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mxGraph is licensed under the Apache License 2.0.
The servers require Java 6.0 or later or .NET 3.5 or later. Using PHP 5.0 is informally supported. The I/O module for PHP requires libxml. The PHP examples do not support image export.
For information on new releases, please see the mxGraph Changelog.
There is also a very low volume mailing list that only emails in the event of a critical issue affecting mxGraph.