path	value/explanation	url	count
invalid value (2 variant(s))			4
Leader/05 (leader05)	" "		2
264$ind2	" "		2
undefined subfield (3 variant(s))			6
886	h		2
886	x		2
886	z		2
repetition of non-repeatable subfield (1 variant(s))			2
886$a	there are multiple instances		2