Is the CollabNet TeamForge SOAP API backwards-compatible?

The SourceForge Enterprise Edition 4.x and CollabNet SourceForge Enterprise 5.x APIs (including Service Pack updates) are fully compatible with CollabNet TeamForge . Applications developed using these earlier APIs will continue to function after you upgrade to CollabNet TeamForge .

A release of CollabNet TeamForge may be accompanied by updates to the API. These changes are always backwards compatible with earlier versions of the API. However, the calls from the different API versions are not interchangeable.