Hello Pavan,
As far as i know there is no impact even if you do not add slug header while doing Create Operation for the media resources. Your operation would be successful with out any error.
We use slug header where ever we are creating a new resource inside the system. We use it in order to provide/suggest a name for that resource.
For example -> Lets say i want to attach a supporting document for a document number 3500000255 for Company Code 1000 for a fiscal Year 2016 and for Business Area IN00 in SAP.
Then i would like to name that attachment as 350000025_1000_2016_IN00.docx and send as part of slug header and save it so that it would be saved with that name which is unique and easy to identify.
You can also use a header 'CustomParameter' and send values inside it.
But we use slug as its a standard header which is already provided by HTTP
Regards,
Ashwin
