I have two tables in sql server 2005 that are intended to have a one-to-one relationship.

I have tried configure this relationship in the following ways:
1.) Both tables having identical PK values and a link between PK's
2.) PK on one table, linked to FK with Unique constraint on second table.

Neither of these configurations produce Nhibernate mappings that specify "one-to-one" relationships.

Does anyone know how I configure my tables to produce the "one-to-one" generated mapping I am seeking?

Perhaps a better question would be, does anyone know of an NHibernate map generation template that supports "one-to-one" relationships?