Page "Look and feel" Paragraph 12

An API, which is an interface to software which provides some sort of functionality, can also have a certain look and feel.

Different parts of an API ( e. g. different classes or packages ) are often linked by common syntactic and semantic conventions ( e. g. by the same asynchronous execution model, or by the same way object attributes are accessed ).

These elements are rendered either explicitly ( i. e. are part of the syntax of the API ), or implicitly ( i. e. are part of the semantic of the API ).