The existing Overview text focuses on the project goals and background.  Clarify in the introduction how this guide is implemented.  

For example:

This guide is a FHIR Resources (FHIR) Library to support the needs of multiple Vital Records Implementation Guides. It does not provide any use case or scenario specific content or additional guidance on how to use these artifacts, but serves as a source for a standard set of profile for reuse in multiple use case specific implementation guides focusing on the exchange of Vital Records information. Implementation details such as how and when to a given artifact will be supplied in these guides.