|  AutoPost | If true, the database is updated immediately when the field value changes. | 
|  Field | The value of the specified field. | 
|  FromReq | The requirement from which the association is defined. | 
|  ID | The item ID. | 
|  IsLocked | Checks if object is locked for editing. | 
|  Modified | Checks if the item has been modified since last refresh or post operation. If true, the field properties on the server side are not up to date. | 
|  ToReq | The requirement to which the association is defined. | 
|  TracedReq | The other requirement that the initiating requirement forms a trace with. | 
|  Virtual | Checks if this is a virtual item, that is, an item that does not have a corresponding database record. |