| Package | Description | 
|---|---|
| com.amazonaws.services.dynamodbv2.xspec | A request-centric Expression Specification Builder package that can be used to construct valid
 expressions, and the respective name maps and value maps, for various DynamoDB requests in a typeful manner. | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | BA path operand that refers to a binary attribute in DynamoDB; used for building expressions. | 
| class  | BOOLA path operand that refers to a boolean attribute in DynamoDB; used for building expressions. | 
| class  | BSA path operand that refers to a binary set attribute in DynamoDB; used for building expressions. | 
| class  | LA path operand that refers to a list attribute in DynamoDB; used for building expressions. | 
| class  | MA path operand that refers to a map attribute in DynamoDB; used for building expressions. | 
| class  | NA path operand that refers to a number attribute in DynamoDB; used for building expressions. | 
| class  | NSA path operand that refers to a number set attribute in DynamoDB; used for building expressions. | 
| class  | NULLA path operand that refers to a NULL attribute in DynamoDB; used for building expressions. | 
| class  | SA path operand that refers to a string attribute in DynamoDB; used for building expressions. | 
| class  | SSA path operand that refers to a string set attribute in DynamoDB; used for building expressions. | 
| Modifier and Type | Method and Description | 
|---|---|
| static PathOperand | ExpressionSpecBuilder. attribute(String path)Returns a path operand that refers to an attribute of some unspecified
 data type; used for building expressions. | 
| Modifier and Type | Method and Description | 
|---|---|
| static <T> FunctionCondition | ExpressionSpecBuilder. attribute_exists(PathOperand pathOperand)Returns a function condition (that evaluates to true if the attribute of the
 specified path operand exists) for building condition expression. | 
| static FunctionCondition | ExpressionSpecBuilder. attribute_not_exists(PathOperand pathOperand)Returns a function condition (that evaluates to true if the attribute of the
 specified path operand does not exist) for building condition expression. | 
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