The concept of ESI is not defined in Energy Interoperation. There is therefore no enforcement; configurations may bridge ESIs, but (out of scope for Energy Interoperation) the cleanest way is to place an actor at the ESI that presents the VEN role to the outside and the VTN role (if needed) to the inside. Close no action required. It is acceptable to delete line 475 and add a footnote "The SGIP I2G and B2G Domain Expert Working Groups are working on a definition of the ESI; a similar concept with the same name can be found in OpenHAN." Similarly the text near 1237 may be updated at the editor's discretion. There are no actionable or conformance items in that introductory material.