Constraints are grouped into what are called Property Shapes that describe all constraints to be applied to a particular "path" through the graph data.

The path is displayed according to the following syntax:

Forward Slash /

Represents a sequential path.

Vertical Bar |

Represents an alternative path.

Caret ^

Represents an inverse path.

Asterisk *

Represents a path to be followed zero or more times.

Plus +

Represents a path to be followed one or more times.

Question Mark ?

Represents a path to be followed zero or one time.