It has been a long time since the last update of PL-jrxml2pdf. In the meantime i received several smaller bugs and enhancement-requests, which are maybe worth a new release of PL-jrxml2pdf.
In addition, Anton Scheffer announced his package AS_barcode, which provides PL/SQL-support for generating various types of barcodes. The package is currently in a beta-state.
Based on that package i integrated support for the barcode-element into PL-jrxml2pdf.
Here's an example how this looks at the moment.
I'll publish a new release as soon as the feature is stable.