public void setValue(String value) {
        this.value = value;
    }
<p>
An optional string, typically used to describe or define the tag. Valid characters include Unicode letters,
digits, white space, _, ., /, =, +, -, %, and @.
</p>

@param value
       An optional string, typically used to describe or define the tag. Valid characters include Unicode
       letters, digits, white space, _, ., /, =, +, -, %, and @.
aws-java-sdk-machinelearning/src/main/java/com/amazonaws/services/machinelearning/model/Tag.java