| Class | A type of entity ( e.g. Player) |
| Entity | An instance of a class within the server |
| Send-Tables | A version agnostic description of entity structure |
| Symbol Index | A string within the send-tables |
| Serializer | A layout description of a class or set of fields |
| Field | A field within a serializer, describing its type and how to decode it |
| Field Decoder | A decoder for a given field |
| Property | A instance of a field within a entity, perhaps containing nested properties |
| Field Path | A path to a specific field within a tree of serializers, used to set or retrieve a value |
| Entity Update | A server packet to describe creation, deletion and updating entity properties |