What characteristic defines the values of Dynamic Document Properties?

Dynamic Document Properties are characterized by their ability to be assigned on a document-by-document basis. This means that each document processed can have its own unique set of values stored in these properties, allowing for flexibility and customization in handling the data as it flows through the integration processes.

This is particularly useful in scenarios where different documents may need to carry different metadata or context, as each instance of a document can store and manipulate its properties independently. Utilizing dynamic properties like this ensures that the process can adapt to varying data sets without being constrained by uniform values that apply to every document.

The other characteristics presented in the options do not align with the nature of Dynamic Document Properties. For instance, persistence across all documents would imply a static nature, which contradicts the dynamic aspect, while modification after process completion and maintaining uniformity across executions also do not fit the definition of how these properties are designed to function in the Boomi platform.