This manual contains documentation for libraries which are still part of the ECLiPSe distribution, but whose use is deprecated. Typically, the libraries have been replaced by newer implementation which provide similar or extended functionality. The old documentation is provided here mainly to ease the task of porting existing code to the newer libraries. Documentation for the new libraries can be found in the Constraint Library Manual and the Reference Manual. Here is a short overview of the obsolete libraries and where to find replacement functionality: