NoSQL is a time period characterized by a set of ideas, not a category. The data stores that came out of NoSQL were about using more specialized tools and rejec

NoSQL is a time period characterized by a set of ideas, not a category. The data stores that came out of NoSQL were about using more specialized tools and rejecting the dogma that all data persistence should be built on an RDBMS. Besides it's ability to be embedded, BerkeleyDB doesn't really provide any advantages over an RDBMS, other than raw simplicity. It's unlikely anyone looking at data persistence solutions would consider BDB alongside an RDBMS; they solve different problems. I think BDB is a useful and well-designed tool, but it's not NoSQL.