DBColumnName | The database column name. | 
  DBColumnType | The database column type. | 
  DBTableName | The database table name. | 
  EditMask | The input mask for string fields. | 
  EditStyle | The user interface control type used to edit this field. | 
  FieldSize | The size of the field in the database (-1 for BLOB fields). | 
  IsActive | Checks if the field is can be displayed in the user interface. | 
  IsByCode | Checks if the field saves the Tree Node ID (True), or the passed value (False). | 
  IsCanFilter | Checks if the field is displayed in the filter dialog box. | 
  IsCanGroup | Checks if items of this type can form groups with others of the same type. | 
  IsCrossSubtype | Indicates if this is a cross subtype column. | 
  IsCustomizable | Checks if the field is displayed in the customization UI. | 
  IsEdit | Checks if the field can be edited. | 
  IsHistory | Checks if change history is stored for the field. | 
  IsKeepValue | Checks if the last value for the field is stored. | 
  IsKey | Checks if this is a database key field. | 
  IsMail | Checks if e-mail is sent to the users on the notification list when this field changes. | 
  IsModify | Checks if the user currently logged on the TDConnection is permitted to modify this field. | 
  IsMultiValue | Checks if the field can store multiple values. | 
  IsRequired | Checks if this is a required field. | 
  IsSearchable | Checks if the content of the field is searched by the Search method. | 
  IsSupportsHistory | Indicates if this field supports history. | 
  IsSupportsRequired | Indicates if this field supports required. | 
  IsSystem | Checks if this is a predefined system field. | 
  IsTemplate | Checks whether the field originated from the project template. | 
  IsToSum | Checks if this field is summed for graphs. | 
  IsTransient | Checks if the field is transient. | 
  IsVerify | Checks if the field requires verification. | 
  IsVersionControl | Checks if the field is under version control. | 
  IsVirtual | Checks if the field is virtual. | 
  IsVisibleInNewBug | Checks if the field is visible in the New Bug form. | 
  ReadOnly | Checks if this is a read-only field. | 
  ReferencedIdColumn | The name of the id column in the field's referenced table. | 
  ReferencedNameColumn | The name of the name column in the field's referenced table. | 
  ReferencedTable | The field's referenced table name. | 
  Root | The tree root connected to the field. | 
  UserColumnType | The user column type: char, number, date, memo, or empty string. | 
  UserLabel | The user-defined label. |