[Web4lib] Conversion between ISBN-10 and ISBN-13

[Casey Bisson]

http://api.wpopac.net/v1/isbn1013/0811822842

Same usage as xISBN and thingISBN. Returns empty result with invalid  
ISBNs.

Based on Blyberg's code, incorporates some changes, may not be  
accurate. Poke at it, break it. Report findings, but don't blame me  
if it returns incorrect results (I will try to fix the code/service,  
though).

--Casey

On Oct 2, 2006, at 11:54 AM, Tim Spalding wrote:

> Someone should offer single and batch converstion as a free API, not
> an online form and an offer to have a "representive" call you for
> larger jobs.
>
> Does anyone want that, or shall I?