Six years ago, as an employee of the Federal government, as part of
 my official duties, I wrote several editors that use a double linked
 list.  The new scheme in TDE 2.2 uses a double linked list.  Some of the
 concepts and/or code and/or techniques that I used to develop those
 editors as part of my official duties are incorporated into TDE 2.2.
 Being that my current official duties as an employee of the Federal
 government requires that I maintain and support those editors, as a
 matter of law and ethics, version 2.2 of TDE is released into the public
 domain.  It's not so much that I want to release TDE into the public
 domain, but more so, it's the law that requires that I release TDE into
 the public domain.  Not only is TDE 2.2 based on DTE 5.1, the public
 domain editor by Doug Thomson, but it is also based on works of the
 United States government, written and currently maintained by my
 ownself, Frank.  Copyrighting off-the-job what I do on-the-job would not
 be ethical.