### E.2.3 Notes for developers

There has been an entensive process of refactoring, redesign and modularization of Singular to facilitate easier maintenance and future development:

- Build System : automake, libfac has been integrated into Factory
- Removed MP (Multi protocol) in favor of SSI links.
- Separation/modularization into libraries and packages
- For easy integration of new coeffcient rings, we defined a generic interface for coefficient rings and a supporting framework for making them accessible to the user.

  In particular we have separated everything related to coeffcient rings into a separate library `libcoeffs`. Dependency tree between restructured packages is show at http://www.mathematik.uni-kl.de/~motsak/dox/singular.png

User manual for Singular version 4-0-2, 2015, generated by texi2html.