Use PBCore 2.0′s extension elements to embed metadata from external schema’s within your PBCore record. In this example, PREMIS fields are embedded within PBCore:
<instantiationExtension>
<extensionEmbedded>
<object xmlns="http://www.loc.gov/standards/premis/v1">
<!-- section removed for clarity -->
<creatingApplication>
<creatingApplicationName>Final Cut Pro</creatingApplicationName>
<creatingApplicationVersion>7</creatingApplicationVersion>
<dateCreatedByApplication>2011-01-24</dateCreatedByApplication>
</creatingApplication>
</object>
</extensionEmbedded>
</instantiationExtension>

Why would you want to embed PREMIS metadata in PBCore? Wouldn’t it make better sense structurally to do it the other way around?