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isbn provides utilities for handling international standard book numbers. The isbn egg consists of two modules: isbn for validating isbns and isbndb for querying the database at http://isbndb.com. For this you need to provide an api key which is free of charge:
In line with the long term vision of the ISBNdb.com project the access to the data from individuals should be free of charge. In reality, this is extended to even broader range of application -- as long as the application does not send an excessive amount of requests and meets our pretty liberal terms and conditions -- most uses are OK, individual, research or commercial. source
Starting with version 0.3 of this egg, the open and free api of http://openlibrary.org is also supported. Advantages over isbndb are: No need for an API key, more detailed results plus links to cover images.
All modules can be loaded optionally. Note that the openlibrary needs normalized ISBNs to work with.
(require-extension isbn) (require-extension isbndb) (require-extension openlibrary)
normalize-isbn[procedure] (normalize-isbn STRING)
Reduces the ISBN string to the allowed "compressed" format without spaces or dashes as separators.
valid-isbn?[procedure] (valid-isbn? STRING)
Checks ISBN-10 and ISBN-13 numbers by normalizing them and running the checksums agains the numbers.
isbn10->isbn13[procedure] (isbn10->isbn13 STRING)
Converts a ISBN-10 number to the EAN compatible ISBN-13 format. Returns a dash separated string or #f on error. This function has been added with version 0.2 of this egg.
isbn-type[procedure] (isbn-type STRING)
Returns 10 for ISBN-10 and 13 for ISBN-13 numbers or #f if no valid number has been given. This function has been added with version 0.2 of this egg.
#;1> (normalize-isbn "978-3854523871") "9783854523871" #;2> (valid-isbn? "978-3854523871") #t
Parameters: The API key & DB base URL[parameter] (api-key STRING)
The isbndb web api requires you to register on the site to aquire a database key. Registration is instant and can be done here.[parameter] (database-url STRING)
URL of the base API URL, in case this should ever change. Default: http://isbndb.com.
isbn->alist[procedure] (isbn->alist STRING)
Queries the isdndb for an entry belonging to the ISBN string. No ISBN validation is done at this stage. Returns an alist containing title, authors, subtitle, publisher. Returns an empty list if no entry could be found.
#;1> (isbn->alist "978-0262011532") (((title . "Structure and interpretation of computer programs") (authors ("Harold Abelson and Gerald Jay Sussman, with Julie Sussman; foreword by Alan J. Perlis")) (publisher "Cambridge, Mass. : MIT Press ; c1996.")))
Parameters: Database URL[parameter] (database-url STRING)
URL of the base API for openlibrary.org. Default: http://openlibrary.org/
Descripes the available keys this module supports.
(define-constant user-keys '(title authors publisher publishing-date number-of-pages cover-urls isbn-numbers)) ;exported is this (define available-keys user-keys)
isbn->alist[procedure] (isbn->alist STRING #!optional (interesting-entries))
Queries openlibrary.org for an ISBN. It seems that you need to give it a normalized ISBN to make it work. interesting-entries is an optional parameter that can be a subset of the user-keys list. Defaults to user-keys: title, authors, publisher, publishing-date, number-of-pages, cover-urls, isbn-numbers
#;1> (use openlibrary) #;2> (pp (isbn->alist "0937073806")) ((title . "Literate programming") (authors ("Donald Knuth")) (publisher ("Center for the Study of Language and Information")) (publishing-date . "1992") (number-of-pages . 368) (cover-urls ("small" . "http://covers.openlibrary.org/b/id/715228-S.jpg") ("large" . "http://covers.openlibrary.org/b/id/715228-L.jpg") ("medium" . "http://covers.openlibrary.org/b/id/715228-M.jpg")) (isbn-numbers (("0937073806" "0937073814")))) #;3> (pp (isbn->alist "0937073806" '(title authors publishing-date))) ((title . "Literate programming") (authors ("Donald Knuth")) (publishing-date . "1992"))
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