This recent post on Dynamo Nodes shows how a simple Navisworks Search Set can be built by Dynamo running inside of Revit:
Create Navisworks Search Set XML for Element Ids | Dynamo Nodes
Create Navisworks Search Set XML for Element Ids | Dynamo Nodes
In the first release, this node just uses Element Ids to build a long ‘or‘ search set, but this basic idea could easily be extended and adapted to more closely connect Revit to Navisworks search workflows through Dynamo.
Here is a Screencast:
