1. A system for analyzing requirements data, comprising: a requirements database storing partially-structured data related to a subject matter domain; a semantic network linking partially-structured data in the requirements database to related data; and an analytic tool, comprising: a user interface configured to receive a query from a user; and an analyzer configured to: parse the query into search terms; identify related terms in the semantic network; identify a requirement in the requirements database that contains at least one related term; and provide the requirement to the user.