path	value/explanation	url	count
invalid code (2 variant(s))			2
008/18-21 (008book18)	'u' in 'und|'		1
008/18-21 (008book18)	'n' in 'und|'		1
invalid value (1 variant(s))			1
008/23 (008book23)			1
undefined subfield (2 variant(s))			2
911	#		1
911	a		1