I found this website (where? A link from here: https://github.com/oracle-samples/oracle-db-examples/tree/main/sqldeveloper/extension/xml)
Oracle SQL Developer Exchange (0 Bytes)How maintained or how active is this site?
The examples for Reports (important for em) are from 2006-2008 - can they be used also today (R11 - R19)? The Snippets can not be reached, the Tips&Tricks are from 2006-2009.
For me the site looks great, but (too?) old.