doc/structure.yuml
[Text| Identifier; Name; DefaultLanguage][Text]++-*>[Object][Object]++-*>[Surface][Surface]++-*>[Column| Number][Text]++-*>[Milestone| Type; Name][Milestone]<>-*>[LineElement][StructureElement]^-[PhysicalStructureElement][StructureElement]^-[Milestone][PhysicalStructureElement]^-[Object][PhysicalStructureElement]^-[Surface][PhysicalStructureElement]^-[Column][PhysicalStructureElement]^-[Line][Object]^-[Tablet][Object]^-[Envelope][Object]^-[Prism][Object]^-[Bulla][Object]^-[NamedObject| Name][NamedObject]^-[Fragment][Surface]^-[Obverse][Surface]^-[Reverse][Surface]^-[Left][Surface]^-[Right][Surface]^-[NamedSurface| Name][NamedSurface]^-[Edge][NamedSurface]^-[Face][PhysicalStructureElement]++-*>[State| Qualification;Extent;Scope;State][PhysicalStructureElement]++*>[StateComment][Column]++-*>[ColumnElement][ColumnElement]^-[Line| Label][ColumnElement]^-[Ruling| Count][ColumnElement]^-[Comment][ColumnElement]^-[Image| Number; Label][ColumnElement]^-[EmptyLine][PhysicalStructureElement]++-*>[Flag][Flag]^-[Broken][Flag]^-[Collated][Flag]^-[Uncertain][Flag]^-[Remarkable]