[Developers] Get Freebase id from Wikipedia link

[Christopher R. Maden]

I wrote:
> You need to encode any non-ASCII characters as $hhhh where hhhh is the Unicode number for that character.  Then turn spaces into underscores.

I should be more careful: any non-alphanumeric characters.  Only a-z, A-Z, and 0-9 are allowed unescaped.  Underscores and dollar signs are acceptable as divider and escape, respectively.  (A literal dollar sign would need to be $0024.)

~Chris
-- 
Christopher R. Maden
Data Architect
Metaweb Technologies, Inc.
<URL: http://www.metaweb.com/ >