http://www.ksvali.com/2010/02/bloomberg-open-symbology-bsym-
bloomberg-open-sources-its-security-identifier-universe/ describes
what you get: the right to use any Bloomberg symbol without license fees
and without having to ask permission. Personally, I would have call this
an 'open interface', not 'open source'. But 'open source' is hipper.
Bloomberg is a master of communication and they chose 'open source.'
They didn't do something radical like releasing their proprietary code
under the GPL.
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