How will map service offering and configuration item

[PriyankaK850940]

Need to create mapping for service offering with configuration item so that when a service offering is selected to raise an incident, the associated CI are visible in the CI field

[jstoessel]

I would suggest starting from here:  https://www.servicenow.com/community/itsm-articles/how-to-configure-incident-management-to-align-wit...

which is an article that speaks directly to how to create the types of configurations needed to support CSDM in ITSM.

[Mary Vanatta1]

 You would use Dynamic CI Groups to group like CI classes.  See Now Create content (must be logged in) 

CSDM - Getting Started 

CSDM Data Model Examples