Metadata Concepts / Use in Climate Research

Stephan Kindermann, Martina Stockhause

German Climate Computing Center (DKRZ)

Hamburg, Germany

Metadata descriptions: sources, usage

data level, preservation level, model level, domain knowledge level

Metadata standards, IT-principles

(I) Data Description Level:

source: model run output format: gib, netcdf3/4 container formats (including basic metadata) metadata homogenization („Climate and Forecast Convention (CF)“

conformance, CMOR2 compliance, controlled vocabs)

usage: analysis tools, data access script, data search ( „linked data principle“)

(II) Data Preservation Level:

target: legacy data centers (e.g. WDCC) format: internal DB, various external formats, e.g. ISO 19139, DIF, .. usage: long term data storage and access, citation e.g. using DOIs

(IIl) Model Description Level: source: Researcher interviews, online questionnaire

format: CIM (Climate Metadata for Climate Modelling Digital Repositories - Metafor FP7)

Con-CIM: UML, APP-CIM: XSD + vocabs)

usage: model intercomparison, scientific portals, information space browsing / search

(lV) Semantic Annotion Level: source: data metadata, model metadata, domain knowledge

metadata format: OWL (RDF) usage: user navigation in portals, „faceted search“ etc. deployments: Earth System Grid CMIP5 portal, IS-ENES portal

(I) Data Description Level:

Grib, netcdf

data containers

10`s of PBytes

Metadata

Data

File naming convention based on CVs building uniform URIs (DRS, Data Reference Syntax)

Activity/Product/Institute/Model/Exp/frequ/realm/Variable/ensemble

Data serversMD catalogue

servers

wget http://server.org/Activity/Product/../ensemble

Enabling „linked data“

(II) Data Preservation Level:

CERA2 DB

schema

OWL conceptual model

Tape Archive

search API

QC, DOI assignment

, ..

WDCC Metadata Concept

CERA GUI IS-ENES Portal …

•Scalability

•Sustainability

•Flexibility

•User friendly GUIs

CommonCV

(III) Model Description Level:

Metafor FP7 project: Common Information Model (CIM)

Formal metadata model of the climate modelling process

It includes descriptions of the experiments being undertaken, the

simulations being run in support of these experiments, the software

models and tools being used to implement the simulations and the

data generated by the software.

CMIP5 use case: CV collection, CMIP5 questionnaire

CONCIM (UML)

APPCIM (XSD)

CIM Instances (interliked XML files)

ISO, Geographic Markup Language

(GML) series

Automatic translation

CMIP5 portal(s)IS-ENES portal

Metafor catalogue

Automatic XML RDF translation

CMIP5 gateway(s)

IS-ENES1 portal

1Infrastructure for the European Network for Earth System Modelling

ESG OWL instances

B) Metadata standards, IT principles

(IV) Semantic Annotation Level

CIMXML

RDF

Data objectXML

Communitycontent

Content Management

System

RDF

TripleStore

Portal(s)

ESG Gateways

IS-ENESPortal

Evolving OWL model

TripleStore

OWL ontologies:

http://ontologies.ucar.edu/owl

Rel.DB

CMIP5 Quality Control

Files Data Metadata CIM Metadata

Datain prescribedDRS Syntax

Data QualityChecks L2

MD QualityChecks L2

THREDDSData Server

MD on data

Metafor / CIMQuestionnaire

MD onmodel+simulation

QC DB

Quality MD

MetadataRepository

Data MD Information MD

CMIP5 STD-DOI Publication

TIB:DOIRegistrationAgency

Data Node Metadata

THREDDSData Server

MD on data

QC DB

QualityMD

Data MD InformationMD

Filesystem

Data

LongtermArchive

Data QualityChecks L3double check,cross checks

STD-DOICatalogue

STD-DOI MD Information MD

WDCC:DOI Publication Agent

DOI Target Page

access todata andmetadata

Metafor / CIMMD on

model+simulation+data+quality

B) Metadata standards, IT principles

(IV) Semantic Annotation Level

CIMXML

RDF

Data objectXML

Communitycontent

Content Management

System

RDF

TripleStore

Portal(s)

ESG Gateways

IS-ENESPortal

Evolving OWL model

TripleStore

OWL ontologies:

http://ontologies.ucar.edu/owl

Rel.DB

2010-07-07 16:49:13 INFO triplestorefill.utility Adding item<ComponentModel at /test7/echam> with ID echam athttp://localhost:8080/test7/echam2010-07-07 16:49:13 INFO triplestorefill.sesameconnector Storing RDF...(1118 byte)2010-07-07 16:49:13 INFO triplestorefill.sesameconnector RDF data:@prefix foaf: <http://xmlns.com/foaf/0.1/> .@prefix owl: <http://www.w3.org/2002/07/owl#> .@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .@prefix dc: <http://purl.org/dc/elements/1.1/> .@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .@prefix isenes: <http://www.enes.org/isenes#> .isenes:echam rdf:type isenes:ComponentModel .isenes:echam foaf:page <http://plone.dkrz.de/test7/echam> .<http://plone.dkrz.de/test7/echam> foaf:topic isenes:echam .isenes:echam dc:title "ECHAM" .isenes:echam rdfs:label "ECHAM" .isenes:echam rdfs:comment "Global circulation model" .isenes:dkrz isenes:isResponsibleFor isenes:echam .isenes:echam isenes:hasResponsible isenes:dkrz .isenes:joachim-biercamp rdfs:label "Joachim Biercamp" .isenes:joachim-biercamp rdf:type foaf:Person .isenes:dkrz rdfs:label "DKRZ" .isenes:dkrz rdf:type foaf:Organization .isenes:joachim-biercamp isenes:isMemberOf isenes:dkrz .isenes:dkrz isenes:hasMember isenes:joachim-biercamp .isenes:dkrz dc:title "DKRZ" .isenes:joachim-biercamp foaf:mbox "biercamp@dkrz.de"

„save“

Triple Store

Bildchen: Plone seite mit „related info“ portlet

Bildchen: Plone Seite nach Klick auf „related“ link: faceted search

Summary

• international CMIP5 / IPCC effort is key driver for collection / standardization of CVs, Metadata, conceptual models (Ontologies)

• Metadata mainly used for model intercomparison, uniform data search / access + data processing

Prepare for Climate Impact Community use cases !!

- Usage and quality of descriptive keyword type of metadata used in your domain to manage

data.

- Types of usages of this metadata (management, retrieval, research statistics, machine

processing, etc).

- The standards used for your metadata descriptions (structure, elements, vocabularies).

- Adherence to common IT principles (explicit syntax, registered semantics, use of PIDs, etc).

- Compliance with the recommendations to be found in the report of the e-IRG task force on

Data Management http://www.e-irg.eu/publications/e-irg-task-force-reports.html

..therefore we would like the presenters to focus on a few points allowing all of us to draw conclusions at the end:

Producers: providers of models, tools, model

results, HPC ecosystem, Grid .., community

Motivation Consumers: ENES community, impact

community

Virtual Earth System Modeling Resource Centre

Portal

E-infrastructure components

GovernanceAgreements,

Commitments,Sociology,..

TicketingCollaboration

Metadata (CIM,..) Protocols

APIs

AAICMIP5/AR5/+data services

IS-ENES vERC Portal

(A) Community info presentation (models, tools, descriptions,..)

Content Management Sytem (CMS, Collab.Tool)

Requirement E-Infra component Technology used

Plone + IS-ENES „content-types“

(C) Data portal to AR5 archives Web Framework Zope/Plone plugin(s)

(F) Additional value provisioning

„Cross-selling“Semantic interlinking

RDF triple store (Sesame)

(D) CIM metadata (external) Metafor service(s)(external) ESG-gateway

(E) External content / metadata collection

Web service (proxies)

Info (XML) harvesterPython info collector based using Atom, OAI-PMH,.. protocols

(B) Community development support Project Management / Ticketing Tool

Redmine