Full Idea
V = L just says all sets are constructible. L is the class of all constructible sets, and V is the universe of all sets.
Gist of Idea
V = L just says all sets are constructible
Source
Hilary Putnam (Models and Reality [1977], p.425)
Book Reference
'Philosophy of Mathematics: readings (2nd)', ed/tr. Benacerraf/Putnam [CUP 1983], p.425