Each pattern is a three part rule, which expresses a relation between a certain context, a problem and a solution.
Each pattern describes a problem which occurs over and over again in our environment and then describes the core of the solution to that problem, in such a way that you can use the solution a million times over.
It is a brave architect who, in today's environment,
does not develop, or at least consider,
an object-oriented design.
..., ignoring details, plugin architectures indicate what may become the dominant paradigm of the future,
framework-like environments that are extensible by components following a clearly defined pattern or protocol.
that is to say, components created according to the Principles of Object-Oriented Software D evelopment.