Pattern: Select empty elements CCC
/AAA/BBB/CCC line 3: Source contains an empty element CCC 
/AAA/BBB/CCC line 3: [1]An element CCC does not contain any text
/AAA/BBB/CCC line 3: [2]An element CCC does not contain any text
./test/schematron/zvon5_2.xml fails to validate