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 (2 variant(s))			2
911	#		1
911	a		1
repetition of non-repeatable subfield (2 variant(s))			2
710$*	there are multiple instances		1
710$a	there are multiple instances		1