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Wednesday, April 29, 2009


Flex is a very powerful and versatile expert systems toolkit. In contrast to simple
expert system shells, Flex offers an open-ended knowledge-based solution to business
problems. Flex is implemented in Prolog, a high-level rules-based language, and has
unlimited access to the power of that underlying technology. Flex also has access to
whatever the Prolog has access to, and in the case of LPA Prolog for Windows, that
includes other applications and processes using various industry standards such as
DLLs, DDE, OLE, ODBC and much, much more.

Flex employs a ‘Natural Language’ style approach to defining knowledge through
the provision of a dedicated Knowledge Specification Language, KSL. As with many
quasi-NL systems, this can lull developers into a false sense of expectation where
rules which look as though they should compile and behave in a certain way, don’t.
Then starts the painful process of debugging and tracing. Two similar looking KSL
statements can map on to totally different underlying structures and behave very

Flex provides an interactive question and answer mechanism, which can be
configured and extended by the developer without limit. Again, the underlying Prolog
offers various high-level features for extending the User Interface.

Flex stores data within a frame hierarchy with multiple inheritance.

Flex provides a myriad of inferencing technologies, including both brittle and
fuzzy rules, and both forward and backward chaining. Forward and backward
chaining can be interleaved, so getting the best of both worlds. Flint provides the basis
for the uncertainty handling features, and supports Bayesian Updating, Certainty
factors and Fuzzy Logic.

A principal aim of this tutorial is to start you off on the right foot, and help you get
your syntax right first time, and help you start appreciate the potential of Flex.

Flex Tutorial

1.1 What is Flex?

1.1.1 What are Flex programs?

1.1.2 How does Flex relate to Prolog?

1.1.3 Constructs in Flex

1.1.4 How extendable is Flex?

1.1.5 Naming conventions in Flex

1.2 Basic Flex Constructs

1.2.1 KSL Sentences

1.2.2 Conditions and Directives

1.3 Installing and starting Flex

1.4 Important Tips

1.4.1 The Console window

1.4.2 Create a new file

1.4.3 The Run Menu

1.4.4 Analysing syntax errors

1.4.5 How are Flex programs compiled?

1.4.6 How are Flex programs executed?

1.4.7 Restarting Flex?

1.4.8 How do I stop Flex (or Prolog) running?

1.4.9 Use of semicolons

1.4.10 Use of full stop

1.4.11 Use of spaces

1.4.12 Use of quotes and apostrophes

1.4.13 Use of the $ character

1.4.14 Debugging in Flex

1.5 Useful Prolog routines

1.5.1 Prolog built-in predicates


2.1 First Program

2.2 Questions and answers

2.3 Compiling and running queries

2.4 Expanding the code

2.5 Expanding the code further


3.1 Frames and Instances

3.2 Attribute Values


4.1 Using the student information base

4.2 Scheme for changing a student’s status and checking both the old and the new value

4.3 A special frame called ‘global’

4.4 Some aids to formatting


5.1 Comments and punctuation

5.2 Numbers

5.3 Atoms

5.4 Byte Lists

5.5 Strings

5.6 Variables

5.7 Names

5.8 Values


6.1 Rules

6.2 Rule sets

6.3 Facts and exceptions

6.4 Groups (static)

6.5 Groups (dynamic)

6.5 Questions (dynamic)

6.6 Relations

6.7 Multiple Relations

6.8 Templates


7.1 Saving a changed database

7.2 Changing the database at run-time

7.3 Saving the modified database

7.4 Retrieving the modified database


8.1 Launches

8.2 Constraints

8.3 Demons

8.4 Watchdogs


9.1 Directives

9.1.1 Assignments Direct Assignments New instances

9.1.2 Database Maintenance

9.2 Conditions

9.2.1 Equality Comparison

9.2.2 Direct Comparison

9.2.3 Relative Comparison

9.2.4 Set Membership

9.2.5 Procedure Calls

9.3 Conjunctions and Disjunctions

9.4 Context Switching


10.1 Functions

10.2 Importing Records


11.1 Inherited Values

11.2 Identification algorithm



13.1 Listing code

13.2 Displaying values

13.3 Membership

13.4 Misc

Tuesday, April 28, 2009

Web tools

Search Engines
Backlink Checker
Find a list of backlinks linking to a specific website.
Cloaking Checker
Cloaking Checker
Google Banned Checker
Discover whether a website is banned on Google.
Google Datacenter Search
Search keywords/phrase through different Google data centres.
Google PageRank Prediction
Predict your future Google PageRank.
Index Checker
Check for the total number of pages of a specific website which are present on search engines.
Keyword Density Checker
Analyze a websites to view the optimum keyword distribution.
Keyword Suggestion
Find related keywords matching your search.
Link Popularity
Retrieve a number of backlinks of a specific website from search engines.
Multi-Rank Checker
View multiple Google PageRank and Alexa Ranking in bulk.
PageRank Checker
View Google PageRank on different Google servers.
Rank Checker
Get an overview of a website's ranking.
Search Engine Position
Check your search engine positions on Google Search Engine.
Search Listings Preview
Preview your website on Google, MSN and Yahoo! Search.
Spider View
This tool enables you to view a perpective from a search engine spider.
URL Redirect Checker
Check whether a redirect link is Search Engine Friendly.
Visual PageRank
View the PageRank of links visually rather than in text.

.htaccess URL Rewrite
Convert your dynamic URL into a short friendly link.
Anonymous Emailer
Send e-mails to users anonymously.
Google Adsense Calculator
Quickly calculate your Adsense earnings based on Page Impressions.
Google Adsense Preview
Preview what ads are targeted for your website.
Link Shortener
Make a long web address short and easy to remember.
List Cleaner
Clean and remove duplicates from a list.
md5 Encrypt
Use this simple online converter tool to encode any inputted text to md5.
Online Calculator
Use this free and easy online calculator to work out quick calculations.
Unix Time Converter
Convert UNIX internal time formats to a date or Vice versa.
Your Browser Details
Find out your IP address, hostname and your browser details

Domain Checkups
Alexa Traffic Rank
View and compare Alexa Ranking graphs.
Broken Link Checker
Use this tool to check for Broken Links on a website.
Domain Availability
Check for available domain names.
Domain Look-up
Retrieve a range of information about a domain.
Domain Whois
Retrieve a domain whois information.
Instant Domain Checker
Check the availability of domains instantly.
IP Location
Locate the country of an IP Address.
Link Price Calculator
Estimate how much to pay for a link.
Ping Test
Check the presence of an active connection.
Reciprocal Link Checker
Check your reciprocal links to see if link partners are still linking back to your site.
Reverse IP/Look-up
Searches for domain names hosted on your IP address.
Server Status
Check if a website is online or offline.
Website Speed Test
Find out how fast a specific webpage loads.

HTML Encrypt
Hide your HTML source code.
HTML Optimizer
Optimize and clean your HTML source code.
HTTP Headers
Extract the HTTP Headers of a web page.
Link Extractor
Extract links from a specific web page.
Meta-tags Extractor
Extract meta-tags information from a web page.
Meta-tags Generator
Generate and configure your meta-tags.
Source Code Viewer
View the source code of a page.

Friday, April 3, 2009

About Me

Inside Web Charegrs


* Bestsellers
* Children's Books
* Classic Literature
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* Contemporary Literature
* Manga
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* Fiction Writing
* Film / TV Careers
* Media Careers
* Music Careers

* Classic Movies
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* Hollywood Movies
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* Kids' Movies & TV
* World / Independent Film


* 80s Music
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* Children's Music
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* Classic Rock
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* Dance Music / Electronica
* Digital Music
* Folk Music
* Heavy Metal
* Jazz
* Latin Music

(Music Continued)

* Oldies Music
* Punk Music
* R & B / Soul
* Rap / Hip-Hop
* Rock Music
* Theater
* Top 40 / Pop
* World Music

Hacking Tutorials .
* Hacking Tools
* Hacking Articles

* Anti virus Softwares
* System Utilities
* Desktop Utilities


Wednesday, April 1, 2009

Swathi Weekly 1st May 2009 Edition Latest

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