Document search system for specialized technical documents

A computer readable medium having instructions that cause a data processing system to execute a search method when said instructions are loaded into a processor on said data processing system, said search method identifying documents in a library comprising a plurality of documents and a plurality of concepts exemplified by said plurality of documents, said search method comprising:

• providing a concept database that associates concepts in a particular field to which said plurality of documents relates;
• providing access to said library, each document in said library further comprising a concept index indicating concepts from said concept database that are included in that document;
• causing said data processing system to identify candidate documents matching a user provided search keyword from said library;
• causing said data processing system to generate a topical graph relating two or more of said plurality of concepts contained in said concept indices of said candidate documents to one another;
• clustering said candidate documents based on said topical graph;
• and
• for each cluster, displaying a summary of said candidate documents in that cluster together with a cluster name that characterizes that cluster.