Joined up Thinking: Aggregating archaeological datasets at an international scale

The archaeological research community was an early adopter of digital tools for data acquisition, organisation, analysis, and presentation of research results of individual projects. However, the provision of e-infrastructure and services for data sharing, discovery, access, and reuse has lagged behind. The ARIADNE Research Infrastructure has sought to address this situation. Developed with European funding, ARIADNE has created an e-infrastructure that enables data providers to register and provide access to their digital resources through the ARIADNE data portal, facilitating discovery, access, and research. ARIADNE has aggregated resources from over 45 data providers, spanning over 40 countries and 4 continents. The portal now provides online access to over 3.9 million research resources. It is based upon Linked Open Data technologies and is underpinned by a flexible and extensible architecture, enabling multiple combinations and presentations of the same underpinning data. We have been keen not to 'make a great heap' of all the data and, learning from previous data aggregation projects, we have defined a subset of the CIDOC CRM to be used as a strict ontology and paid close attention to data standards and controlled vocabularies to achieve a high degree of interoperability. This article discusses some of the challenges of large-scale data integration and describes the approaches adopted to ensure that the ARIADNE Knowledge Base is an effective tool for archaeological heritage management and research at a national and international level.