Usage Policies for Fragmented Digital Product Passport Data Retrieval in AECO Data Spaces

Decentralized digital product passports (DPPs) retrieval via data spaces are emerging as a promising approach to enable material reuse in the Architecture, Engineering, Construction, and Operations (AECO) industry. Yet, no DPP-specific operational data space currently exists, and usage policy implementation remains unexplored. Building on Eclipse, this paper develops a proof-of-concept DPP data space, implementing asset registration, usage policy definition, contract negotiation, and authenticated data retrieval. Demonstrated through a suspended ceiling element, the research shows how multiple data providers can offer modular DPP data under differentiated usage policies, offering the first technical validation for decentralized DPP exchange in the AECO industry.