1. Semantic Knowledge Store Tim Martin SPAWARSYSCEN, San Diego, CA
An Implementation of a
Semantic Knowledge Store
(SKS)
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Dr. David J. Roberts
Joseph Mango
John Bresnik
Tim Martin SPAWARSYSCEN, San Diego, CA
DIST A:  Approved for public release, distribution is unlimited (2 September 2004)
2004 Semantic Technologies for e-Government Conference
8-9 September 2004

2. One Definition of Efficiency…
This is the fire house that twice failed to save the town, once in 1892 and again in Both times the fire mains were clogged (no maintenance) and the frustrated townsfolk watched major portions of the town burn down. In a monument to government efficiency, both times the fire house was saved.
Bodie, California

3. Purpose of Research…
Provide an architectural framework for fielding new data management, correlation and visualization tools
Integrate emerging semantic technologies into the Navy’s net-centric warfare operations construct
Implement semantic-driven knowledge acquisition and discovery capabilities through present tactical data management services

4. Goals and Objectives…
Perform inferencing over bounded spatial, temporal and abstract properties
Represent uncertainty in the accumulated knowledge base
Create dynamic associations of data, “On Demand Schema” (ODS) within the network centric warfare operational environment “on the fly”

5. Technology Gaps Addressed…
The dynamic, rapid “on the fly” knowledge acquisition and discovery services essential to supporting the ongoing mission of the warfighter

6. Technical Concept…
Information discovery in multiple dimensions of interest, in temporal and spatial domains, in a dynamic environment
Temporal
Spatial

7. Underlying Database… Triple Store Table (subject, predicate, object)
On Demand Schema (ODS) Table
Note: There must be a rule in the ODS before a triple may be stored

8. The Implementation… 2,500 news feeds converted into triples and stored
RDFS vocabulary defined in the El Centro Core (Appendix A of the paper)
This was the first production use of the Semantic Knowledge Store (SKS)
Minor discrepancies will be worked out for a full up Ontology Web Language (OWL) implementation

9. The Implementation…
With the implementation problems were seen, such as the need for a “Self Tuner” to:
Reduce duplicate information
Delay the indexing of a feed
Display the most recent information
Note: A vocabulary for a Self Tuner was added the El Centro Core v 0.1 (see paper Appendix)

10. Conclusions…
The dynamic, rapid “on the fly” knowledge acquisition and discovery services are essential to supporting the ongoing mission of the modern warfighter
Prior to semantic technologies, managing schema complexity within dynamic context, offered few viable solutions

11. Semantic Technologies Program Manager
Dr. David J. Roberts
Semantic Technologies Program Manager
Point of Contact…