Generation of SVG file

Scalable Vector Graphics

SVG is a graphical format which is scalable. It means that when you zoom an image, you don't lose quality. So this format gives good printing result.

You can enable SVG generation by using -tsvg flag with the command line.

You can also use format="svg" in the Ant task definition.

<target name="main">
  <plantuml dir="./src" format="svg" />
</target>

You can also generate SVG directly from Java.

Specific SkinParameter for SVG

svgLinkTarget

You can change the target value in the generated SVG with the svgLinkTarget setting.

According to the HTML specification, you can choose:

_blank
_parent
_self
_top (by default, if svgLinkTarget is empty)

@startuml
skinparam svgLinkTarget _parent
start
:[[http://plantuml.com]];
stop
@enduml

pathHoverColor

There is also a setting skinparam pathHoverColor to specify a color change when the mouse pointer goes hover some links.

@startuml
skinparam pathHoverColor green
class Foo2 [[http://www.yahoo.com/Foo2]] {
  +double[] x
  +double y
}
Foo2 --> Foo3
@enduml

[Ref. QA-5453]

svgDimensionStyle

If you does not want to have the attribut style, width and height on the header of the SVG output, you can set skinparam svgDimensionStyle false.

@startuml
skinparam svgDimensionStyle false

component a {
}
component b {
}
a -(0- b
@enduml

[Ref. QA-7334]

Specific Pragma for SVG

svgSize

This directive !pragma svgSize <U+hhhhh> XX tells to PlantUML: "assume that the size of <U+hhhhh> is the same as 'XX' "

You can play with this directive:

!pragma svgSize <U+hhhhh> XX
!pragma svgSize <U+hhhhh> I

to find the best setting.

@startuml
!pragma svgSize <U+1F610> XX

test: text <U+1F610>
test_size45: text <size:45><U+1F610>
@enduml

You can use the -P command-line option to specify the pragma.

Put it in quotes because the value includes spaces.
You can use it multiple times. Example:

java -jar plantuml.jar "-PsvgSize=<U+1F610> XX" "-PsvgSize=<U+1F611> I"

[Refs. QA-12550, issue-582]