  A significant barrier to the portability of queries across di- verse physical
implementations of large data stores, espe- cially NoSQL data stores, is that
the queries reference the physical storage attributes, such as the table and
column names. In this paper, we describe a technique for embed- ding
ontological expressions called Address Expressions, or A-Expressions, in NoSQL
queries to improve their portability across diverse physical implementations.
We discuss an implementation of such queries over a MongoDB data store of the
Enron email corpus with examples, and conduct a preliminary performance
assessment.
