1. ConceptNet: Search ontology classes via human senses ---A proposal
Xiangqian Li
Jiwei Ding
Yuzhong Qu

2. Content Why? -Existing services
What? -A navigation based on concept-level hierarchy to locate to target classes
How? -Making senses of ontology classes via WordNet
How good? -Evaluation Design

3. Existing services Search with keywords. Snippets related to queries.
Filter with class/property or vocabularies.
Sort with query relatedness and importance in the data graph and list with multiple flipping pages.

4. Existing services Watson - able to search classes via keywords
No further functions
Snippets are poor

5. Existing services Swoogle - Not as good as its name.
Sinppets are poor.
No further functions

6. Existing services Sindice Have a rich-featured filter
Snippets are a little poor.

7. Existing services Falcon concept search Filter with vocabularies
Rich query-related snippets

8. Why ?
All of them rely on a good sorting and simple filters to locate to desired ontology classes.
Imagine a Semantic Web developer is willing to publishing data about cars. He needs related classes to annotate various entities.

9. Why?
search
car
automobile
vehicle
motocar
SUV
racecar
sedan
roadster

10. What ?
Nouns in WordNet constitute a connected unified taxonomy having hyponymy relations.
This taxonomy is human understandable.
It is based on the psychological model of human.
If a developer wants to find related ontology classes about vehicles or cars...

11. What ? . . . . . . car car, motocar, automobile
search
car, motocar, automobile
a motor vehicle with four wheels; usually propelled by an internal combustion engine.
subconcepts: bus, roadster, cruiser, jeep, sedan, ...
Search
with keywords
railcar, railway car, railroad car
a wheeled vehicle adapted to the rails of railroad.
subconcepts: van, mail car, cabin car, ...
cable car, car
a conveyance for passengers or freight on a cable railway.
is a compartment.
Search
with a specified
concept
elevator car, car
where passengers ride up and down.
is a compartment.

12. Sort with relateness to user intended concept and relateness to query.
Search with a concept
search in the results
search
(S)car, motocar X
Sort with relateness to user intended concept and relateness to query.
racing car
car, auto, automobile,
machine, motorcar
a motor vehicle with four wheels;
usually propelled by an internal
combustion engine.
Has parts:
Is a:
related terms:
All (100+)
is a auto,motocar
Namespace: XXX
Current (14)
racer
gasoline engine, petrol engine
race car, etc (144)
accelerator, accelerator pedal
is a race car
bus, etc (123)
bus
vehicle
Jeep, etc (113)
is a bus
rental, renting
sedan, etc (113)
Jeep
roadmap
is a jeep
passenger,rider
sports car, etc (83)
< 1 2 3
...... 13
>

13. Concept Navigation search in the results search racing car All (144)
(S)car,automobile
(S)race car,racer,etc X
racing car
car, auto, automobile,
machine, motorcar
a motor vehicle with four wheels;
usually propelled by an internal
combustion engine.
Has parts:
Is a:
related terms:
All (144)
is a auto,motocar
Namespace: XXX
Current (108)
racer
gasoline engine, petrol engine
stock car, etc (24)
accelerator, accelerator pedal
is a race car
finisher, etc (12)
codemaster
vehicle
is a finisher
rental, renting
tuner
roadmap
is a stock car
passenger,rider
< 1 2 3
...... 13
>

14. Search with keywords search in the results search car
(K)car X
car
Related concepts:
car, motocar, automobile
All (100+)
is a auto,motocar
Namespace: XXX
railcar, railway car, railroad car
Current (14)
racer
railcar, railway car, railroad car
racer, race car(144)
is a race car
cable car, car
jeep (123)
elevator car, car
bus
sports car (123)
is a bus
elevator car (123)
Jeep
is a Jeep
bus car (123)
< 1 2 3
...... 13
>

15. How ? Make sense of ontology classes via WordNet, a lexical database.
Synsets and hyponymy relations constitute a large unified taxonomy, in the perspective of human psychological model.
Offline mapping various ontology classes to WordNet synsets using various matchers and homomorphism constraint.

16. How ?
When an ontology class C is mapped to a synset S, it means in human conceptual understanding, C is one kind of S.
It is best when there is no hyponym synset S' of S that C is also one kind of S'.

17. How ? class hierarchy blocking & matching synset hyponymy graph SHG

18. How ? SHG block i Virtual Document Matcher
class
hierarchy
block i
Combination of multiple matchers
SHG
block i
Virtual Document
Matcher
Terminogical Matcher
set of class to synset mappings

19. How ? set of class to synset mappings
Select reliable mappings with combined method
based on homomorphism constraint
set of reliable class to synset
mappings

20. How good? ---Evaluation Design
Compare it to traditional approaches to search ontology classes.
It's best when these approaches are based on the same data indexes.
Searching tasks for participants to finish:
Suppose you are a SW developer. You want to retrieve related ontology classes about a topic(concept). Use various search services to finish the task. Score and give feedbacks.

21. How good?
Users can also give feedbacks when using the system. Report relateless searching results in the result list which is relateless to the current concept.

22. Thank you.