Node and Link Styling

Styling properties of nodes and links allow for fine-grain control of the way nodes and links are displayed, including coloring, size, representative images, and text labels.

Node Description Expression

Allows custom descriptions to be assigned to each node. The description expression is evaluated for each row of the data table generated by the Node Expression and must return a string.

Node Description Expression Resolution Environment:
Default Data Table	Result of Node Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: nodeDescriptionExpression

Property type: String

Link Description Expression

Allows custom descriptions to be assigned to each link. The description expression is evaluated for each row of the data table generated by the Link Expression and must return a string.

Link Description Expression Resolution Environment:
Default Data Table	Result of Link Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: linkDescriptionExpression

Property type: String

Second Description Expression

Applicable when the Link Type is set to two-directed-line. Applies a description to the second part of the link. The second description expression is evaluated for each row of the data table generated by the Link Expression and must return a string.

Second Description Expression Resolution Environment:
Default Data Table	Result of Link Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: secondDescriptionExpression

Property type: String

Image Expression

Defines an image to represent each node. The expression is evaluated for every row of the data table returned by the Node Expression and must return a data block of an SVG image.

Image Expression Resolution Environment:
Default Data Table	Result of Node Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: imageExpression

Property type: String

Node Width Expression

Defines the width in pixels of each node. The expression is evaluated for every row of the data table returned by the Node Expression and must return an integer value.

Property name: nodeWidthExpression

Property type: String

Node Width Expression Resolution Environment:
Default Data Table	Result of Node Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Link Width Expression

Defines the width in pixels of links. The expression is evaluated for every row of the data table returned by the Link Expression and must return an integer value.

Link Width Expression Resolution Environment:
Default Data Table	Result of Link Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: linkWidthExpression

Property type: String

Node Description Font Size

Defines the font size in pixels for the Description of each node. The expression is evaluated for every row of the data table returned by the Node Expression and must return an integer value.

Node Description Font Size Expression Resolution Environment:
Default Data Table	Result of Link Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: nodeFontSizeExpression

Property type: String

Link Description Font Size

Defines the font size in pixels for the Description and Second Description of each link. The expression is evaluated for every row of the data table returned by the Link Expression and must return an integer value.

Link Description Font Size Expression Resolution Environment:
Default Data Table	Result of Link Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: linkFontSizeExpression

Property type: String

Node Description Color Expression

Defines the text color for the Description associated with a node. The expression is evaluated for every row of the data table returned by the Node Expression and must return either a standard HTML color value as text, or a color value as returned by the color() Expression language function.

Node Description Color Expression Resolution Environment:
Default Data Table	Result of Node Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: nodeDescriptionColorExpression

Property type: String

Link Description Color Expression

Defines the text color for the Description and Second Description associated with a link. The expression is evaluated for every row of the data table returned by the Link Expression and must return either a standard HTML color value as text, or a color value as returned by the color() Expression language function.

Link Description Color Expression Resolution Environment:
Default Data Table	Result of Link Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: linkDescriptionColorExpression

Property type: String

Node Color Expression

Defines the color of a node. The expression is evaluated for every row of the data table returned by the Node Expression and must return either a standard HTML color value as text, or a color value as returned by the color() Expression language function. Color value is ignored if a custom image is assigned to the node.

Node Color Expression Resolution Environment:
Default Data Table	Result of Node Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: nodeColorExpression

Property type: String

Link Color Expression

Defines the color of a link. The expression is evaluated for every row of the data table returned by the Link Expression and must return either a standard HTML color value as text, or a color value as returned by the color() Expression language function.

Link Color Expression Resolution Environment:
Default Data Table	Result of Node Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: linkColorExpression

Property type: String

Second Link Color Expression

Applicable when the Link Type is set to two-directed-line. Defines the color of the second link. The expression is evaluated for every row of the data table returned by the Link Expression and must return either a standard HTML color value as text, or a color value as returned by the color() Expression language function.

Second Link Color Expression Resolution Environment:
Default Data Table	Result of Link Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: secondLinkColorExpression

Property type: String

Second Link Width Expression

Applicable when the Link Type is set to two-directed-line. Defines the width in pixels of the second link. The expression is evaluated for every row of the data table returned by the Link Expression and must return an integer.

Second Link Width Expression Resolution Environment:
Default Data Table	Result of Link Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: secondLinkWidthExpression

Property type: String

Node Update Period

Update period for nodes. These values define the interval of time between each instance of node-related data being read from the server.

Variable Name:	nodeUpdatePeriod
Records:	1
Permissions:	Readable at Observer permission level, writable at Manager permission level

Record Format:

Field Name	Field Type	Notes
nodeUpdatePeriod	Long	Displayed in the user interface as a unit of time.

Link Update Period

Update period for links. These values define the interval of time between each instance of link-related data being read from the server.

Variable Name:	linkUpdatePeriod,
Records:	1
Permissions:	Readable at Observer permission level, writable at Manager permission level

Record Format:

Field Name	Field Type	Notes
linkUpdatePeriod	Long	Displayed in the user interface as a unit of time.

Description Position Expression

Defines the relative positioning of each node description to its node. The expression is evaluated for every row of the data table returned by the Node Expression and must return one of the following values:

top
bottom
left
right

Description Position Expression Resolution Environment:
Default Data Table	Result of Node Expression.
Default Context	None.
Default Row	Currently processed row of the default table.
Environment Variables	Standard variables only.

Property name: nodeDescriptionPositionExpression

Property type: String

Azimuth Expression

Defines a rotation value to be applied to the original orientation of each node's image. The expression is evaluated for every row of the data table returned by the Node Expression and must return a rotation angle in radians.

Default Context	None
Default Data Table	Result of Node Expression
Default Row	Points to currently processed row of the default data table
Environment Variables	Standard variables only.

Property name: azimuthExpression

Property type: String

Directed Expression

Defines whether a link is directed or undirected. A directed link will be rendered with an arrow indicating the direction from the source node to the target node. An undirected links will be rendered without an arrow. The expression is evaluated for every row of the data table returned by the Link Expression and must return a Boolean value.

Default Context	None
Default Data Table	Result of Link Expression
Default Row	Points to currently processed row of the default data table
Environment Variables	Standard variables only.

Property name: directedExpression

Property type: String

DPF_EXPORT_V5.8.8 / TIME_1743710564 / 2025-04-03 20:02:44 / STRLEN_36558 / STRLEN_HTML_34828

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