The Dataspace Protocol standard is a set of specifications designed to facilitate interoperable data sharing between entities governed by usage control and based on Web technologies. These specifications define the schemas and protocols required for entities to publish data, negotiate Agreements, and access data as part of a federation of technical systems termed a Dataspace. The Dataspace Protocol specification is organized into the following documents: * Dataspace Model and Dataspace Terminology documents that define key terms. * Common Functionalities and their Binding in HTTPS declares cross-cutting functions as, e.g., the declaration of supported versions of this Dataspace Protocol. * Catalog Protocol and Catalog HTTPS Binding documents that define how DCAT Catalogs are published and accessed as HTTPS endpoints respectively. * Contract Negotiation Protocol and Contract Negotiation HTTPS Binding documents that define how Contract Negotiations are conducted and requested via HTTPS endpoints. * Transfer Process Protocol and Transfer Process HTTPS Binding documents that define how Transfer Processes using a given data transfer protocol are governed via HTTPS endpoints. This specification does not cover the data transfer process as such.