The document discusses data models and ontologies. It references a paper on the complex relationship between linked data, semantic annotations, and ontologies. It also discusses how semantic rules can improve search queries and knowledge graphs, but generating rules at scale remains a challenge.

1. Have you ever wondered what....
….Ghostface is SCREAMing about?
Janowicz & Hitzler; Semantics for Big Data, AAAI 2013 Fall Symposium; Nov. 2013

2. Have you ever wondered what....
….Ghostface is SCREAMing about?

3. (ANSI) Data Models *
* There are many (slightly) different versions of this stack

4. (ANSI) Data Models

5. (ANSI) Data Models
Ontologies as domain independent layer on top of conceptual models

6. (ANSI) Data Models

7. (ANSI) Data Models
For details, see: Janowicz and Hitzler (2013): Thoughts on the complex relation between linked data, semantic annotations, and ontologies.

8. Do We Need Ontologies?
Query to Google's Knowledge Graph in 2012
For details, see: Janowicz and Hitzler (2013): Thoughts on the complex relation between linked data, semantic annotations, and ontologies.

9. A Little Semantics Goes a Long Way...
Query to Google's Knowledge Graph in 2013
Semantic Rule: stop counting years once a person dies (→ ontological commitment!)
…Try expressing this in OWL ;-)

10. … But How much is 'A Little'?
Fluidops maps the Moon's Copernicus crater to the Chad due to Dbpedia's false use of
the W3C Basic Geo specs.*
* See: http://stko.geog.ucsb.edu/location_linked_data for details.

11. How To Make Rule Generation Scale?