HSDL for contract extension/update

Summary:

Hi Team,

Do anybody built HSDL template for Contract extension or update and successfully able to load the data? Can you please share you HSDL template.

I am trying to build a new one using attributes from Assignment & Contract with in the Worker object but keep on getting error

You must provide a valid reference to the parent record. Ensure that the parent record is supplied in the same file, or has already been created. You can reference the parent record using one of the four supported key types. The View Business Objects task lists the attributes that you can use to identify the parent record for this component.