Thanks. Yes, that tells me how it is calculated and is very interesting.
The only thing is, if I actually wanted to check an ISBN I'd have to do
math that is usually beyond the capability of my brain. LOL I'm interested
in computers not because I am good at math--I'm not--but because they can
allow me to get out of actually calculating anything myself. :-)
It seems to me that whenever I read a theory of why certain people like
certain subjects and things they are always wrong about why I like those
subjects and things. :-) Oh well, I'm used to being weird.
Sarah Van Oosterwijck Assistive Technology Trainer http://home.earthlink.net/~netentity
Hey Sarah,
Before you go interpretting code, just try googling, here's a direct link to a site that gives guidelines. Of course I can't vouch for its 'validity' but lots of other results popped up as well.
http://www.cs.queensu.ca/home/bradbury/checkdigit/isbncheck.htm
Best,
Jake
----- Original Message ----- From: "Sarah Van Oosterwijck" <curiousentity@xxxxxxxxxxxxx>
To: <bksvol-discuss@xxxxxxxxxxxxx>
Sent: Wednesday, October 12, 2005 10:24 PM
Subject: [bksvol-discuss] Re: ISBN Numbers
If I remember correctly the last digit of the ISBN, which is always one digit by itself proceeded by a dash, is actually a kind of checksum for the rest of the ISBN. X is a 10. Unfortunately I don't know how to make the calculation necessary to make sure an ISBN is valid. I might be able to get ahold of that information, though. There might be a visual basic program on a computer around here that has some code for checking ISBN validity, and if it can be found I can look at what it does.
Sarah Van Oosterwijck Assistive Technology Trainer http://home.earthlink.net/~netentity
----- Original Message ----- From: "Mike Pietruk" <pietruk@xxxxxxxxx>
To: <bksvol-discuss@xxxxxxxxxxxxx>
Sent: Wednesday, October 12, 2005 3:53 PM
Subject: [bksvol-discuss] ISBN Numbers
This afternoon, I was doing preliminary validation work on a step 1 book
and discovered something interesting which might prove of value.
In one of my searches, I ended up at
www.thecheapestbook.com
where one can enter an isbn number to verify its validity or search for the book.
Well, I got back an invalid number, not a surprise, but the explanation
was somewhat enlightening. A correct isbn number must contain, according
to this, either 10
digits
or 9 digits plus an "x".
Perhaps this might explain why some attempts to supply an ISBN when
submitting a book falls flat presumably due to the number failing to scan
properly.
Mike
To unsubscribe from this list send a blank Email to
bksvol-discuss-request@xxxxxxxxxxxxx
put the word 'unsubscribe' by itself in the subject line. To get a list of available commands, put the word 'help' by itself in the subject line.
--
No virus found in this incoming message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.14/130 - Release Date: 10/12/2005
To unsubscribe from this list send a blank Email to
bksvol-discuss-request@xxxxxxxxxxxxx
put the word 'unsubscribe' by itself in the subject line. To get a list of available commands, put the word 'help' by itself in the subject line.
--
No virus found in this incoming message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.14/130 - Release Date: 10/12/2005
To unsubscribe from this list send a blank Email to
bksvol-discuss-request@xxxxxxxxxxxxx
put the word 'unsubscribe' by itself in the subject line. To get a list of available commands, put the word 'help' by itself in the subject line.
--
No virus found in this incoming message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.14/131 - Release Date: 10/12/2005
To unsubscribe from this list send a blank Email to bksvol-discuss-request@xxxxxxxxxxxxx put the word 'unsubscribe' by itself in the subject line. To get a list of available commands, put the word 'help' by itself in the subject line.
