Nodes and links have a set of system-defined attributes. These are related to the visual representation of the graph. Listed below are all the system-defined attributes and their descriptions.
**Node System Attributes **
| Attr | Description |
|---|---|
| _x | x position of the node in 3D space. Center of screen x=0. Negative values go to the left and positive values go to the right. |
| _y | y position of the node in 3D space. Center of screen y=0. Negative values go to the bottom and positive values go to the top. |
| _z | z position of the node in 3D space. Center of screen z=0. Negative values go into the screen. Positive values go toward the camera and can even go behind the camera. |
| _r | Red color of the node, can be a floating point value between 0 and 1. |
| _g | Green color of the node, can be a floating point value between 0 and 1. |
| _b | Blue color of the node, can be a floating point value between 0 and 1. |
| _radius | Radius of the node. If the radius is set to 0 or negative, the node will not be shown. |
| _text | Label of the node. Can be any string value. If _text is set to "" (empty string) then no label is shown |
**Link System Attributes **
| Attr | Description |
|---|---|
| _r | Red color of the link, can be a floating point value between 0 and 1 |
| _g | Green color of the link, can be a floating point value between 0 and 1 |
| _b | Blue color of the link, can be a floating point value between 0 and 1 |
| _width | Width of the link. If width is set to 0 or negative, the links will not be shown. |
| _text | Label of the link. Will be located at the halfway point of the link. No current way to move the position. |