This report addresses all relevant aspects of the CESSDA EQB documentation and retrieval requirements that current or future EQB Service Providers must follow to enable metadata harvesting and integration into the EQB. Archives and institutions providing their metadata to EQB, must agree to the following requirements: DDI Lifecycle or Codebook based documentation, which includes at least the mandatory elements of the EQB metadata schema harvesting via OAI-PMH or a file-based harvesting The DDI based EQB metadata schema and a preferred harvesting approach are agreed requirements to retrieve and integrate studies and survey questions into EQB. The EQB metadata schema, which is a subset of the CESSDA metadata model version 2.0, includes all relevant elements to provide user-friendly metadata documentation on the EQB platform. The elements provided in the schema, together with details on the must, should, and could requirements, definitions, used controlled vocabularies and ISO Codes as well as DDI 3.2 XPath examples, are the basis for the EQB backend and frontend components and enable a smooth transition of metadata from the SP to the EQB User Interface.