Open implementation
Appearance
Open implementation is a term used to describe computing systems where the implementation is accessible to users. Open implementation allows users of a program to alter pieces of a program in order to fit their specific needs. With this technique it is far easier to write general tools, though it makes the programs themselves more complex to design and use.
There are also open language implementations, which make aspects of the language implementation accessible to application programmers.
Open implementation is not to be confused with open source, which allows users to change source code, rather than making changes at the application level.