(This article contains the author's thought and is not structured as a research paper. Hence, the following is a paragraph taken from the article but not its actual abstract; the article does not have one.)

So you can see the essence of design patterns: good, tested recipes that don't constrain your implementation in unnecessary ways. The patterns do not mandate a particular style, nor include superfluous decorations: the book doesn't tell you, “make this shape of flourishes in the handrails”; instead it tells you, “a house should have its rooms placed such that sunlight enters them according to the time of the day in which they are most used - East for the bedrooms in the morning, West for the living room in the afternoon”.

Yann-Gaël Guéhéneuc, 2014/05/16