On Building Semantically Enhanced Location-Based Social Networks

Cláudio de Souza BaptistaLuciana Cavalcante de MenezesMaxwell Guimarães de Oliveira

Ana Gabrielle Ramos FalcãoLeandro Balby Marinho

IntroductionOntology for the DYSCS Platform

The DYSCS PlatformA DYSCS LBSN Instance

Conclusion

Outline

Introduction• Context• Problem• Goals

ONTODYSCS – Ontology for the DYSCS PlatformThe DYSCS Platform• Architecture • Interfaces• Functionalities

A DYSCS LBSN InstanceConclusion and Future Work

Conclusion

Outline

Conclusion

ContextProblemGoals

Context

Web 2.0• Blogs, Wikis, Social Networks, Social Content Sites, Mashups

ContextProblemGoals

Conclusion

Tools that promote colective action

Context

Web 2.0• Blogs, Wikis, Social Networks, Social Content Sites, Mashups

ContextProblemGoals

Conclusion

Tools that promote colective action

Context

Shared information

ContextProblemGoals

Conclusion

SAUDIO

Context

Geographic Content• Increase of information with geographic metadata• Popularization of maps mashups

ContextProblemGoals

Conclusion

Context

Social Content Sites• Join in one environment:

• Social network functionalities• Traditional information sharing (photographies, videos, text, etc.)

• Users of such sites can• Contribute with content for the site• Create a relashionship network

Location Based Social Networks

ContextProblemGoals

Conclusion

Challenges

How to organize and retrieve all this information?

ContextProblemGoals

Conclusion

Challenges

Social Annotations• Process in which the user associates a resource with a set

of keywords, known as TAGS

ContextProblemGoals

Conclusion

User + Tags + Resource = Social Annotation

Challenges

Geographic Social Annotations• GeoTags = Tags + Spatial Metadata (latitude, longitude)

ContextProblemGoals

Conclusion

User + GeoTags + Resource = Geographic Social Annotation

Tags Problems

Semantic problems• Polysemy

• A word with many meanings

ContextProblemGoals

Conclusion

Universidade Federal de Campina Grande

• Synonymy• Different words with equal or similar meaning

GeoTags Problems

Metadata underexploited by the systems• No use of spatial functions

• Buffer• Contains• ...

ContextProblemGoals

Conclusion

Challenges

How to minimize such problems and make the information processable by machines?

ContextProblemGoals

Conclusion

Challenges

How to minimize such problems and make the information processable by machines?

Semantic Web!

ContextProblemGoals

Conclusion

Challenges

In practice...Ontology• Model created for a

certain domain• Using formal

language

ContextProblemGoals

Conclusion

Semantic Web

In practice...Semantic Tags• Tag + Semantic Metadata

• URI that uniquely represents a existing resource on the Web

ContextProblemGoals

Conclusion

http://www.freebase.com/view/en/java

http://www.freebase.com/view/m/07sbkfb

Develop the DYSCS (Do iT YourSelf Social Content Sites) Web Platform

A Tool that... • will help users in the creation of LBSNs• on any domain• prioritizing semantic and geographic elements • in the organization and retrieval of shared information.

ContextProblemGoals

Conclusion

Creating an ontology to model the interactions on the Location Based Social Networks, considering the semantic and geographic aspects of the information

Using semantic tags in the organization and retrieval of the resources, with the goal of minimizing their limitations

Using geoTags

ContextProblemGoals

Conclusion

Creating search interfaces for the LBSN that further explore the stored geographic metadata

Facilitating the creation of semantic tags and geoTags

Creating multimodal interfaces for the LBSN aiming to facilitate the creation and visualization of the geographic information.

ContextProblemGoals

Conclusion

Outline

Conclusion

OntoDYSCS – An ontology for the DYSCS Platform

Conclusion

Developed to model interactions between users and resources of LBSN sites created by the DYSCS platform

Takes into account semantic and geographical aspects

Described using the OWL language

Uses well known ontologies and vocabularies (FOAF, DUBLIN CORE, MOAT, SIOC, GEOOWL, OWL-TIME)

Main Classes

Conclusion

scs:MeaningURI

tags:RestrictedTagging

moat:tagMeaning scs:has_location

gml:_Geometry

Geographic Metadata

Semantic Metadata

tags:taggedBy

tags:associatedTag

moat:Tag

tags:taggedResource

foaf:Person

owl:Thing

Social Annotation

Resource

Outline

Conclusion

ArchitectureInterfacesFunctionalities

The Proposed Platform

Conclusion

An Web environment which enables users to create their own LBSN sites

All information of created LBSN sites are stored using a model ontology

It is possible to perform searches like what? and where? both in the platform or the created LBSN sites due to the inclusion of semantic tags and geoTags in information storage and retrieval process.

DYSCS - Do iT YourSelf Social Content Sites

DYSCS Architecture

Conclusion

DYSCS Architecture

Conclusion

Visualization Layer

HTTP Tomcat

DYSCS Platform

JSPPages

+Javascript

Struts + Ajax

DYSCS Architecture

Conclusion

Control Layer

Multimedia Resources Manager ModuleUser’s Manager Module

LBSN Manager ModuleDYSCS Platform Manager Module

Semantic and Geographic Tag Manager Module

Information Discovery Module

Information Persistence Module

Jena + Java + JDBC

DYSCS Architecture

Conclusion

Persistence Layer

PostgreSQL + PostGIS

OntologyDatabase

Ontology

DYSCSowlGeographicDatabase

PostgreSQL

File Repository

Java JDBC

Interfaces

Conclusion

Semantic Tags

Conclusion

TopicSuggest Plugin of database

Semantic Tags

Conclusion

Social Semantic Annotation( User,

Resource,

Rei RC,

http://www.freebase.com/view/en/roberto_carlos)

Semantic Tags

Conclusion

TopicSuggest Plugin of database

Semantic Tags

Conclusion

Social Semantic and Geographic Annotation( User,

Resource,

http://www.freebase.com/view/en/campina_grande,

-7.22863 -35.89302)

Latitude Longitude

GeoTags

Conclusion

Google Maps –Geocoding API

GeoTags

Conclusion

Multimodal Interface

GeoTags

Conclusion

Social Geographic Annotation( User,

Resource,

Sugarloaf Mountain,

-22.94962 -43.156682)

Latitude Longitude

Functionalities

Conclusion

Users of DYSCS Platform

Create LBSN

Manage LBSN

Search LBSN

View LBSN

Functionalities

Conclusion

Users of LBSN created by DYSCS platform

Share Information

Search Information

Using Semantic Tags and/orGeoTags

Search Types

Conclusion

What? (meaning)

Where? (geo location)

Who? (user)

When? (date)

Which tags?

Information Type?

Search Types

Conclusion

I would like to know all posts which were

published by Pedro within Campina Grande

about the Biggest São João Festival in the World

that happened in 2010 .

1 What?

2 Where?

3 Who?

4 When?

5 Tags?

6 Information type?

Searches

Conclusion

Information Type?

Searches

Conclusion

Information Type?

Searches

Conclusion

Searches

Conclusion

Searches

Conclusion

Where?

Searches

Conclusion

Searches

Conclusion

Outline

Conclusion

A DYSCS LBSN Instance – A Case Study

Conclusion

Creation of a LBSN site about urban problems of the city of Rio de Janeiro

• Trash in the streets• Street holes• Spray graffiti• Sewer• Bad public lighting

LBSN site creation process

Conclusion

DYSCS platform authentication

Setting the site name

2General

Information Setup

3Defining the Geographic

Creation of Maps

Markers

Conclusion

Setting the LBSN name2

riodejaneiro

Problemas nas Ruas do Rio de J

Conclusion

General Information Setup3

Rio de Janeiro

RuasProblemasDenúnciasRio de Janeiro

Problemas nas Ruas do Rio de Janeiro

Este site é um espaço, onde todos osCidadãos que moram ou visitam a cidade do Rio de Janeiro, podem consultar ou realizar denúncias a respeito de problemas que acontecem nas ruas da cidade.

Conclusion

Rio de Janeiro

Definition of the LBSN's semantic tags

Conclusion

Rio de Janeiro

Definition of subtitle, description...

Conclusion

Definition of Geographic Scope4

Rio de Janeiro

Conclusion

Creation of Map Markers5

Definition of general information for markers

Informe problemas de buracos nas ruas do Rio de Janeiro

( Street hole )

Conclusion

Creation of Map Markers5

Definition of questions associated to markers

Conclusion

Creation of Maps Markers5

Marker Questions Icon

Street Hole What is the hole size?For how long has the hole been there?

Spray Graffiti

Where was the Spray Graffiti found (eg.: public building, square)?Have you ever found Spray Graffiti at the same location before?

Public Lighting

Are there light poles on site?Is it a residential area?Is it a dangerous area?

..... ..... .....

Conclusion

Adding Posts

Map markers

Informe problemas de buracos nas ruas do Rio de Janeiro

Conclusion

Created marker

Conclusion

Outline

Conclusion

Ontology for LBSN

Definition of a geographic scope for the LBSN

Semantic tags

GeoTags

Multimodal Web Interface

Ease of use of semantic tags and geoTags

Future Work

Conclusion

Incorporate trust features, concerning the shared information

Improve search for textual documents

Add recommender system services

Conclusion

Thank you!

Questions?

On Building Semantically Enhanced Location-Based Social Networks

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