<dependency>
  <groupId>com.github.librepdf</groupId>
  <artifactId>openrtf</artifactId>
  <version>1.2.1</version>
</dependency>

implementation 'com.github.librepdf:openrtf:1.2.1'

implementation("com.github.librepdf:openrtf:1.2.1")

libraryDependencies += "com.github.librepdf" % "openrtf" % "1.2.1"

@Grapes(
  @Grab(group='com.github.librepdf', module='openrtf', version='1.2.1')
)

<dependency org="com.github.librepdf" name="openrtf" rev="1.2.1" />

[com.github.librepdf/openrtf "1.2.1"]

'com.github.librepdf:openrtf:jar:1.2.1'