Model driven crowdsourcing of search (CrowdSearch2012 workshop at www2012)

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Even though search systems are very efficient in retrieving world-wide information, they can not capture some peculiar aspects and features of user needs, such as subjective opinions and recommendations, or information that require local or domain specific expertise. In this kind of scenario, the human opinion provided by an expert or knowledgeable user can be more useful than any factual information retrieved by a search engine. In this paper we propose a model-driven approach for the specification of crowd-search tasks, i.e. activities where real people – in real time – take part to the generalized search process that involve search engines. In particular we define two models: the“Query Task Model”, representing the meta- model of the query that is submitted to the crowd and the associated answers; and the “User Interaction Model”, which shows how the user can interact with the query model to fulfill her needs. Our solution allows for a top-down design approach, from the crowd-search task design, down to the crowd answering system design. Our approach also grants automatic code generation thus leading to quick prototyping of search applications based on human responses collected over social networking or crowdsourcing platforms.

Technologie

A Model-Driven Approach for
Crowdsourcing Search
Alessandro Bozzon, Marco Brambilla, Andrea Mauri
Politecnico di Milano

Contact marco.brambilla@polimi.it
marcobrambi

CrowdSearch 2012 workshop @ World Wide Web Conference (WWW2012), Lyon, April 17th, 2012

Outline

• Rationale
• (Meta)Models
• Application
• Demo
• Outlook

SW Models + Social + Search =

MD CrowdSearch

Rationale: increasing quality in exploratory search

• From exploratory search
to friends and experts feedback
• Emphasis on social relations more than anonymous
crowds Initial
query

Exploration
Exploratory step Human
Search Search
System System

Exploration
step

System API Social API

Database / Crowd /
IR index Community

Deployment: Advantages of MDD

• Multiple social platform deployment

Generated query template

Embedded External Standalone
application application application

API
Social/ Crowd platform
Native
Embedding behaviours

Community / Crowd

Search task management problems

Task splitting: the collection is too complex relative to
the cognitive capabilities of users.
Task structuring: the task is too complex or too critical
to be executed in one shot.
Task routing: a task can be distributed according to the
values of some attribute of the collection.
User interaction: search tasks may imply complex UI
design

• Easy to address through a model-driven approach

Efficient development of CrowdSearch apps

Apply model-driven techniques to Social and Search:

MacroTask Description (BPMN)
M2M Transformation

MicroTask Description (BPMN)
M2M Transformation

User Interaction Model (WebML+ER)
M2T Transformations

Stand-alone Application embedded
application in social network

Model extensions for Social BPM
Process and applications models are extended to (task- or
incorporate social issues: login, post, tag, rate, share, ... Platform- specific)
Social Process Model Social Application Model

Comment

Vote

It is used to define:
It is used to define: •Exchange of user profiles from/to SN
•Social actors (e.g., Community Pools) •Social data (e.g., shared content)
•Social Activities (twittering, voting, following..) •Interface and components for social tasks (e.g.,
•Social events twittering, voting, tagging, following)

Based on BPMN social design patterns Based on WebML social components

The content (meta)model

Field 1 N Schema CrowdObject
N 1
Relation
N 1 Outgoing From
type: String name: String N 1 type: String
1 1
name: String N
Incoming To
idField
N

1
1
FieldInstance
User
value: String Input Output 1 N
N 1
user: String
Answer
password: String
N
1 N
email: String
N 1

Query
• Like N
• Add question: String
Responder Asker
• Comment type: String 1 N

• Modify open: boolean
• …

WebML models – question definition UI model
• user interaction + integration with social platform

Model for defining a question:

Model Driven Engineering of SocialSearch applications
• WebRatio (www.webratio.com), MDD tool that manages app development
in three steps:

Design Customize Generate
the Model the Rules the Application

• MDD Tools enable: fast prototyping, multi-platform deployment, model-
driven debugging, and early assessment of alternative strategies

Social experiments and quantitative evaluations
• See you on Friday, for the full paper presentation:
Answering Search Queries with CrowdSearcher
 Alessandro Bozzon, Marco Brambilla, Stefano Ceri

References
Thanks! • www.searchcomputing.org
•www.bpm4people.org
• www.cubrikproject.eu
Questions? •www.webratio.com

Contact:
Marco Brambilla
marco.brambilla@polimi.it
marcobrambi

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Model driven crowdsourcing of search (CrowdSearch2012 workshop at www2012)

1. A Model-Driven Approach for Crowdsourcing Search Alessandro Bozzon, Marco Brambilla, Andrea Mauri Politecnico di Milano Contact marco.brambilla@polimi.it marcobrambi CrowdSearch 2012 workshop @ World Wide Web Conference (WWW2012), Lyon, April 17th, 2012

2. Outline • Rationale • (Meta)Models • Application • Demo • Outlook

3. SW Models + Social + Search = MD CrowdSearch

4. Rationale: increasing quality in exploratory search • From exploratory search to friends and experts feedback • Emphasis on social relations more than anonymous crowds Initial query Exploration Exploratory step Human Search Search System System Exploration step System API Social API Database / Crowd / IR index Community

5. Example

6. Deployment: Advantages of MDD • Multiple social platform deployment Generated query template Embedded External Standalone application application application API Social/ Crowd platform Native Embedding behaviours Community / Crowd

7. Search task management problems Task splitting: the collection is too complex relative to the cognitive capabilities of users. Task structuring: the task is too complex or too critical to be executed in one shot. Task routing: a task can be distributed according to the values of some attribute of the collection. User interaction: search tasks may imply complex UI design • Easy to address through a model-driven approach

8. Efficient development of CrowdSearch apps Apply model-driven techniques to Social and Search: MacroTask Description (BPMN) M2M Transformation MicroTask Description (BPMN) M2M Transformation User Interaction Model (WebML+ER) M2T Transformations Stand-alone Application embedded application in social network

9. Model extensions for Social BPM Process and applications models are extended to (task- or incorporate social issues: login, post, tag, rate, share, ... Platform- specific) Social Process Model Social Application Model Comment Vote It is used to define: It is used to define: •Exchange of user profiles from/to SN •Social actors (e.g., Community Pools) •Social data (e.g., shared content) •Social Activities (twittering, voting, following..) •Interface and components for social tasks (e.g., •Social events twittering, voting, tagging, following) Based on BPMN social design patterns Based on WebML social components

10. The content (meta)model Field 1 N Schema CrowdObject N 1 Relation N 1 Outgoing From type: String name: String N 1 type: String 1 1 name: String N Incoming To idField N 1 1 FieldInstance User value: String Input Output 1 N N 1 user: String Answer password: String N 1 N email: String N 1 Query • Like N • Add question: String Responder Asker • Comment type: String 1 N • Modify open: boolean • …

11. WebML models – question definition UI model • user interaction + integration with social platform Model for defining a question:

12. WebML models – Response UI model

13. Rendering of the application (summary)

14. Model Driven Engineering of SocialSearch applications • WebRatio (www.webratio.com), MDD tool that manages app development in three steps: Design Customize Generate the Model the Rules the Application • MDD Tools enable: fast prototyping, multi-platform deployment, model- driven debugging, and early assessment of alternative strategies

15. Social experiments and quantitative evaluations • See you on Friday, for the full paper presentation: Answering Search Queries with CrowdSearcher  Alessandro Bozzon, Marco Brambilla, Stefano Ceri

16. References Thanks! • www.searchcomputing.org •www.bpm4people.org • www.cubrikproject.eu Questions? •www.webratio.com Contact: Marco Brambilla marco.brambilla@polimi.it marcobrambi

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