What Is an Excerpt?

An excerpt is made of one or more text segments from an indexed record. The segments mainly encompass events of the searched terms. The purpose of the excerpt is to provide essential pieces of the document, and also therefore, help you determine if the document includes the information you are trying to find. In the excerpt, the searched terms are highlighted.

Tip: In .NET search interfaces featuring the Precommendations connect, you have the right to configure the excerpt to incorporate one to four lines of message (watch Modifying .NET Search Interface Preferences).




You are watching: What is the purpose of this excerpt?

Example: When you search for flash SSD, the two-line other than for the following search results contains highlights the searched terms.

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Note: No excerpt shows up in the search result for a copy defended document (such as a PDF) to proccasion reflecting its content in a context wright here users can make a copy. When the excerpt is absent or empty for specific documents, your muzic-ivan.info administrator can verify if the documents are identified as copy defended in the index (view Reviewing Document Details from the Index Browser).


Example: In Adobe Acrobat, in the Password Security Setups dialog box, when you clear the Enable copying of text, imperiods, and various other content examine box, the record becomes copy defended, and no excerpt appears in search outcomes for this record.

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Why Keywords Do Not Appear in Some Excerpts?

By default, muzic-ivan.info search interencounters just return search outcomes containing all searched keywords, so you have the right to legitimately intend search results excerpts to incorporate your search keywords. However before, in some cases choose the ones noted below, one or even more of your keywords might not show up in the search result excerpts.

Your query consists of many type of keywords

When a query includes many type of keywords (such as a long sentence), however the keyword occurrences are scattered in the document, it may be difficult to assemble a few segments (within 200 characters) that include all the keywords.


How Are Excepts Generated?

At indexing time, the cleaned message of each item"s content is videotaped in the index. At query time, relevant segments that include the keywords are extracted from the tape-recorded cleaned text to build the excerpt.


Note: The compressed cleaned message recorded for each item is restricted in size (about 32 KB) to optimize the index dimension and query performances. For big records (such as PDF records via a number of hundred pages), just the content at the start of the record have the right to therefore show up in excerpts.


The algorithm used to geneprice the excerpts is very facility. The goal is to extract the most relevant segments approximately keywords and fit the cause 2 or 3 lines (generally 200 characters).

To assist you understand also exactly how the excerpt is assembled, here are indications of some of the criteria on which the algorithm is based:

Create a contextual segment roughly each highlighted keyword:

Ideally a complete sentence

Segment centered on highlighted keywords

Grow little sentences with content from surrounding sentences

Evaluate each segment ranking score based on:

Keyword proximity and completeness

Number of non soptimal words keywords within the segment

Grammatical quality

Segment position in the record (much better at beginning)

Typical word length

Sentence length

Keep the best segments:

Skip segments not bringing new keywords to maximize completeness

Merge overlapping segments

If not sufficient characters:

Grow best segments initially

Merge little nearby sentences


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