of time Googling it, but couldn't find anything that has to do with XML data and generating QR Codes in InDesign. Does that mean it can't be done?