The purpose of this section is to outline the principles involved in the Oracle ATG Web Commerce Search architecture and enable you to make the best decision for your sites. The examples that follow deal solely with search components; everything else is represented as the “Client Application.” For diagrams that show Search integrated with other Oracle ATG Web Commerce products, see the Oracle ATG Web Commerce Search Installation Roadmaps. In the diagrams that follow, the light gray boxes represent Oracle ATG Web Commerce servers, which can be, but are not necessarily, analogous to hardware resources. Dark gray boxes, when present, represent standalone search engines.