AWS SDK for .NET Documentation
KeySchema Property
AmazonAmazon.DynamoDBv2.ModelGlobalSecondaryIndexDescriptionKeySchema Did this page help you?   Yes   No    Tell us about it...
The complete key schema for the global secondary index, consisting of one or more pairs of attribute names and key types (HASH or RANGE).

Constraints:

Length
1 - 2

Declaration Syntax
C#
public List<KeySchemaElement> KeySchema { get; set; }

Assembly: AWSSDK (Module: AWSSDK) Version: 1.5.60.0 (1.5.60.0)