Classifications in Open Library

In January's datadump I found these classifications, of which some are clearly wrong or spam. But to know that for sure, I needed a place to store the results. A large list of worldwide classification schemes can be found at the Library of Congress: http://www.loc.gov/standards/sourcelist/classification.html

Key	Name	Description	Link	January 2012 total count	January 2012 record count
lc_classifications	Library of Congress Classification		Wikipedia	11235056	10775901
dewey_decimal_class	Dewey Decimal Classification		Wikipedia	5811087	5421898
nur	Nederlandstalige Uniforme Rubrieksindeling	Dutch Uniform Classification	boek.nl/nur	153	150
lccn_permalink	Library of Congress Call Number permalink	should be listed under identifiers as number instead of URL		81	78
depósito_legal_n.a.	Depósito Legal N.A.	Spanish national repository, should probably be listed under identifiers		52	52
udc	Universal Decimal Classification		Wikipedia	32	27
identificativo_sbn	Identificativo Servizio Bibliotecario Nazionale	Italy's national library/repository? Should probably be listed under identifiers	SBN's OPAC	29	20
finnish_public_libraries_classification_system	Yleisten kirjastojen luokitusjärjestelmä	Finnish public libraries classification system	Homepage	24	22
rvk	Regensburger Verbundklassifikation	German classification system	rvk.uni-regensburg.de	13	10
library_and_archives_canada_cataloguing_in_publication				7	7
goethe_university_library,_frankfurt				5	4
lccn_permalink:_http:/lccn.loc.gov/65023044		Error, LCCN is not a classification. I removed the property from both records.		2	2
siso	SISO: schema voor de indeling van de systematische catalogus in openbare bibliotheken	scheme for the classification of the systematic catalogue in public libraries. Used in The Netherlands		2	2
entertaining_tvshows_online		Spam, report filed with Open Library		1	1
national_library_of_canada_catologue		identifier?		1	1
nlm_class_no.:	National Library of Medicine classification		Wikipedia	1	1
ulrls_classmark				1	1