License

db4objects Inc. supplies the object database engine db4o under a dual licensing regime:

General Public License (GPL)

db4o is free to be used:

You should have received a copy of the GPL in the file db4o.license.txt together with the db4o distribution.

If you have questions about when a commercial license is required, please read our GPL Interpretation policy for further detail, available at:

http://www.db4o.com/about/company/legalpolicies/gplinterpretation.aspx

Commercial License

For incorporation into own commercial products and for use together with redistributed software that is not placed under the GPL, db4o is also available under a commercial license.

Visit the purchasing area on the db4o website or contact db4o sales for licensing terms and pricing.

Bundled 3rd Party Licenses

In .NET versions

The db4o distribution comes with the following 3rd party libraries:

  • http://mono-project.com/Cecil Mono.Cecil (MIT/X11)

    Used inside Db4objects.Db4o.Tools.dll

    Cecil is used to read the CIL code during native queries optimization.

  • http://mono-project.com/Cecil Cecil.FlowAnalysis (MIT/X11)

    Used inside Db4objects.Db4o.Tools.dll

    Cecil.FlowAnalysis is used to analyse the CIL code during native queries optimization.

  • http://mono-project.com/ Mono.GetOptions (MIT/X11)

    Used inside Db4oAdmin.exe

    Mono.GetOptions is used to parse the command line of the Db4oAdmin.exe tool.