Ruisdael Data Catalog - PoC - presentation 2024.09.06
https://ruisdael-catalog.citg.tudelft.nl/
Goals of Data Catalog
- index and describe every dataset produced within Ruisdael Observatory, independently from where it is stored or published
- discover where each dataset is published/stored (via Property:servedBy which points to Category:DataService instances)
- identify the contact-point of each dataset, special relevant for unpublished datasets (via Property:contactPoint which points to Category:Foaf:Person instances)
Wiki: collaborative editing content management system
suitable to build and maintain a data catalog
- anyone with an account can enter and edit content
- anyone with or without an account the view the content
- forms and templates guide users' edits
- semantic properties and categories help organize and describe content in machine-readable ways, allowing for structured queries and dynamic content aggregation
- edit-history function allows reverting pages' content to previous versions
The software: Mediawiki (MW)
- Open Source Software
- Powers all Wikipedia instances and Wikidata
- Markup language - easily converted to/from Markdown, HTML, ...
- API
- ecosystem of extensions: ie Page Forms VisualEditor SMW
The extension: Semantic Mediawiki (SMW)
- Semantic annotations via property::value pairs and classes (categories)
- User defined semantic properties, classes (categories), queries, controlled-vocabularies
- RDF export
Data Catalog structure (schema)
The wiki (Data Catalog) contents are structure loosely around DCAT-AP [1]
It uses of terms from the following vocabularies:
- Data Catalogue vocabulary ( (DCAT)[2]: MediaWiki:Smw_import_dcat
- Dublin Core Metadata Terms(DCMI-Terms)[3]: MediaWiki:Smw_import_dcterms
- Friend of a Friend (FOAF)[4]: MediaWiki:Smw_import_foaf
Entering Data
Displaying / Searching data
- ↑ "DCAT Application profile for data portals in Europe (DCAT-AP) is a specification based on the Data Catalogue vocabulary (DCAT) for describing public sector datasets in Europe." https://op.europa.eu/nl/web/eu-vocabularies/dcat-ap
- ↑ https://www.w3.org/TR/vocab-dcat-3/
- ↑ https://www.dublincore.org/specifications/dublin-core/dcmi-terms/
- ↑ http://xmlns.com/foaf/spec/