unique categories of identifiers found in open library cover identifier mapping file

ol-cover-identifiers.txt

1sbn
alecso
alexandriava.gov
alibris_id
almedina
amazon
amazon_asin#
amazon.ca_asin
amazon.co.uk_asin
amazon.de
amazon.de_asin
amazon.it
archive.org
asin
asin:
barcode
barnes_&_noble
barnes_and_noble_-_bn.com
bayerische_staatsbibliothek
bca
bcid
bhl
bibliotheca_alexandrina
bibliothèque_nationale_de_france
biodiversity_heritage_library
bodleian,_oxford_university
booklocker.com
bookmooch
books_on_demand
booksonclick
british_library
british_national_bibliography
canadian_national_library_archive
choosebooks
cihm_number
cornell_university_library
create_space
depósito_legal
depósito_legal_bolivia
dewey_decimal_classification
dewey_decimal_classification_(ddc)
dewey_number
dnb
dnb_(german_national_library)
doi
dominican_institute_for_oriental_studies_library
download-tvshows
e-books
ean
eat_professional_poker_players_alive!_official_site
ebook_family_friendly_store
edition
el_número_de_inscripción_de_la_obra
epub_isbn
exclusive_north_american_distributor
fennica
flipkart
format
format:_kindle_edition
freebase
gallica_(bnf)
goodreads
google
google_books
gpn_(taiwan)
hakikat_kitabevi
harvard
harvard_university_library
hathi_trust
hizmetbooks.org
id
idealbooks
ilmiolibro
isbn
isbn_(pb:-_paper_back)
isbn_hb
isbn13
ISBN13
isfdb
issn
judaica_savings
kindle.com
l.n.
lc_classification
lccn
lccn_permalink:
library_of_congress_catalog_card_no.
library_of_congress_catalog_card_number
library_of_congress_catalog_no.
library_of_congress_catalogue_number
library_of_congress_classification_(lcc)
librarything
libris
limited_edition_book_number
lulu
lulu_id
magcloud
media_mint_publishing
national_book_chamber_of_moldova
national_diet_library,_japan
national_library_archives_of_canada
national_library_of_australia
national_library_of_egypt
newberry_library_cartographic_catalog
niedersächsische_staats-_und_universitätsbibliothek_göttingen
nla
numéro_de_dépôt_légal
número_de_incripción_de_la_obra
ocaid
oclc
olid
overdrive
paperback_swap
pdf_version
project_gutenberg
publishamerica
publisher
publisher_catalog
registro_autoral
sadguru_sanga_diary
scribd
shelfari
smashwords_book_download
smashwords.com
sold_by
special_library_collections
ssrn_id
sudoc
system_number_of_the_research_library_olomouc
taideteollisen_korkeakoulun_julkaisusarja
tate_publishing.com
ulrls
universal_decimal_classification
universitätsbibliothek_heidelberg
university_library_of_the_ludwig-maximilian_university_of_munich
upc
victoria_institutions
w._w._norton
web_link/_internet_url