The srcML format is an XML representation for source code, where
the markup tags identify elements of the abstract syntax for
the language.  The srcml program is a command-line application
for the conversion of source code to srcML, an interface for the
exploration, analysis, and manipulation of source code in this form,
and the conversion of srcML back to source code.  The current parsing
technologies support C, C++, C#, Objective-C, Java, and Python.

zulu-openjdk17 in dependencies is to state the need for JDK for a
successful build, but specific version and variant can differ.
jdk8, openjdk8, zulu-openjdk8, or their newer versions should work the
same.  It's for building and running antlr2, which is old.