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The @Valid annotation ensures the validation of the whole object. Importantly, it performs the validation of the whole object graph. However, this creates issues for scenarios needing only partial validation. On the other hand, we can use @Validated for group validation, including the above partial validation.

The @Required annotation applies to bean property setter methods and it indicates that the affected bean property must be populated in XML configuration file at configuration time. Otherwise, the container throws a BeanInitializationException exception. Following is an example to show the use of @Required annotation.

Labels can be used to select objects and to find collections of objects that satisfy certain conditions. In contrast, annotations are not used to identify and select objects. The metadata in an annotation can be small or large, structured or unstructured, and can include characters not permitted by labels.

Text Labeling vs Text Annotation Text annotation helps to visualize the important texts or words through computer vision while text labeling, the texts are highlighted and metadata is also added in the each word that are important to integrate into the language processing.

Similar to a label, an annotation is defined as a key-value map. Annotations are useful, for example, for providing metadata about a function, such as the function's author. Prerequisites. The OpenShift Serverless Operator and Knative Serving are installed on the cluster.

Users may add an annotation by clicking the Add Annotation link (pf-blue-400, #0088CE). This will add another row of input fields for a new annotation. New input fields will have help text that indicate to the user whether they should input a key or value in the field.

Kubernetes annotations are the second way of attaching metadata to the Kubernetes resources. They are pairs of key and value strings that are similar to labels, but which store arbitrary non-identifying data. For instance, you can keep the contact details of the responsible people in the deployment annotations.