Daniel E. Flage 
Berkeley’s Doctrine of Notions [PDF ebook] 
A Reconstruction Based on his Theory of Meaning

This book, first published in 1987, offers a reconstruction of Berkeley’s doctrine on notions by examining the implications of his repeated suggestion that there is a close relationship between his doctrine and his semantic theory. The study ties in with some of the most important topics in modern analytic philosophy, and casts important light on modern philosophical concerns as well as on Berkeley’s thought.