Hi i have a requirement where i have to find out strings,files,names,data etc.(may be in database,files or whatever)
Anyone knows how search enginees work basically for finding any name they check for all possibility.
Eg: If i search for java it will give informatio of java books,sites-url,all links,full information about java etc.
so how exactly they do all this.
I just need an extarct from whole of this.
The concept they follow or do they append some string values or add after or whatever they do.


Actually in my application i have a requirement where strings,files has to be searched(along with all possibilties).We are placing information in our database,files etc.
SO when i say search for "name";it sholud start searching "name" in all tables,databse,files along with all other nearer possibilities of "name"+"ing" or "ed" or anything else just like yahoo,goole or any other search engine does all this.

I need to know mechanism follwed by them.
I don't want all complexities but i sholud be able to make good search in my aplication.Security wise i am not much bothered as only in my application if you are searching anything file,word or whatever you should get the information and its related links thats my requiremnt.

I have got a link where i tried to get something:
but its free version is giving some error.
Anyone can test this also.

http://www.dbsight.net/?q=node/47

Please provide me information links whatever is possible.
Any idea highly appreciated.

Thanks
Vijendra