You probably got the first (1986) edition. The second (1994) edition is much better, but more expensive. (But, there's a $49 copy on amazon. That's a steal! I paid $80ish, argh...)
They added quite a bit of material to the latter chapters, and it updated to the newer, then de-facto standard Prolog (which became an ISO standard in 1995). Useful Prolog implementations usually have non-ISO extensions for module systems, constraint programming, etc.
I have both. I keep the first edition at the office, and it's my lending copy.
No worries. I got the 1986 edition for $5 and liked it so much I got the newer for $80. Learning Prolog changed the way I think as much as learning Lisp or C.
You probably got the first (1986) edition. The second (1994) edition is much better, but more expensive. (But, there's a $49 copy on amazon. That's a steal! I paid $80ish, argh...)
They added quite a bit of material to the latter chapters, and it updated to the newer, then de-facto standard Prolog (which became an ISO standard in 1995). Useful Prolog implementations usually have non-ISO extensions for module systems, constraint programming, etc.
I have both. I keep the first edition at the office, and it's my lending copy.
Uh...yes, you're right, this is the 1986 edition.
Oh, well. Saving $30 on a language I'm not likely to use is probably a Good Thing.
No worries. I got the 1986 edition for $5 and liked it so much I got the newer for $80. Learning Prolog changed the way I think as much as learning Lisp or C.