| OID | OID (database unique ID) - numeric datatype  A single column containing a database-unique identifier. It is this identifier which is actually used  to link all the records in all the tables to the same Occurrence. | 
                                            
                                                | OCCKEY | Occurrence key | 
                                            
                                                | USER_ID | User id | 
                                            
                                                | EDFDATE | Eccairs system date (European Development Fund) | 
                                            
                                                | DOINDEX | Eccairs system index | 
                                            
                                                | EDFLOCK | Eccairs system lock (European Development Fund) | 
                                            
                                                | LASTDBOP | Last database operation | 
                                            
                                                | EDF | Binary index of images - not in use. | 
                                            
                                                | A452 | The occurrence file number | 
                                            
                                                | A453 | The identification of the type of entity that is responsible for the occurrence record. | 
                                            
                                                | A453_1 | Last part of A453 | 
                                            
                                                | A453_2 | Full part of A453 | 
                                            
                                                | A453_3 | Unknown value/field | 
                                            
                                                | OCCTAXNAME | Taxonomy name of the occurrence | 
                                            
                                                | OCCTAXVER | Taxonomy version of the occurrence | 
                                            
                                                | IDXTAXNAME | Taxonomy name of the occurrence | 
                                            
                                                | IDXTAXVER | Taxonomy name of the taxonomy version | 
                                            
                                                | IDXCUSTNAME | Custom Taxonomy id of the occurrence | 
                                            
                                                | IDXCUSTVER | Custom Taxonomy version of the occurrence | 
                                            
                                                | A453_1_Translate | Translation of the code-value in A453_1 column. | 
                                            
                                                | A453_2_Translate | Translation of the code-value in A453_2 column. | 
                                            
                                                | A453_Translate | Translation of the code-value in A453 column. | 
                                            
                                                | A453_3_Translate | Translation of the code-value in A453_3 column. |