SNS – Semantic Network Service Environmental Thesaurus/Terminology Workshop, Geneva 14-15 April...

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SNS – Semantic Network Service

Environmental Thesaurus/Terminology Workshop, Geneva 14-15 April 2004

Semantic Network Services

Dr. Maria Rüther

Umweltbundesamt, BerlinEmail: [email protected]

Thomas Bandholtz, Consultant

Email: [email protected]

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Shared vocabulary

1. a thesaurus of currently 39,143 environmental terms (UmThes®, German source of GEMET).Language: German – English

2. a gazetteer including the intersections between 48,213 geographical objects of all kinds. Language: German

3. a chronology of historical and contemporary events that have affected the environment, currently 593 events. Language: German - English

UmweltbundesamtUmweltbundesamt

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Thesa.Thesa.

ComponentComponent

preferredpreferred

broaderbroader

compositecomposite

relatedrelated

SynonymSynonym

DescriptorDescriptor

Morphology

LocationLocation

intersectsintersects Morphology

part ofpart of

Types / Layers

Coordinates

EventEvent

sequencesequenceMorphology

relatedrelated

Types

Temp. Extent

Integration in a Topic Map

TopicTopic

whatwhat

wherewhere

Associations between events, places names and descriptions


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An Example for associations

DescriptorDescriptor

TopicTopic

EventEvent LocationLocation

ConferenceConference CommunityCommunity

NationNation

climate conventionFirst UNFCC

Conference, Berlin3/28/1995 - 4/7/1995

Berlin

Deutschland

situated inbroader

wherewhat

International convention

occurrenceshttp://unfccc.int/cop5/resource/docs/cop1/07.htm

http://unfccc.int/cop5/resource/docs/cop1/07a01.htm

ThesaurusThesaurus

Topic classTopic instanceAssociation


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Accessing the topics by Web Services

SNS offers 3 services • findTopics searches the Topic Map for topics matching

the given parameters. The result is a flat list of matching topics, but no

associations.

• autoClassify provides automatic indexing. The text to be indexed can be passed by a character constant (document) or by web address (url).

The result is a list of significant topics that classify the document.

• getPSI (PSI= „Published Subject Identifier“) provides terminology reference by web address (url).

The result is a tree of associated topics.


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ready for use: Developer Toolkit & Documentation

gein® and GeoMIS.Bund are using these Web Services


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What comes next...

...possible

• Other applications integrate the SNS services• SNS extends the vocabulary for new users• SNS provides its technology for new services

http://www.semantic-network.de


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sns sns End of regular presentation


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How to reference a Thesaurus in ISO 19139

<keyword> <MD_KeywordTypeCode codeList="http://services.agency.int//getPSI?" codeListValue="WEU10"> drinking water quality </MD_KeywordTypeCode> </keyword>

What will http://services.agency.int//getPSI?WEU10 return?- a human-readable web page? -XML encoded description?

OGC Catalog Services ISO 19115geographic Metadata

ISO 19139XML Schema


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XML Formats for Thesaurus

• GEMET XML format – no Schema, no DTD – no standard !http://www.eionet.eu.int/GEMET

• SKOS-Core 1.0 RDF Schema by SWAD Europe Thesaurus Activity (W3C + IST) http://www.w3.org/2001/sw/Europe/reports/thes

• The ADL Thesaurus Protocol (Alexandria Digital Library)http://www.alexandria.ucsb.edu/~gjanee/thesaurus/specification.html

• Zthes: a Z39.50 Profile for Thesaurus Navigationhttp://lcweb.loc.gov/z3950/agency/profiles/zthes-04.html

or more general:

• XTM: XML Topic Map (ISO 13250)


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Technical platform used by SNS

• Oracle Database• J2EE Architecture• Open Source (Tomcat, Cocoon)• Web Services (W3C Web Service Activity)• XML Interchange format: XTM 1.0

(XML Topic Maps, ISO/IEC 13250)


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Searching the topics: www.semantic-network.de


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Öffentliche Umweltinformation im Web*

www.gein.de

To theTopic Map

* EU-Umwelt-informations-richtlinie,Novellierungdt. Umwelt-informations-gesetz


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Erweiterung der Topic Map

Thesa.

LocationTopic

Event

„Microthesauri“IndicatorsIndicatorsMethodsMethods SubstancesSubstances

regionregionregionregion regionregion

ActorsActors


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SNSSNS

Alpenkonvention

Datenbanken im UBA,integrierte Umweltbeobachtung

Neu: Koordinierungsstelle UDK/gein… einzelne Länder …

GEMET,Twinning-Projekte

GeoMis.Bund


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R&D Project May 2001 – December 2002

• „Development of a Semantic Network Service for theGerman Environmental Information Network (gein®)“(UFOPLAN-Ref. No. 20111612, promoted by BMU/UBA, Germany)

• Goals– Integration of the Environmental Thesaurus (UmThes), a

national gazetteer and a chronology of evironmental events in a common data model (topic maps)

– Building associations between the professional terms, places names and events

– Providing access to the network for other applications (e.g. gein®) by Web Services


SNS – Semantic Network Service Environmental Thesaurus/Terminology Workshop, Geneva 14-15 April...

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