Implementation of semantic network dictionary system

2006-11-09/117th Agricultural Ontology Service Workshop @ Bangalore, India

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Implementation of Semantic Network Dictionary System

for Global Observation Data

Shigenobu TACHIZUKA,Masahiko NAGAI, Ryosuke SHIBASAKI

Center of Spatial Information Sciencethe Univ. of Tokyo, JAPAN


2An understanding and prediction of an earth system

Distribution of abnormal weather, March 2002

average

temperature(

)℃

Malnutrition Population

China21%

India25%

Other Asia20%

Africa23%

SouthAmerica7%

Middle and near East4%

abnormal weather, climate change, flood damages, water or food crisis Poverty, Health, Safety


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GEOSS 10 Years Plan

Recommended Researches•Management of life cycle data•Data integration and Information fusion•Data mining•Network reinforcement•Suitable planning

Mutual management and Data system• Development and Acquisition for Common data, metadata, and product.• Processing, Analyzing, Visualizing for Huge and variety of data• Sharing and distribution by Internet service

Summit

2003,June Evian G8 Summit2003,July Washington 1st Earth observation Summit2004,April Tokyo 2nd Earth observation Summit2005,Feburauary Brussels 3rd Earth observation Summit

Global Earth Observation System of Systems(GEOSS ）: proposed an international cooperative attempt to gather accessible hardware and software for all of the nation.


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GEOSS 10 Years Plan

• The global environment is lying on trans-disciplinary fields, including...

• GEOSS has begun to make efforts to supply data and information at no cost by collecting data, enhancing data distribution, and providing models for global environment.

Hydrology

GeographyBiology

Ecology

Agriculture


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Abnormal Weather / Climate Change / Wind & Flood Damage / Food & Water Crisis 　→ Poverty ， Health ， Safety

Understanding and Prediction of Earth system Create new Knowledge for Earth System Science

For Social Needs

Numerical prediction

Flood prediction

Cooperationwith international

Organizations

Cooperationwith international

Organizations

Metrological information

Integrated use of data Agriculture managementDispersed

use

Predictionneeds

Integrated Information

Centralized Data Integration & Fusion

1. data archive, storage, integration

2. data assimilation, visualization, mining

3. design for database schema

4. data collection and distribution

5. sensor data fusion

Integration of Distributive Data

1. constriction of ontology registry

2. service by ontology registry

3. distinguished DB for agriculture

4. distinguished DB for satellite data

Core Systemdata

Integrated Information

Oceanic data

Flood data

Earth observation dataC

ollection/quality managem

ent

Cooperation with International Research Center

Satellite data

Ground observation data

Cooperation with Earth ObservationPlans

Integration method

Global Environmental Data Integration Project


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DB

DB

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A1:高度成長社会A2：多元化型B1:持続発展型B2：地域共存型

DB

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DB

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DB

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気象用語

biologyterm

Landuse Classification sc

hema

Climatology

Health Science

Agricultureterm

Hydrologyterm

农业

เกษตรกรรม

농업It is necessary to look over many fields andwe have to understand many technical terms


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DB

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DB

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気象用語

农业

เกษตรกรรม

농업

To guarantee data quality or

reliability.

To understand Trans - disciplinary database by

translation of heterogeneous “term”

Health Science

Climatology

To know where data is and what format is, and to access to heterogeneous

system.biology

term

Hydrologyterm

Agricultureterm

Landuse Classification sc

hema

Development of Semantic Network Directory system (collection, comparison, editing etc.)

Development of Ontology Service System by using Semantic Network Directory system


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Framework for Semantic Network Dictionary

SemanticNetwork Dictionary

Created dictionary is registered to the system again.

Clarifying ontological expressionVisualizing relationship between termsProviding reference information to users

(2) Browse

Modification of registered information on the system newest information

(3) Modification

Collection and registration the semantics

(1) Registration

(4) Utilization

Support of technical term

Data Integration Constriction of data model

Providing integrated informationUtilizing as knowledge

Information retrieval

future work


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Semantic Network Dictionary System

• To collect, manage, and compare ontological information such as data dictionaries, classification schemas, terminologies, and thesauri for the global observation data.

• Data sharing and data service such as support of metadata design, structuring of data contents, support of text mining is applied for better use of data to the semantic network dictionary system.

• As a trans-disciplinary dictionary including civil engendering, agriculture, classification schema, satellite observation data, and so on.

• We endeavor to add dictionaries and data model to the system by digitalizing text based dictionaries, developing “knowledge writing tool” for experts.


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•Searching•Browsing•Comparison•Connecting Semantic Network

System environment

experts

Semantic Network Dictionary System

DB

MediaWiki (Hydrology) MediaWiki (Agriculture) MediaWiki (Ecology)

RDF RDF RDF

modify modify modify

resist where the site is located

refer to semantics that is stored on each site


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Network connecting terms in semantics

Forest land•in Thailand•definitionhomonym

ClassForest land•in Indonesia•definition

ForestLand usemap

Globalworming

vegetation

Agro-forest

Wood land

Plant type

CO2

Dictionary

Validatedmodel

Document

Law

Code system

Non-validatedmodel

Thesaurus

Terminology

Ontology

Network development,from excising resource

Network development,from excising resource


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Data collection from existing dictionaries

Geography

Ecology

Health

Agriculture

Remote Sensing

Earth Science

Hydrology Environment


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Digitize from paper dictionaries

Input to MediaWiki


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(2) Browse


(3) Modification

Collection and registration semantics

(1) Registration

(4) Utilization

Assist of Technical term





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Browsing by MediaWiki


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Browsing of Semantic Network Dictionary System

Link to MediaWiki Description

Link to MediaWiki Editing page

Link to another term information

Get from each MediaWiki site via http

Get semantic network

from rdf statement(using Sesame)


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Visualization of Semantic Network

Users visualize the semantic information provided by the system.


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(2) Browse


(3) Modification

Collection and registration semantics

(1) Registration

(4) Utilization

Assist of Technical term





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Modification by using MediaWiki

Users modify the semantic information by using MediaWiki. We have not needed to develop the management function of editing history .


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Network can grow!

Forest land•in Thailand•definitionhomonym

ClassForest land•in Indonesia•definition

ForestLand usemap

Globalworming

vegetation

Agro-forest

Wood land

Plant type

CO2

Dictionary

Validatedmodel

Document

Law

Code system

Non-validatedmodel

Thesaurus

Terminology

Ontology

register register

usersregister

The semantic network can growby registration, addition, modification.. User can get new information.

The semantic network can growby registration, addition, modification.. User can get new information.

experts register

modification


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Future Works

• Adding dictionaries to this system.– Developing “Knowledge Writing Tool” for experts continuously.

(Extending MediaWiki)– Extracting semantic relations from authoritative documents with natural la

nguage processing technique.• handbook• encyclopedia

• Developing User Interface– more suitable for users

• Supporting for Diversification of clue – Miss spelling– Text and image

• verification for retrieval• Retrieval assist by similar images


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Thank you for your attention.

Shigenobu TACHIZUKA,Masahiko NAGAI, Ryosuke SHIBASAKI

Center of Spatial Information Sciencethe Univ. of Tokyo, JAPAN

[email protected]

Implementation of semantic network dictionary system

Education

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