Prompt page - Clear values API

[SAM_COGNOS]

hi

We have a prompt page and a report page. Once a user selects the values in the prompt page and clicks finish , report gets generated. as per business request, we provided a block with prompts on the report page as well. User requested that the prompt values be cleared out after clicking reset icon. The code for reset icon is designed using the clear value API. we have mandatory prompts, but the clear value API just clears the prompt values but doesn't indicate which prompts are mandatory after clicking the rest icon (clear value API). Any suggestions please.