On 11/7/07, Randolph Neall <randy.neall at veriquant.com> wrote:
> Can I assume that what Thomas here advocates, ("relational databases can be
> used very effectively as a low-level store of blobs keyed by path") is what
> how the ocean persistence layer actually works? Beyond this, Thomas
> apparently has little use for the capacities of Sql-type RDBMS systems to
> handle clinical information. Does the Ocean system ultimately amount to
> blobs keyed by paths (presumably string paths)? If so, what kind of blobs,
> XML blobs, or some other structured text system?A guess from someone outside Ocean: If Tom has been involved I'd guess it's stored as blobs of DADL or something similar ;-) not XML... In a master thesis project here some time ago the students used db4o (http://www.db4o.com/) to store openEHR RM objects, but in a rudimetary way mostly as a simple datastore for Java objects. Query was not the focus of that project so they did not test proper advanced querying or scalability using db4o. // Erik
