Yield data structure represent an output or product of data processing.
Inbound synchronization _yields_ data values, as do mappings and users entering data in user interface.
Each such result will be described by a value of this data structure.
Multiple values of this metadata structure indicate several independent sources for the data value that it describes.
Ultimate origin of the data.
This metadata structure represents the way how the data (or their components) entered the system.
As data are processed by midPoint mechanisms (such as mappings), the acquisition metadata are preserved during the processing.
Multiple values of acquisition data indicate that data from several sources were combined to create the result.