12.20.             事件分类

12.20.1.      报表事件

INITIALIZATION.

START-OF-SELECTION.

END-OF-SELECTION.

12.20.2.      选择屏幕事件

在INITIALIZATION和START-OF-SELECTION之间触发，对应于对话屏幕的 PBO、PAI、POH、POV事件

AT SELECTION-SCREEN { OUTPUT }

                    | { ON {para|selcrit} }

                    | { ON END OF selcrit }

                    | { ON BLOCK block }

                    | { ON RADIOBUTTON GROUP radi }

                    | {

 ON {

HELP-REQUEST|VALUE-REQUEST}

                                             { FOR {para|selcrit-low|selcrit-high} }

                    | { ON EXIT-COMMAND }

                        | { }.

12.20.3.      逻辑数据库事件

GET node [LATE] [FIELDS f1 f2 ...].

12.20.4.      列表事件

TOP-OF-PAGE.

END-OF-PAGE.

AT LINE-SELECTION.

AT USER-COMMAND.

AT pf<nn>.

12.20.5.      事件流图