Oracle  APEX Process Execution Point说明
Point
Select at what point in page rendering or processing this process is executed.

Available options include:

New Session
在生成新会话时执行。
Executes when a new session is generated.
Before Header
渲染：在页面渲染之前执行。
Rendering: Executes before the page renders.
After Header
渲染：在页眉渲染之后执行。
Rendering: Executes after the header renders.
Before Regions
渲染：在区域渲染之前执行。
Rendering: Executes before the regions render.
After Regions
渲染：在区域渲染完成后执行。
Rendering: Executes after the regions render.
Before Footer
渲染：在页脚渲染之前执行。
Rendering: Executes before the footer renders.
After Footer
渲染：在页面渲染完成后执行。
Rendering: Executes after the page renders.
After Submit
处理：在页面提交后，但在计算、验证和页面处理执行之前执行。
Processing: Executes after the page is submitted, but before computations, validations, and page processes performed.
Processing
处理：在完成验证和计算后，即页面处理阶段执行。
Processing: Executes after validations and computations performed, when page processing performed.
Ajax Callback
当由 apex.server JavaScript API 调用时执行
Executes when called by apex.server JavaScipt APIs.

--刘轶鹤