path	value/explanation	url	count
invalid value (5 variant(s))			5
773$ind1	" "		1
710$ind1	" "		1
264$ind2	" "		1
245$ind1	" "		1
245$ind2	" "		1
undefined subfield (1 variant(s))			1
856	i		1
invalid ISBN (1 variant(s))			1
020$a	ISBN is not a valid ISBN 13 value		1