1. A method comprising: a computer processor determining a first key concept of a particular document; in response to receiving a search query from a user, the computer processor generating search results that include a search result listing for said particular document; the computer processor generating said search result listing for said particular document by creating a summary of said particular document that is less than all of said particular document; wherein generating said summary comprises the computer processor selecting, from said particular document, and including, in said summary, one or more excerpts that each contain both (a) said first key concept and (b) one or more non-key concept words that are within a specified proximity of an occurrence of said first key concept in said particular document; sending, toward an application, a search results page that comprises (a) one or more search result listings for one or more of the search results and (b) one or more key concepts for each of one or more of the search result listings; after sending said search results page toward said application, receiving, from said application, a request that specifies (a) a particular search result listing of said one or more search result listings sent toward said application and (b) a second key concept of said one or more key concepts sent toward said application; and in response to receiving the request, sending, toward the application, a particular summary for the particular search result listing, wherein the particular summary is generated based on the second key concept without regard to the query terms and without regard to the first key concept.
1. A method comprising: a computer processor determining a first key concept of a particular document; in response to receiving a search query from a user, the computer processor generating search results that include a search result listing for said particular document; the computer processor generating said search result listing for said particular document by creating a summary of said particular document that is less than all of said particular document; wherein generating said summary comprises the computer processor selecting, from said particular document, and including, in said summary, one or more excerpts that each contain both (a) said first key concept and (b) one or more non-key concept words that are within a specified proximity of an occurrence of said first key concept in said particular document; sending, toward an application, a search results page that comprises (a) one or more search result listings for one or more of the search results and (b) one or more key concepts for each of one or more of the search result listings; after sending said search results page toward said application, receiving, from said application, a request that specifies (a) a particular search result listing of said one or more search result listings sent toward said application and (b) a second key concept of said one or more key concepts sent toward said application; and in response to receiving the request, sending, toward the application, a particular summary for the particular search result listing, wherein the particular summary is generated based on the second key concept without regard to the query terms and without regard to the first key concept. 8. The method of claim 1 , wherein determining the first key concept comprises automatically extracting one or more key concepts from the particular document.