How to create multiple entries using Odata

Hi OData  Netweaver gateway Experts,

I am new in UI5 Odata development service.

Can anybudy tell me please, the step by step procedure to create or update multiple entries in OData  Netweaver gateway.

I can able to create or update single in. I red somthing to pass $batch in service URI and need to redifine

/IWBEP/IF_MGW_CORE_SRV_RUNTIME~CHANGESET_BEGIN

/IWBEP/IF_MGW_CORE_SRV_RUNTIME~CHANGESET_END

but not getting end to end idea how to create or update multiple entries.

Thanks and Regards,

Samir Sute