Hi,

You generated Ornatrix hair from mesh strip and now you want to convert it to xGen hair, correct? The only way I can think of doing this is converting the hairs to curves, then using those curves to generate xGen hair. Unless xGen can import Alembic curves as hairs. If that is the case you can export the Ornatrix hair as Ornatrix Alembic and then import it into xGen. 

Jeordanis Figuereo (Product Designer. EPHERE Inc.)