"This note proposes the use of a graph-oriented schema-description mechanism and the use of a persistent triple-store for such schema descriptions and selected metadata as a key storage mechanism within DSpace, along with a PostgresSQL O/R store. Needs: information transparency and longevity; active management of many schemas, over a period of time; accept information and begin creating instance metadata before schemas are fully understood. That is, need to enable and be resilient to evolving schemas; external and ad-hoc assertion capabilities; periodically re-factor schemas." |