The Uniform Access Principle was put forth by Bertrand Meyer. It states "All services offered by a module should be available through a uniform notation, which does not betray whether they are implemented through storage or through computation." This principle applies generally to object-oriented programming languages. In simpler form, it states that there should be no difference between working with an attribute, precomputed property, or method/query.
While most examples focus on the "read" aspect of the principle, Meyer shows that the "write" implications of the principle are harder to deal with in his monthly column on the Eiffel programming language official website.
Read more about Uniform Access Principle: Explanation, UAP Example
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