# Linked Open Government Data: Still a Viable Option for Sharing and Integrating Public Data?
## 7 What Valuable Examples of LOGD Adoption Can Be Found Today?
### European Data Portal  
The official portal for European data ([[https://data.europa.eu](https://data.europa.eu)]([https://data.europa.eu](https://data.europa.eu)) (accessed on 1 February 2024)) acts as a center for accessing open data in Europe via a variety of geodata national, regional, local, and international portals. It collects more than one and a half million datasets harvested from 182 national and institutional catalogs hosted in 36 countries. The European Data Portal and the former EU Open Data Portal are combined in the official portal for European data to encourage people, companies, and organizations to reuse and easily access European open data. Notably, the European portal leverages LD principles and artifacts in diverse ways. It builds upon established controlled vocabularies like Eurovoc. The recommended and preferred method for data provision involves utilizing a DCAT-AP metadata model, facilitating effective catalog harvesting from source catalogs. Notably, all metadata on the portal are structured as RDF triples, allowing easy querying using the SPARQL query language at the specified endpoint. Using SPARQL search empowers advanced users to locate datasets; SPARQL proves valuable in extracting specific information from extensive RDF datasets, even when they are organized in a complex manner. Queries can be executed seamlessly through the machine-readable endpoint ([[https://data.europa.eu/sparql](https://data.europa.eu/sparql)]([https://data.europa.eu/sparql](https://data.europa.eu/sparql)) (accessed on 1 February 2024)). For example, via the European Data portal's SPARQL endpoint, we can discover that 35 data catalogs expose at least a dataset distribution in OWL, RDF, or SPARQL (see SPARQL query Listing 1 ([[https://api.triplydb.com/s/Qd3](https://api.triplydb.com/s/Qd3) vDgKDu]([https://api.triplydb.com/s/Qd3](https://api.triplydb.com/s/Qd3) vDgKDu) (accessed on 1 February 2024))).  
```
PREFIXrdfs:<[[http://www.w3.org/2000/01/rdf-schema#](http://www.w3.org/2000/01/rdf-schema#)]([http://www.w3.org/2000/01/rdf-schema#](http://www.w3.org/2000/01/rdf-schema#))> PREFIXrdf:<[[http://www.w3.org/1999/022-rdf-syntax-ms#](http://www.w3.org/1999/022-rdf-syntax-ms#)]([http://www.w3.org/1999/022-rdf-syntax-ms#](http://www.w3.org/1999/022-rdf-syntax-ms#))> PREFIXrdf:<[[http://purl.org/d/terms/](http://purl.org/d/terms/)]([http://purl.org/d/terms/](http://purl.org/d/terms/))> PREFIXrdf:<[[http://www.w3.org/ns/dcat#](http://www.w3.org/ns/dcat#)]([http://www.w3.org/ns/dcat#](http://www.w3.org/ns/dcat#))> SELECT(count(distinct?catalog)as?numberOfCatalog){ {?distributiondet:format?format.filter(regex(str(?format),\"RDF\",\"1\")).} UNION{?distributiondet:format?format.filter(regex(str(?format),\"SPARCL\",\"1\")).} UNION{?distributiondet:format?format.filter(regex(str(?format),\"OUL\",\"1\"))}?catalogdcat:dataset?dataset.?datasetdcat:distribution?distribution. }
```  
Listing 1: Number of catalogs on data.europa.eu providing OWL, RDF, or SPARQL distributions.  
This piece of information can be obtained via a SPARQL query but it is not as straightforward through the data portal interface, as the primary focus of the portal interface is on locating datasets based on format, producer, and themes rather than facilitating a comprehensive examination of features and statistics derived from the entire data collection.  
For additional guidance and details, refer to the documentation ([[https://dataeuropa.gitlab.io/data-provider-manual/pdf/documentation_data-europa-eu_V1.0.pdf](https://dataeuropa.gitlab.io/data-provider-manual/pdf/documentation_data-europa-eu_V1.0.pdf)]([https://dataeuropa.gitlab.io/data-provider-manual/pdf/documentation_data-europa-eu_V1.0.pdf](https://dataeuropa.gitlab.io/data-provider-manual/pdf/documentation_data-europa-eu_V1.0.pdf)) (accessed on 1 February 2024)).