Linked Open Data FAQ
This page addresses the most important points of the Linked Open Data pilot.
Why is Linked Open Data important for Europeana and its community?
Releasing Europeana metadata as Linked Open Data is important for Europeana, its partners and third parties. Linked Open Data has a key role in the Europeana Strategy 2015-2020 and supports the idea that Europeana is a platform where users can access data.
How can data.europeana.eu contribute to these goals ?
First, Linked Data is a publishing technique that enables related data to be connected and makes it easily accessible using common Web technologies. See this White Paper for further discussion on the scientific interest of Linked Data for the Europeana community.
Second, Linked Open Data realises this in an open manner, where everyone can access, re-use, enrich and share the data published. See this business document for further explanation on why Europeana and its partners should open the metadata they gather from all around Europe, and the Use our data section of our site for general information on Europeana’s efforts. You may also be interested in this paper at Museum & the Web that gives interesting context and pointers to current Linked Open Data developments.
What does our Linked Open Data look like?
The data served by data.europeana.eu is generated from the metadata Europeana has harvested using the Europeana Data Model (EDM). To make this data amenable to Linked Data publishing, we have converted it to the Resource Description Framework (RDF) format, and structured it using EDM. We give more detail on the EDM data we publish on the Data Structure page.
The data harvested by Europeana may include links to Linked Open Data resources such as as AAT, GND, Iconclass,VIAF or any domain vocabulary following the EDM recommendations for metadata on contextual resources.
In addition to the original data harvested by Europeana from its data providers, the data served at data.europeana.eu includes:
- semantic enrichment done at the Europeana Office, connecting Europeana objects to structured representations of places (using GeoNames, concepts (using the GEMET thesaurus), people (using DBpedia) and time periods (from an adhoc time period vocabulary).
How can you access, use and contribute to Europeana’s Linked Open Data?
As this project is about engaging users from different communities, we’ve made sure that data from the service can be accessed, re-used, enriched and shared by everyone.
data.europeana.eu is serving metadata following the terms of the Creative Commons CC0 public domain dedication.
Data can be access via the SPARQL end-point. You can also fetch a subset of this data over the HTTP protocol, using established Linked Data recipes, most notably the use of HTTP URIs as identifiers and entry points into data. Here are some examples of these data.europeana.eu resources:
- http://data.europeana.eu/item/92037/_http___www_bl_uk_onlinegallery_onlineex_crace_t_zoomify87870_html refers to a real-world object for which digital resources are available through Europeana (access data).
- http://data.europeana.eu/aggregation/provider/92037/_http___www_bl_uk_onlinegallery_onlineex_crace_t_zoomify87870_html links to the digital resources submitted on that object by its provider, and gives meta-information on the digital resource aggregation process, e.g., the name of the data provider (raw data).
- http://data.europeana.eu/proxy/provider/http://data.europeana.eu/aggregation/provider/92037/_http___www_bl_uk_onlinegallery_onlineex_crace_t_zoomify87870_html gives all the data that applies to the real-world object, from the perspective of the Europeana provider (raw data).
- http://data.europeana.eu/proxy/europeana/http://data.europeana.eu/aggregation/provider/92037/_http___www_bl_uk_onlinegallery_onlineex_crace_t_zoomify87870_html gives all the data that applies to the real-world object, from the perspective of Europeana. This is the resource to which Europeana semantic enrichments are attached (raw data).
- http://data.europeana.eu/aggregation/europeana/92037/_http___www_bl_uk_onlinegallery_onlineex_crace_t_zoomify87870_html links to the digital resources maintained by Europeana for the object, and gives meta-information on the data aggregation process, which is created by Europeana (raw data).
- http://data.europeana.eu/item/91622/raa_kmb_16000200000050 is an object for which the Swedish Open Cultural Heritage also provides its own Linked Open Data representation (raw data).
The data can also be fetched via the Europeana OAI-PMH Service which allows you to harvest the entirety, or a selection, of all Europeana metadata.
How can you contribute?
If you are a Europeana data provider, you don’t need to submit your data again to Europeana. Once the Data Exchange Agreement (DEA) has been signed, we just fetch the metadata Europeana has already gathered.
If you have any questions or feedback, contact us on the Europeana LOD group