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# Cluster Configuration Parameters

IDOL Server can automatically cluster information to make trends and developments in this information visible. Clustering is the process of taking a large repository of unstructured data and automatically partitioning it to group similar information together. Each cluster represents a concept area in the knowledge base, and contains a set of items with common properties.

The `[Cluster]` configuration section contains parameters that allow you to configure clustering according to the quantity and nature of the data that you have stored in IDOL Server.

For example:

    [Cluster]
    ResultExpiryDays=30
    SnapshotExpiryDays=30
    SGExpiryDays=30
    DownloadDocAction=drecontents
    TitleFromSummary=True
    SummaryField=autn:summary

BindLevel

Equivalence

MinClusterDocs

NumClusters

PictureFormat

PictureQuality

ResultExpiryDays

SeedBindLevel

SeedSize

SGExpiryDays

SnapshotExpiryDays

StartingSuggestOverrideFactor

SummaryField

TitleFromSummary

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