Attribute properties

Each data point of an attribute is associated with a unique VTQ identifier (Value, Time, and Quality). Only the value can be modified, provided that the attribute is user-writable. When value is modified, a new VTQ is generated.

When you try to modify an attribute value, a dialog box appears that shows the type (datatype) and current value of the attribute. Use this information as a guide for continuing.

Before modifying an attribute value, check its category shown in the Category column to determine whether modification is possible.