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Regular Expression Details

Title Test Find Pattern Title
Expression
^\d{9}[\d|X]$
Description
A very simple ISBN validation expression - it just checks for a 10 digit number where the last digit could also be a capital 'X'. Complete specs for ISBN available here: http://www.isbn.org/standards/home/isbn/international/html/usm4.htm. An enhancement would be to allow exactly 3 or 0 hyphens or 3 or 0 spaces, since these are also valid formats.
Matches
1234123412 | 123412341X
Non-Matches
not an isbn
Author Rating: Not yet rated. Steven Smith
Source
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Existing User Comments

Title: Not quite perfect ...
Name: Luke Arms
Date: 7/15/2004 2:52:36 AM
Comment:
I might be wrong here, but doesn't this pattern allow something like: 123456789| I think it needs to be: ^\d{9}[\dX]$ :)


Title: Should've mentioned...
Name: Darren Neimke
Date: 3/14/2004 7:02:51 AM
Comment:
I've got a more comprehensive ISBN pattern here: http://localhost/RegexLib/REDetails.aspx?regexp_id=487 The comments for that pattern also contains a link to some stuff which I blog'ged about ISBN's some time ago.


Title: Simple but nice
Name: Darren Neimke
Date: 3/14/2004 6:42:18 AM
Comment:
Like it Steve, this would certainly fall under the 80/20 rule.


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