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					Originally Posted by Pepin33  ˇYes! ˇThat was the answer! Works perfectly with: 
	Code: program:format_number(template('[[identifiers:select(my_id)]]'), '{0:g}') Thank you very much, chaley (and also theducks). | 
	
 The following template will have better performance, something that might matter if you have thousands of books in your library.
	Code:
	program:format_number(select(field('identifiers'), 'my_id'), '{0:d}')