"The foregoing and other embodiments can each optionally include one or more of the following features, alone or in combination. The one or more section headings are presented in an order according to a book score of the corresponding n-gram summary terms. Each search result includes a snippet of text from the book resource that includes one or more terms of the corresponding query. Each search result includes a link to an image of a scanned page of the printed book in which the snippet of text occurs. A section score for an n-gram occurring in a section is a term frequency-inverse document frequency score for occurrences of the n-gram in the section. The book score for each n-gram is based at least in part on a sum of each section score for the n-gram. The book score for each n-gram is based at least in part on a rank of the n-gram in each section according to the section score. The book score is based at least in part on an inverse of a sum of inverse section scores for each n-gram in each section. The book score is defined by:
"book_score = K 1 i = 1 N 1 score i , ##EQU00003##
"for each section score i in each of N sections, and wherein K is a constant. The book score for an n-gram is defined by:
"book_score = Cm + Rv m + v , ##EQU00004##
"wherein C is an average book score of the n-gram, m is an average number of sections in which the n-gram occurs, R is an average of the computed section scores for the n-gram, and v is a number of sections in which the n-gram occurs.
"Particular embodiments of the subject matter described in this specification can be implemented so as to realize one or more of the following advantages. Organizing search results presentations by book sections provides users with an overview of corresponding internal structure within a book. Presenting a list of n-gram summary terms ranked by importance in the book provides users with a quick view of key issues and topics within the book. The list of n-gram summary terms can also aid users in discovering content in a particular book. N-gram summary terms can also be an aid in searching within a particular book.
"The details of one or more embodiments of the subject matter described in this specification are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages of the subject matter will become apparent from the description, the drawings, and the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
"FIG. 1 is an illustration of an example books search results page.
"FIG. 2 is an illustration of an example system.
"FIG. 3 is a flow chart of an example process for identifying a list of n-gram summary terms from the text of a book.
"FIG. 4 is another illustration of an example presentation of books search results.
"Like reference numbers and designations in the various drawings indicate like elements."
URL and more information on this patent application, see: Haugen, Frances B.; Gray,
Keywords for this news article include: Patents.
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