| Face properties | 
Emotions, mouth attributes, head pose, etc. | 
| Basic attributes | 
Age, gender, and ethnicity. | 
| Samples, Warps, Normalized images | 
Images containing a face and corresponding to certain standards. | 
| Face | 
Faces are changeable objects that include information about a single face. | 
| Descriptor | 
A descriptor is a set of unique features received from the sample. A descriptor requires much less storage memory in comparison with the sample and is used for comparison of faces. | 
| Matching | 
The operation of matching descriptors stored in the database. | 
| Occlusion | 
State of an object (eye, mouth) when it is hidden by any other object. | 
| Landmarks | 
Characteristic points on a face corresponding to the position of a certain object of a face. They are determined by the LUNA PLATFORM. | 
| Message Queue | 
A Message Queue is a service that receives messages and stores them in the appropriate queue until another service receives them. | 
| Routing key | 
Routing key is the name for the queue in the message queue service. | 
| Bucket | 
A logical entity used to store objects. |