"2023-03-14"^^ . "1.2.4.1" . "1.1.1.0.1.2" . . . . "Internal connection"@en . "References the first topological object in an oriented relation.\nIndicates the object that corresponds to a section of line, an operational point or a track inside an operational point connected at start."@en . "stable" . "2021-04-01"^^ . "Element A"@en . . .