Hi Sivaganesh,
Are you talking about design guideline? https://experience.sap.com/fiori-design/
or Do and Don't style tipis? Best Build own freestyle SAP Fiori Apps for Fiori Launchpad - 10 Golden Rules
If you are looking for something else, please give an example.
SAP Web IDE - Create Applications
Regards,
Masa / SAP Technology RIG