Value constraints with no value constraint types

When a value constraint is provided without a value constraint type, it is treated as a plain literal (unless valueNodeType is “IRI” or “BNode”). Typically, this is intended to close the set of possible values to one specific value and no others. In the following example, the value expected to be found with the property :securityLevel is “Confidential” (and no other).

propertyID	valueConstraint
:securityLevel	Confidential

This is interpreted as:

DCTAP instance
    Shape
        shapeID                  default
        Statement Template
            propertyID           :securityLevel
            valueConstraint      Confidential