$ sudo apt-get update
$ sudo apt-get install libcastor-xml-schema-java 

libcastor-xml-schema-java is installed in your system.

Make ensure the libcastor-xml-schema-java package were installed using the commands given below,

$ sudo dpkg-query -l | grep libcastor-xml-schema-java *

You will get with libcastor-xml-schema-java package name, version, architecture and description in a table

libcastor-xml-schema-java package basic information: