Abstract: A system for link analysis, having records of plural record types, and having links of plural link types, the links linking pairs of the records. Some of the pairs may be of different record types. The system may also have an index indexing the records of plural record types. The record types may have respectively different sets of fields. The index may index one or more of the fields of each of the records. The records may correspond to real world entities or information, and the fields and their names may correspond to attributes of the entities. Metadata or the like may map the fields to the field names, and may be used to sensibly display related information, such set of the records, etc. All entities or records may be searched, which may be combined with link search and analysis. Point-to-point searches and repeated search refinement may also be provided.