Updated README

Author: pborissow

README.md

@@ -46,4 +46,18 @@ lastUpdate fields in the model are automatically assigned a trigger in the datab
 
 
 ## Dependencies
-Requires Java 8 for javascript parsing. Also requires javaxt-core.jar
+The javaxt-orm library requires Java 8 or higher for Javascript parsing and javaxt-core.jar for JSON and basic file IO.
+
+
+## Generated Code Dependencies
+The javaxt-orm library generates Java code that extends/implements javaxt.sql.Model class. 
+It also calls java.util.Map.ofEntries which was introduced in Java 9. 
+Therefore, you will need both javaxt-core and Java 9 (or higher) to use the generated code
+in your project.
+
+
+## How to Use With Java 15 and Up
+The javaxt-orm library relies on Nashorn for parsing input Javascript files.
+Nashorn used to be bundled with Java between versions 8 to 14. Unfortunately, starting with Java 15
+Nashorn is no longer included in the standard distribution and needs to be downloaded as a seperate JAR via OpenJDK.
+More info <a href="https://gist.github.com/pborissow/a1d8a7721d131b773235cca88dc0b88c">here</a>.