MEF 10.4 is a standards document developed by the STA of the MEF that specifies the service attributes of E-Line, E-LAN and E-Tree.
"This document describes Service Attributes for Subscriber Ethernet Services provided to an Ethernet Subscriber by an Ethernet Service Provider. The Service Attributes describe behaviors observable at an Ethernet User Network Interface and from Ethernet User Network Interface to Ethernet User Network Interface. In addition, a framework for defining specific instances of Subscriber Ethernet Services is described. Finally, extensive examples and explanatory material is included in appendices.
This document supersedes and replaces MEF 10.3, Ethernet Services Attributes Phase 3, MEF 10.3.1, Composite Performance Metric (CPM) Amendment to MEF 10.3, and MEF 10.3.2, Amendment to MEF 10.3 - UNI Resiliency Enhancement."