Combining Information from Multiple Internet Sources
Combining Information from Multiple Internet Sources
Combining Information from Multiple Internet Sources
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there are set up search engines. Afterwards MA forwards the query to the each of the SA. Each SA is<br />
assigned a different search engine and MA controls engines assignment process.<br />
Having the search engines assigned, the SA can start querying the engines. After search is<br />
finished, the SAs return their result sets to the MA, which starts processing results according to the<br />
algorithm chosen by the user at the beginning. When answer processing is finished, the MA sends<br />
the final results to the web application which displays them on the webpage. There are two<br />
possibilities depending on algorithm outcome. If the algorithm was able to find the best result, the<br />
result list is displayed and knowledge base is updated instantaneously. The search engine which<br />
yielded the final result is ranked as the best and other engines are ranked according to how close<br />
they were to this engine. If, however, algorithm was not able to yield one answer; application<br />
presents a list of possibilities and displays an option to provide feedback - selection of the answer<br />
that is the most valuable (subjectively, of course). After the feedback is received application ranks<br />
the engines according to it. Engines ranks are stored in the knowledge base – for each query, search<br />
engine and method of answer processing, there are engine ranks. After MA calculates the weights<br />
those are sent to the SAs which update the knowledge base with ranks (weights) of the engine they<br />
were assigned at the beginning and application can be issued another query.<br />
In order to present to the user readable output, the vast majority of data is saved to local<br />
files. Only the top 10 results are displayed on the web page. The action of saving is done by<br />
Manager Agent. More precisely: information which is saved contains 10 top results <strong>from</strong> result sets<br />
of each search engine as well as the final result of answer processing algorithm.<br />
Below is the use case diagram which presents what are the operations of the agents. It also<br />
depicts interaction with the application, however without getting into the details of the Client<br />
module.<br />
Fig 2.2.2.1 Use case diagram of Main module<br />
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