path	value/explanation	url	count
invalid code (1 variant(s))			1
008/18-21 (008book18)	'_' in '||_|'		1
invalid value (4 variant(s))			4
008/31 (008book31)	_		1
008/30 (008book30)	_		1
Leader/08 (leader08)	0		1
246$ind1	" "		1
non-empty indicator (1 variant(s))			1
911$ind1	0		1
undefined subfield (3 variant(s))			3
856	b		1
911	#		1
911	a		1