Hi Oliver,

> I am not sure with the three license models of Firebird.

Not as bad as that: it's two :-)

> First citation: "New code modules added to Firebird are licensed
> under the Initial Developer's Public License. (IDPL). The original
> modules released by Inprise are licensed under the InterBase Public
> License v.1.0. Both licences are modified versions of the Mozilla
> Public License v.1.1."

> What I understood so far is, that we can use Firebird for our office
> to develop our product in this way of "commercial use".
> But we sell a 3-tier-architecture j2ee software product, which needs
> a rdbms as backend. We would glad to offer the customer to install
> at their company the complete appserver (jboss) and rdbms
> (firebird), that they can use it for no pricing. Is this allowed
> with the underlying licenses?

Absolutely. You can distribute and install Firebird everywhere for
free. No limitations, no prior permission needed, no strings attached.

Only if you change the source code of Firebird itself, or if you use
Firebird source code in your own software, you must carefully read the
licenses and comply with the requirements. (In a nutshell: this too is
permitted, but then you must open-source any and all of your modules
that contain IPL/IDPL licensed code or modifications thereof.)


Greetings,
Paul Vinkenoog