A framework for domain-specific search engine: design pattern perspective

Domain specific research engine has many advantages over its generic counterparts such as high precision and short update period. However it is a time consuming job to construct these applications. We introduce an object-oriented framework for domain specific search engine applications, which contain some design patterns that contribute to this object-oriented architecture, revealing the framework´s structure and the forces that shaped it. Using this framework we fix a basic architecture and thus increase ability to construct domain specific search engine application.