What should be used to overlay data when multiple documents share the same Overlay Identifier?

When dealing with multiple documents that share the same Overlay Identifier, it is essential to use a unique ID for overlaying the data. A unique ID ensures that each document can be distinctly identified and processed, allowing for accurate data retrieval and manipulation without confusion between different documents. This precision is crucial in environments that manage large sets of documents to prevent data mismatches or errors.

In this context, the use of a unique ID means that even if documents share the same Overlay Identifier, they can still be differentiated based on their unique identifiers. This practice enhances data integrity and reliability in operations that involve aggregating or analyzing document data.

Using a shared ID or a common identifier may imply that multiple documents could incorrectly link to the same identifier, leading to potential data inconsistencies. A duplicate ID would also result in ambiguity and confusion over which document is being referenced, which can hinder effective data management. Thus, relying on a unique ID is the most effective approach when overlaying data across documents with a shared Overlay Identifier.