Verisav Semantic Vocabularies: DPP, RMA, WTY

Three complementary RDF/OWL vocabularies for standardizing after-sales service data: DPP (Digital Product Passport) for product lifecycle and compliance with EU regulations (ESPR EU 2024/1781), RMA (Return Merchandise Authorization) for return and service ticket workflows, and WTY (Warranty & Contracts) for machine-readable warranties and payment automation. All vocabularies are validated on LOV (Linked Open Vocabularies) and published with W3ID persistent URIs managed by W3C.