Level 3 metadata should include the aspects from Level 1 and 2 and in addition the aspects discussed in this section. The table below shows the aspects which are based on our extensive literature review performed during earlier research by the authors. In order to measure these aspects we again make use of the metrics defined by Zaveri et al. [1]
Dimension | Definition | Source | Metrics |
---|---|---|---|
Description | A short description of the dataset, including its full name and original intended usage. | Dutch Government, ODI[2] | Text; presence of a tag to identify LOD |
Website with explanation | Website that gives explanation about the dataset and provides guidelines on how to use the dataset | Dutch Government | Link to website |
Provenance | Understand the issues of data creation, transformation, and copying. | Freire et al [3] | various from Zaveri [1] |
Use of vocabularies / codelists/ schemas | Are custom vocabularies or schemas which say what columns or properties the data contains used? | ODI | various from Zaveri |
LOD stars | Degree to which the dataset fulfills the linked open data criteria measured in stars (Tim Berners-Lee) | Dutch Government | 5 star system (Tim Berners-Lee) |
Temporal | Describes the time period covered by the dataset | Dutch Government | Timespan |
[1] Zaveri, Amrapali, et al. "Quality assessment methodologies for linked open data." Submitted to Semantic Web Journal (2013).
[2]https://certificates.theodi.org
[3]Freire, J., Koop, D., & Moreau, L. (2008). Second International Provenance and Annotation Workshop. Paper presented at the IPAW 2008, Salt Lake City, Utah.
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