1. Oregon Presentation to UC Santa Barbara, December 1, 20001 Technology for Superimposed Information Lois Delcambre, David Maier Shawn Bowers, Mat Weaver Database and Object Technology Lab Computer Science and Engineering Department Oregon Graduate Institute

2. Oregon Presentation to UC Santa Barbara, December 1, 20002 What is Superimposed Information? data “placed over” existing information sources to:  highlight  annotate  elaborate  select  collect  organize  connect  reuse information elements often to support new applications, beyond the original

3. Oregon Presentation to UC Santa Barbara, December 1, 20003 The superimposed and base layers with marks Superimposed Layer Base Layer Information Source 1 Information Source 2 Information Source n … marks

4. Oregon Presentation to UC Santa Barbara, December 1, 20004 Superimposed Layer Information Manager (SLIM) Architecture: Contributions Mark Management - to create/resolve marks SLIM API - for the application developer TRIM store - for generic storage of superimposed information

5. Oregon Presentation to UC Santa Barbara, December 1, 20005

6. Oregon Presentation to UC Santa Barbara, December 1, 20006

7. Oregon Presentation to UC Santa Barbara, December 1, 20007 SLIM API: as seen by application

8. Oregon Presentation to UC Santa Barbara, December 1, 20008

9. Oregon Presentation to UC Santa Barbara, December 1, 20009 Model Schema Data Instance Data with Marks Information Source 1 Information Source 2 Superimposed Layer Base Layer marks Model-Based Superimposed Information But the model and schema are optional

10. Oregon Presentation to UC Santa Barbara, December 1, 200010 The Metamodel Provides a level of abstraction above models Describes the structural features of models Topic Map Topic Map Defintions Topic Map Instances XML DTD XML Document Basic Set of Abstractions Model Constructs and Relationships Schema-Level Data Instance-Level Data Metamodel

11. Oregon Presentation to UC Santa Barbara, December 1, 200011 XML Model, Schema, and Instance Elements, Element Types, Attributes, Attribute Types Elements contain Attributes Elements can be nested PDX YVR $213.84... XML Model XML DTD (Schema) XML Document (Instances) Model constructs and relationships defined using the metamodel

12. Oregon Presentation to UC Santa Barbara, December 1, 200012 Basic Types of Mappings Mapped Converted Inter-Model Inter-Schema Model-to-Schema Model 2 Schema 1 Instances 1 Model 1 Schema 1 Instances 1 Model 1 Schema 1 Instances 1 Model 1 Schema 1 Instances 1 Model 1 Schema 2 Instances 1 Model 2 Schema 2 Instances 2 Mapped