Quote:
Originally Posted by KevinH
Have you added the opf xmlns prefix as an attribute to the metadata tag?
To use the opf namespace prefix, it must be defined. Typically this is done in the metadata tag attribute. Once that is added, you should be able to use he opf: namespace prefix before the role attribute.
KevinH
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Thanks, Kevin. That did it. The old Sigil content opf only had a <metadata> tag and no attribute.