# Index Properties
<a name="index-properties"></a>

Index properties define the behavior and characteristics of indexes in Amazon DocumentDB. Understanding these properties helps you design efficient indexes that meet your application's specific requirements.

## Topics
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+ [Index Property: name](index-property-name.md)
+ [Index Property: unique](index-property-unique.md)
+ [Index Property: sparse](index-property-sparse.md)
+ [Index Property: partialFilterExpression](index-property-partialfilterexpression.md)
+ [Index Property: expireAfterSeconds](index-property-expireafterseconds.md)