Representation in prolog - logic programs, Computer Engineering

Representation in Prolog - Logic Programs:

If we justimpose some additional constraints on first-order logic, so than we get to a representation language knowing as logic programs. There is the main restriction we impose is that all the knowledge we want just to encode is represented as Horn clauses. Hence these are implications that comprise a body and a head is where the predicates in the body are conjoined so they imply the single predicate in the head. Still Horn clauses are universally quantified over whole the variables appearing in them. Then ,there an example Horn clause looks such as:

1736_Representation in Prolog.png

If we notice that the body consists of predicates bi and the head is h(x,y). So there we can make this look a lot much more like the Prolog programs you are needed to writing by making syntactic changes: now first, we turn the implication around and write it as :- like:

∀ x, y, z (h(x,y) :- b (x,y)1 b (x)2 ... b (x,y,z))n

Now finally, we remove the universal quantification it is assumed in Prolog that make the variables capital letters in Prolog requires this to put a full stop at the end:

∀ x, y, z (h(x,y) :- b (x,y), b (x), ..., b (x,y,z))1

Just simplified that we use the notation h/2 to indicate that predicate h has arity 2. In addition we need to call a set of Horn clauses like these a logic program. So for representing knowledge with logic programs is, less expressive than full first order logic,so it can still express lot more of types of information. Obviously in particular, disjunction can be achieved by having alternate or different Horn clauses with the same like head. then, this sentence in first-order logic:

∀x (a(x) b(x) ∨ c(x) d(x))

Posted Date: 1/10/2013 5:54:31 AM | Location : United States

Related Discussions:- Representation in prolog - logic programs, Assignment Help, Ask Question on Representation in prolog - logic programs, Get Answer, Expert's Help, Representation in prolog - logic programs Discussions

Write discussion on Representation in prolog - logic programs
Your posts are moderated
Related Questions
Solve the following 8-department problem using the MIP method.  What is the resulting layout and flow-distance score?  Note that the aspect ratio of each department should be 2.

can u please tell me the assembly language program for carry look ahead adder that can run in 8086 emulator?? its urgent

Q. Show Two Way Pipelined Timing? Figure below demonstrates a simple pipelining scheme in which F and E stages of two different instructions are performed concurrently. This sc

Explain routing tone in strowger telephony with waveforms and the timings. The call-in-progress tone or routing tone is a 400 Hz or 800 Hz intermittent pattern. In electromec

What is error checking? It computes the error correcting code (ECC) value for the data read from the given sector and compares it with the corresponding ECC value read from the

Question: (a) In order to encourage the development mobile technologies, Europe has opted for standardisation. What is the rationale behind this? Provide concrete examples of h

Differences between Datagrid, Datalist and Repeater?   1. Datagrid has paging while Datalist doesnt. 2. Datalist has a property known as repeat. Direction = vertical/horizon

Q. What is Command Prompt Interface? Operating System gives a text based interface called command prompt.  With the help of command prompt commands can be issued to perform fil

a. It improves quality by providing consistent advice and by making reduction in the error rate. b. Expert systems are reliable and they do not overlook relevant info