Install libmvel-java-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libmvel-java-doc
expression language for Java-based applications - Javadoc
MVEL may be useful as an extension to anything from use in JSP Tag Libraries, to the configuration facilities of your library/framework. . In addition to being an expression language, MVEL also comes packaged with an templating system similar to Velocity and FreeMarker. . This package provides the API documentation for libmvel-java.