When I peruse this site and others, I find references to apparent operations that change either one surface structure to another (as with passivization) or a deep structure to a surface structure (as with raising).
Is the notion of transformations still current among generative linguists?
If not, how do generative grammarians generally explain the linguistic data formerly explained by transformations?
If so, where can I find a list of transformations currently acknowledged by generative grammarians?
Also if so, has the number of acknowledged transformations decreased over time?