Something in the document that can be identified by ID. All operations have IDs and operations result into JSON nodes and chunks, which also have IDs.
Unique ID within a document.
Optional
Sometimes an Identifiable can be a compound entity, which holds multiple entries with sequentially growing timestamps. In this case span represents the number of entries.
span
Something in the document that can be identified by ID. All operations have IDs and operations result into JSON nodes and chunks, which also have IDs.