- u -

• Unbounded : dd4hep::rec::SurfaceType
• Undefined : dd4hep::Volume
• UNKNOWN : dd4hep::CartesianField , TiXmlNode
• USER : dd4hep::STD_Conditions
• USER_FLAGS_FIRST : dd4hep::Condition
• USER_FLAGS_LAST : dd4hep::Condition
• USER_NOTIFIED : dd4hep::STD_Conditions
• USER_SET : dd4hep::STD_Conditions