Install librelaxngcc-java by entering the following commands in the terminal:
sudo apt update sudo apt install librelaxngcc-java
Description:
RELAX NG Compiler Compiler
RelaxNGCC is a tool for generating Java source code from a given RELAX NG grammar. By embedding code fragments in the grammar like yacc or JavaCC, you can take appropriate actions while parsing valid XML documents against the grammar.
Homepage: http://relaxngcc.sourceforge.net
Version: 1.12-1
Section: universe/java