path	value/explanation	url	count
invalid code (1 variant(s))			1
008/18-21 (008book18)	'_' in '||_|'		1
invalid value (2 variant(s))			2
008/31 (008book31)	_		1
008/30 (008book30)	_		1
undefined subfield (1 variant(s))			1
022	l		1