L0 = <http://www.simantics.org/Layer0-1.1>
G2D = <http://www.simantics.org/G2D-1.1>
DIA = <http://www.simantics.org/Diagram-2.2>

//// Diagram-specific settings

DIA.HasPageDescription <R L0.HasProperty : L0.FunctionalRelation
    --> DIA.PageDescription

DIA.PageDescription <T L0.Property
    @L0.singleProperty DIA.PageDescription.Size
    @L0.singleProperty DIA.PageDescription.Orientation
    @L0.singleProperty DIA.PageDescription.Margins
    >-- DIA.PageDescription.Size --> G2D.Point2D <R L0.HasProperty : L0.FunctionalRelation
        L0.HasLabel "Page Size"
    >-- DIA.PageDescription.Orientation --> DIA.Orientation <R L0.IsRelatedTo : L0.FunctionalRelation
        L0.HasLabel "Page Orientation"
    >-- DIA.PageDescription.Margins --> DIA.Margins <R L0.HasProperty : L0.FunctionalRelation
        L0.HasLabel "Margins"

DIA.Orientation <T L0.Value
    @L0.tag L0.Enumeration
DIA.Orientation.Portrait : DIA.Orientation
DIA.Orientation.Landscape : DIA.Orientation

DIA.Margins <T L0.Value
    @L0.singleProperty DIA.PageDescription.Margins.Top
    @L0.singleProperty DIA.PageDescription.Margins.Bottom
    @L0.singleProperty DIA.PageDescription.Margins.Left
    @L0.singleProperty DIA.PageDescription.Margins.Right
    >-- DIA.PageDescription.Margins.Top --> L0.Double <R L0.HasProperty : L0.FunctionalRelation
        L0.HasLabel "Top Margin"
    >-- DIA.PageDescription.Margins.Bottom --> L0.Double <R L0.HasProperty : L0.FunctionalRelation
        L0.HasLabel "Bottom Margin"
    >-- DIA.PageDescription.Margins.Left --> L0.Double <R L0.HasProperty : L0.FunctionalRelation
        L0.HasLabel "Left Margin"
    >-- DIA.PageDescription.Margins.Right --> L0.Double <R L0.HasProperty : L0.FunctionalRelation
        L0.HasLabel "Right Margin"

DIA.DisplayPageSize
    @L0.defTag 

DIA.DisplayMargins
    @L0.defTag

DIA.DisplayGrid
    @L0.defTag 

DIA.DisplayRuler
    @L0.defTag 

DIA.HasGridSize <R L0.HasProperty : L0.FunctionalRelation
    L0.HasLabel "Grid Size"
    --> L0.Double

DIA.NavigationEnabled <R L0.HasProperty
    L0.HasDescription "Boolean value indicating if navigation is enabled or not. Default is true."
    --> L0.Boolean

//// Diagram editor state properties

DIA.HasEditorState <R L0.HasProperty : L0.FunctionalRelation
    <-- DIA.Diagram
    --> DIA.EditorState <T L0.Property
        >-- DIA.EditorState.ViewTransform --> G2D.Transform <R L0.HasProperty : L0.FunctionalRelation
            L0.HasDescription "For storing the current view transformation of a diagram editor." 
        >-- DIA.EditorState.Selection --> DIA.Element <R L0.IsRelatedTo
            L0.HasDescription "For storing the current selection of elements in a diagram editor." 
        >-- DIA.EditorState.ToolMode --> L0.String <R L0.IsRelatedTo : L0.FunctionalRelation
            L0.HasDescription "For storing the current tool mode of the diagram editor."