mapnik-reference 5.0.6-1 (arm64 binary) in ubuntu zesty

 mapnik-reference specifies mapnik structures, styles, symbolizers,
 and the list of their properties, in JSON format.
 It is useful for building parsers, tests, compilers, and syntax
 highlighting or syntax checking.
 .
 Mapnik is a C++/Python toolkit for developing GIS applications.
 .
 Node.js is an event-based server-side javascript engine.