A framework is usually just a library for language L. Often it's extensive and serves a single broadly-defined purpose. A programming language implementation f

A framework is usually just a library for language L. Often it's extensive and serves a single broadly-defined purpose. A programming language implementation for a language P, written in language L, usually denotes a function in L which maps strings representing programs in P to effects (interpreters) or to programs in yet another language (compilers).