Describes the location and the capabilties of an electronic system with which communications can be established for the purposes of exchanging clinical or administrative data. This class is an amalgam of data elements identified by the ONC S&I Initiatives and by FHIR. "This class captures information on a unique electronic service. It is defined to support information interchange requirements that are focused on exchanging or querying for specific information on an electronic address." - ONC S&I Clinical Element Data Dictionary (CEDD), March 2012. Electronic Service Information = "All information reasonably necessary to define an electronic destination’s ability to receive and consume a specific type of information (e.g. discharge summary, patient summary, laboratory report, query for patient/provider/healthcare data). The information should include the type of information (e.g. patient summary or query) the destination’s Electronic Address, the Messaging Framework supported (e.g. SMTP, HTTP/SOAP), Security information supported or required (e.g. digital certificate) and specific payload definitions (e.g. CCD C32 V2.5). In addition, this information may include labels which help identify the type of recipient (e.g. medical records department)." - ONC S&I Query for Electronic Service Information Including Electronic Address Use Case Initiative Glossary. "The technical details of an endpoint that can be used for electronic services, such as for web services providing XDS.b or a REST endpoint for another FHIR server. This may include any security context information." - HL7 FHIR, Endpoint