Understanding vector layer type default fields

When you create a new vector layer, it automatically contains a set of default fields that Focus maintains. You can modify definitions of some default fields; however, most are restricted by the system. The following table lists the fields maintained by Focus.

Table 1. Default Fields
Field Name	Description	Layer Type
REPCode	Contains the key to define the appearance of the shapes according to the Representation Editor.	Unstructured
Angle	Controls the slant of the text string or point. Measured in radians by default, but you can change it to display in degrees, gradians, or mils.	Point Unstructured
TextString	Defines the field to accept characters, such as text. You can type directly on the layer or in the TextString field.	Point Unstructured
GroupID	Identifies a set of shapes that you grouped together. The identification number is generated by Focus and cannot be changed.	Point Line Unstructured Whole Polygon
Area	Displays the computed area enclosed by the polygon.	Whole Polygon Topological Polygon
Perimeter	Displays the computed circumference of the polygon.	Whole Polygon Topological Polygon
ArcIdList	Identifies the lines that compose a polygon in a topological layer.	Topological Polygon
RightAreaId	Identifies the polygon on a topological layer which is on the right of the line.	Topological Line
LeftAreaId	Identifies the polygon on a topological layer which is on the left of the line.	Topological Line
StartNodeId	Identifies the point (node) that begins a topological line.	Topological Line
EndNodeId	Identifies the point (node) that ends a topological line.	Topological Line
Length	Displays the computed distance covered by the line.	Line Topological Line

To view all the default fields for the layer:

From the Field menu in the Attribute Manager, click Show All.