# Explicitly include or exclude attributes
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The DynamoDB Enhanced Client API offers annotations to exclude data class attributes from becoming attributes on a table. With the API, you can also use an attribute name that's different from the data class attribute name.

## Exclude attributes
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To ignore attributes that should not be mapped to a DynamoDB table, mark the attribute with the `@DynamoDbIgnore` annotation.

```
private String internalKey;

@DynamoDbIgnore
public String getInternalKey() { return this.internalKey; }
public void setInternalKey(String internalKey) { this.internalKey = internalKey;}
```

## Include attributes
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To change the name of an attribute used in the DynamoDB table, mark it with the `@DynamoDbAttribute` annotation and supply a different name.

```
private String internalKey;

@DynamoDbAttribute("renamedInternalKey")
public String getInternalKey() { return this.internalKey; }
public void setInternalKey(String internalKey) { this.internalKey = internalKey;}
```