GeoDCAT-AP in Flanders - Joinup · 2019-07-16 · SDI-Flanders Best Practices Profile: Geo MD ISO...
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www.vlaanderen.be/informatievlaanderen Mathias De Schrijver Dirk De Baere Geraldine Nolf GeoDCAT-AP in Flanders ISA² webinar: GeoDCAT-AP July 16 th , 2019
Transcript of GeoDCAT-AP in Flanders - Joinup · 2019-07-16 · SDI-Flanders Best Practices Profile: Geo MD ISO...
www.vlaanderen.be/informatievlaanderen
Mathias De SchrijverDirk De BaereGeraldine Nolf
GeoDCAT-AP in Flanders
ISA² webinar: GeoDCAT-APJuly 16th, 2019
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LOTS OF METADATA STANDARDS, PORTALS AND SYSTEMS
GeoDCAT-AP webinar ISA² – July 16th, 2019
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BRINGING MISS WORLD AND MISTER CUBE TOGETHER AND OPEN UP DATA
GeoDCAT-AP webinar ISA² – July 16th, 2019
Copyright Miss Globe & Mr Cube: Frans Knibbe, Geodan
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Geospatial dataISO/INSPIRE
SDI-Flanders Best Practices
Profile: Geo MD ISO “19XXX”
Export:
ISO “19XXX” XML
Geopunt(Sitecore & MapApps)
Open data
DCAT-AP
Profile: Open MD “DCAT-AP XML”
Export:
DCAT-AP RDF
Vlaams Open data Portaal (CKAN)
Metadata standard
Metadata
management system
Metadata portal
Export: GeoDCAT-AP
BRIDGING THE GAP USING GEONETWORK
GeoDCAT-AP webinar ISA² – July 16th, 2019
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Geospatial dataISO/INSPIRE
SDI-Flanders Best Practices
Profile: Geo MD ISO “19XXX”
Export:
ISO “19XXX” XML
Geopunt(Sitecore & MapApps)
Open data
DCAT-AP
Profile: Open MD “DCAT-AP XML”
Export:
DCAT-AP RDF
Vlaams Open data Portaal (CKAN)
Metadata standard
Metadata
management system
Metadata portal
Export: GeoDCAT-AP
BRIDGING THE GAP USING GEONETWORK
GeoDCAT-AP webinar ISA² – July 16th, 2019
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Geospatial dataISO/INSPIRE
SDI-Flanders Best Practices
Profile: Geo MD ISO “19XXX”
Export:
ISO “19XXX” XML
Geopunt(Sitecore & MapApps)
Open data
DCAT-AP
Profile: Open MD “DCAT-AP XML”
Export:
DCAT-AP RDF
Vlaams Open data Portaal (CKAN)
Metadata standard
Metadata
management system
Metadata portal
Export: GeoDCAT-AP
BRIDGING THE GAP USING GEONETWORK
DCAT-AP plug-in to be
build
Upgrade to GeoNetwork 3.4 or higher
GeoDCAT-AP webinar ISA² – July 16th, 2019
> GeoNetwork can only process XML-based metadata
▪ So, an XML Schema plug-in must be defined
> Based on DCAT-AP v1.1
> Developed by GIM, funded by Informatie Vlaanderen
> Beta environment:http://beta.metadata.vlaanderen.be/
> Available as open-source software (GPLv2 license):https://github.com/metadata101/dcat-ap1.1
XML SCHEMA PLUG-IN FOR DCAT-AP
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> XML Schema: The plug-in defines its own XML Schema. The XML Schema was designed to fully resemble an XML/RDF syntax of DCAT-AP.
> Harvester: A DCAT-AP harvester was written to "normalize" the RDF metadata, such that it fits in the XML Schema for DCAT-AP.
> Editor: A custom form was created that uses the controlled vocabularies required by DCAT-AP.
> Adding licenses: Sample licenses templates can be imported via the custom form for editing.
> Multilingual: The editor, view, and search benefit from the already existing multilingual capabilities of GeoNetwork.
> Validator: Validation steps are XSD validation followed by the schematronvalidation.
> RDF endpoint: The plug-in exports DCAT-AP RDF metadata using the GeoNetwork API, which can in turn be harvested by e.g. CKAN.
DCAT-AP PLUG-IN FEATURES
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DCAT-AP HARVESTER
➢ XML is a nested data structure that can be queried with Xpath➢ RDF is a graph-based data structure in different formats and
arbitrarily structured that can be queried with SPARQL
➢ On import, DCAT-RDF metadata must be “normalised”
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DCAT-XML
DCAT-RDF
XSLT (trivial)
SPARQL SELECT +XSLT
harvesting
SPARQL CONSTRUCT XSLT
DCAT-AP records
normalisedDCAT-XML
> Input: Turtle, RDF/XML, N3, JSON-LD
DCAT-AP HARVESTER
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> Simple and advanced form for editing DCAT-AP records
> Multilingual
> Controlled vocabulariesrequired by DCAT-AP as thesauri
> Reuse (with modification) of existing controls (e.g. spatial extent)
DCAT-AP EDITOR
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> DCAT-AP constraints have been transformed into threeschematron rulesets:
▪ DCAT-AP v1.1 mandatory rules
▪ DCAT-AP v1.1 recommendations
▪ DCAT-AP-VL (additional) mandatory rules for publishingopen data
DCAT-AP VALIDATOR
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> Exports DCAT-AP RDF using standard GeoNetwork API
> Supports W3C LDP paging and hydra paging
> Output: RDF/XML
DCAT-AP RDF ENDPOINT
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DCAT-XML
DCAT-RDF
XSLT (trivial)
SPARQL SELECT +XSLT
via RDF endpoint
SPARQL CONSTRUCT XSLT
DCAT-AP records
normalisedDCAT-XML
> Usability of validator (link with fields)
> Harvester with paging support
> RDF endpoint: multiple formats
> Schema.org integration (JSON.LD on HTML pages)
ROOM FOR IMPROVEMENT
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TOWARDS ONE CATALOGUE
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INFORMATION CATALOGUE (1)
GeoDCAT-AP webinar ISA² – July 16th, 2019 16
Geograficdata &
services
ISO/INSPIRE
GeoNetwork
Geopunt
Data/Services
Open data
DCAT-AP
CKAN/TDT GeoNetwork
Vlaams Open data Portaal
Data
Data concerning
naturalpersons &
enterprises
(to be –DCAT-AP ?)
(to be –GeoNetwork ?)
MAGDA-online
Data/Services
API’s
(to be –DCAT-AP?)
(to be – Apigee / GeoNetwork?)
(to be)
ServicesAPI’s
Statisticdata &
services
SDMX / StatDCAT ?
(to be –GeoNetwork ?)
(to be)
Statistics/Services
ArchivalInformation
EAD
(to be –GeoNetwork ?)
(to be)
Documents
…
…
…
…
…
Metadata Standard
Sco
pe
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Scope Information Catalogue
Metadata Management System
Publication via Portal / Catalogue
Data / Information
Information Catalogue
www.vlaanderen.be/informatievlaanderen
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