Content Registry Basic Concept

1
Management of Environmental Information in the
European Information and Observation Network
(EIONET)
Thom Pick, European Topic Centre on Catalogue of
Data Sources, Hannover Hannu Saarenmaa, European
Environment Agency, Copenhagen Kirsti Lounamaa,
TietoEnator, Helsinki
presented by Matthias Menger European Topic
Centre on Catalogue of Data Sources,
Hannover/Germany m_at_tteo.de
2
The Agency...
The European Environment Agency (EEA)
3
EIONET
The European Environment Information and
Observation Network (EIONET)
4
A Network of Networks
5
Current Situation
6
Target Situation
7
ReportNet
8
Directory
Manage information on persons, organisations,
roles, and contact details
9
Repository
Place for deliveries of data, information, and
knowledge to the international reporting system
10
Content Registry
Keeps track of the deliveries of data sets to the
international reporting system, and other content.
11
Content Registry - Basic Concept
Content registry
refere to
Data
harvest metadata
Descriptions
RDF, DCES
Metadata
Repositories
Data
12
Content Registry- Basic Concept
Transfer of metadata from services (repository)
to CR

• Put it into RDF, send to CR when requested
• RDF generated on the fly
• RDF pre-saved
• (Scenario for most of the services)
• Send it as objects via SOAP calls
• requires an API wrapper at the service side
• (Scenario for CIRCA)

13
Content Registry- Basic Concept
Metadata transfer with RDF
lt?xml version"1.0" encoding"iso-8859-1" ?gt
ltrdfRDF xmlnsrdf"http//www.w3.org/1999/
02/22-rdf-syntax-ns" xmlnsdc"http//purl.
org/dc/elements/1.1/"gt ltrdfDescription rdfabou
t"http//eea.eu.int/sdrat4"gt
ltdccreatorgtJensenlt/dccreatorgt
ltdctitlegtSignals 2002lt/dctitlegt
ltdclanguagegtEnglishlt/dclanguagegt
ltdctypegtReportlt/dctypegt ltdccoveragegtEUlt/dcc
overagegt ltdcrelationgt follow up of Signals
2001 lteionetrod-idgt78890lt/eionetrod-idgt
lt/dcrelationgt lt/rdfDescriptiongt lt/rdfRDFgt
Store into CR-DB
. . .
. . .
. . .
Store RDF into file system
14
Metadata Infrastructure for integrated EIONET
Services
15
Data Dictionary
ElementLongitude ltxsdelement name"longitude"gt
ltxsdannotationgt ltxsddocumentation
xmllang"en"gtThe measure of the angular distance
on a meridian east or west of the prime meridian.
/-DDD.dd to /-DDD.dddddd where Ddegree,
ddecimal degree, East and - West of the
prime meridian. A point on the prime meridian is
Eastern Hemisphere the 180th meridian is
Western. lt/xsddocumentationgt lt/xsdannotationgt
ltxsdcomplexTypegt ltxsdsimpleContentgt ltxsd
restriction base"xsddecimal"gt ltxsdminLength
value"7"/gt ltxsdmaxLength
value"11"/gt ltxsdpattern value\\-\d3\.
\d2,6"/gt ltxsdmaxExclusive
value"180.00"/gt ltxsdminInclusive
value"-180.00"/gt lt/xsdrestrictiongt lt/xsdsi
mpleContentgt lt/xsdcomplexTypegtlt/xsdelementgt
AggregateStation ltxsdelement name"station"gt ltx
sdcomplexTypegt ltxsdsequencegt ltxsdelement
namestationSizegt . lt/xsdelementgt
ltxsdelement namestationType"gt .
lt/xsdelementgt ltxsdelement
namestationLongitude" ref"longitude"/gt lt/xsd
sequencegt lt/xsdcomplexTypegtlt/xsdelementgt

• Registry for other applications and projects to
  refer to and share data definitions
• Stores definitions of data elements, their
  details and status.Browse, search, import, export
  functions

16
Obligations
Descriptions of the needs of data and information
17
Dependencies of ReportNet components
National data- bases and systems
Public web services
DEM
Data Dictio- nary
Search
Content Registry
Reposi- tory
Na- Mod
Indi- cators
Obliga- tions
Direc- tory
18
System Architecture
Java Runtime Environment
HTTP Server
WWW Browser
Browsing, searching modifying logic
HTTP
HTML
XML
User Interface shell
SOAP

• Applications
• data
• exchange
• modules
• data
• warehouses
• CIRCA
• ...

Database Handling
Business logic
Content Registry
JDBC
Import / Export logic
RDF repository
19
Multilingual Aspect - GEMET

• metainformation contain keywords of the
• General Multilingual Environmental Thesaurus
• consists of 5400 terms
• translated into 19 European languages
• polyhierarchical
• includes synonyms
• sorted by environmental themes

• GEMET is used also for discovery

20
Mapping GELOS against DC
21
Bridges
22
Swedish Environet

• Swedish EnviroNet DCES with its own extensions
  (DCQ)

23
DC and Environmental Information

• Environmental information resources become
  increasingly available through the internet.
• EIONET is adopting DCES for description and
  discovery of its information resources by
• extending DCES and DCQ with the missing
  elements and qualifiers, while fitting them with
  their domain specific themes and
• defining an individual namespace for each data
  element.
• ReportNet is the approach to integrate services
  based on DC.

24
The End...
matthias.menger_at_numis.niedersachsen.de
...is just the beginning
thom.pick_at_numis.niedersachsen.de
25
DC Environment InterestGroup
The Idea for such open forum might be

• to collect information on usage of DC in the
  environmental domain,
• to give guidance of the use of DC in the
  environmental domain,
• to install a forum for discussion of issues
  concerning DC with respect to environmental
  information resources,
• to develop an application profile for the
  environmental domain, based on DC
• to establish the representation of the
  environmental domain and their issues in DCMI
  (and vice versa?)

...
26
DCEnvironment InterestGroup

• ...
• to promote interoperability within the
  environmental domain through the use of dublin
  core
• to liaise with other communities in the
  environmental domain that do not use DC for their
  resources
• explore the possibilities to set up a DCMI
  Working Group for Environment

matthias.menger_at_numis.niedersachsen.de thom.pick_at_n
umis.niedersachsen.de