|  01-30-2012, 05:53 PM | #1 | 
| Guru            Posts: 776 Karma: 2751519 Join Date: Jul 2010 Location: UK Device: PW2, Nexus7 | 
				
				Adding more DC metadata elements to ePubs
			 
			
			I want to add some more dc: metadata elements to epubs that do not appear to be available in the edit metadata dialogue, such as dc:subject and dc:contributor with various roles. I can use Tweak ePub to edit these directly into the opf file within the ePub, but should I also add them to the metadata.opf file which exists in the calibre library folder for the book?
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|  01-30-2012, 06:03 PM | #2 | 
| hopeless n00b            Posts: 5,126 Karma: 19597086 Join Date: Jan 2009 Location: in the middle of nowhere Device: PW4, PW3, Libra H2O, iPad 10.5, iPad 11, iPad 12.9 | 
			
			dc:subject is already implemented as Tags (each comma separated value is a different subject).
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|  01-30-2012, 06:09 PM | #3 | 
| Guru            Posts: 776 Karma: 2751519 Join Date: Jul 2010 Location: UK Device: PW2, Nexus7 | |
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|  01-30-2012, 10:52 PM | #4 | 
| creator of calibre            Posts: 45,604 Karma: 28548974 Join Date: Oct 2006 Location: Mumbai, India Device: Various | 
			
			Adding them to the opf is meaningless,as calibre will simply ignore them. You should create a custom column and add them there as well as to the epub's opf.
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