Level 2: minimal metadata

Level 2 metadata should include the basic aspects from Level 1 and in addition the aspects shown in the table below which are based on our extensive literature review performed during earlier research by the authors. In order to measure these aspects we make, where possible use of the metrics defined by Zaveri et al. [1]

Dimension	Definition	Source	Metrics
Release	One-off vs. ongoing release. Single vs. a set or series of related datasets. Is it a service or API for accessing data?	ODI[2]	Frequency of release
Potential Use	What can users do with it? What sort of question can it answer? Topic tags can be used to structure this aspect.	LATC [3]	Topic Tags
Compliance	To which regulations/rules does it comply?	ISO 9126 [4]	Link to regulations
Production Date	The date the dataset has been created. This might also include information about the last modification date or version of the data set.	Ehling & Körner [5]	Date and time
Format: Open Format	Information about the format in which the dataset is provided, especially focusing on if the data is available in a standard open format.	ODI, Dutch Government	Format used (JSON, XML, RDF, CSV etc. )
Kind of data (Type of data)	Unstructured (human readable data), statistical data (counts, percentages), Geo data (points, boundaries), other structured data.	ODI, Dutch Government	various from Zaveri [1]
Language	The language that is used in the dataset	Dutch Government	Natural language used
Spatial	Describes the area/ territory covered by the dataset	Dutch Government	Province, national, international
Semantics	Understandability: Extend to which data are clear without ambiguity and easily comprehended	ODI, Knight & Burn [6]	various from Zaveri
Data model	Is there a data model describing the objects represented by a computer system together with their properties and relationships.		Availability of data model
Links	Coherent links to other datasets.	Ehling & Körner	various from Zaveri
Size	The size of the datasets, e.g. the amount of triples, or megabytes.	Dutch Government	various from Zaveri
Concise	Extend to which information is compactly represented without being overwhelming.	Knight & Burn	various from Zaveri
Complete	Is the datasets complete or are there certain parts missing?	Knight & Burn	various from Zaveri
Believability	Extent to which dataset is regarded as true and credible.	Knight & Burn	meta-information about the identity of information provider, various from Zaveri
Reputation	Extent to which dataset is highly regarded in terms of source or content.	Knight & Burn	various from Zaveri

The last four metadata dimensions are of less objective than the other dimensions. Data publishers might first need to get input from users, such as subjective judgments, before they are able to provide metadata information about these aspects for a specific dataset.

[1] Zaveri, Amrapali, et al. "Quality assessment methodologies for linked open data." Submitted to Semantic Web Journal (2013).

[2]https://certificates.theodi.org

[3]https://docs.google.com/document/d/150dJSMZk5W5ucF23hGj62DaoKtTk9qeaEPBN_VCCihI/edit?pli=1

[4]ISO/IEC. (2003). ISO/IEC 9126-2 Software engineering - Product quality - Part 2: External metrics.

[5]Ehling, M., & Körner, T. (Eds.). (2007). Handbook on Data Quality Assessment Methods and Tools. Wiesbaden.

[6]Knight, S. A., & Burn, J. (2005). Developing a framework for assessing information quality on the World Wide Web. Informing Science, 8, 159-172.

Go back to Metadata overview

Een gegevensverzameling is een verzameling RDF-triples, die wordt gepubliceerd, onderhouden of geaggregeerd door één aanbieder.

Weergave van een feit, begrip of aanwijzing, geschikt voor overdracht, interpretatie of verwerking door een persoon of apparaat

Open Data Institute (ODI).

JSON (JavaScript Object Notation) is een lichtgewicht data-uitwisselingsformaat. Het is gemakkelijk voor mensen om te lezen en te schrijven. Machines kunnen gemakkelijk worden ontleed en gegenereerd. Het is gebaseerd op een subset van de JavaScript-programmeertaal,

Resource Description Framework (RDF) is een standaardmodel voor gegevensuitwisseling op het web. RDF heeft functies die het samenvoegen van gegevens vergemakkelijken, zelfs als de onderliggende schema's verschillen, en het ondersteunt specifiek de evolutie van schema's in de loop van de tijd zonder dat alle gegevensgebruikers moeten worden gewijzigd.

Als in OWL properties of RDFS properties.

Het wereldwijde web (www) ook wel met de Engelse term 'world wide web' aangeduid, maar meestal kortweg het web, houdt in:

• een aantal technische afspraken voor het wereldwijd over het internet aanbieden en verbinden van allerhande documenten en computertoepassingen;
• de verzameling documenten en toepassingen die wereldwijd volgens dit systeem over het internet worden aangeboden.