Ruisdael Data Catalog - PoC - presentation 2024.09.06

From Ruisdael Observatory Data Catalog

https://ruisdael-catalog.citg.tudelft.nl/


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https://tinyurl.com/ys6mu7p9

PoC presentation recording - 2024.09.06

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  • identify the contact-point of each dataset, special relevant for unpublished datasets (via Property:contactPoint which points to Category:Foaf:Person instances)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

  • out-of-the-box content management system - Wiki
  • anyone with an account can enter and edit content
  • anyone with or without an account the view the content
  • forms and templates help guiding users' edits
  • semantic properties and categories 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)

schema-ruisdael-data-catalog.png

The wiki (Data Catalog) contents are structure loosely around DCAT-AP [1]

It uses of terms from the following vocabularies:

Organized, around the following categories:


More details in Help:Data_Catalog_Schema

Entering Data

From Main_Page#Ruisdael_Datasets

Create Dataset page with Form:Dataset

Or "Edit with Form" an existing page, ie Micro_Rain_Radar_(Metek)_at_Cabauw

Displaying / Searching data

Via query based, dynamic tables ie. Main Page. Or other outputs formats, ie. Datasets Map


Via search forms: Search Datasets


References

  1. "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
  2. https://www.w3.org/TR/vocab-dcat-3/
  3. https://www.dublincore.org/specifications/dublin-core/dcmi-terms/
  4. http://xmlns.com/foaf/spec/