QR code types and versions supported by ES3

Hi,

we use LiveCycle ES3 Output service and templates developed with Livecycle Workbench and Designer 10 to generate PDF files.

1. What types of read-only QR codes are supported by these tools? I could not find specifics for this in the documentation. The code should be able to contain a URL, but how long it can be etc. depends on the type and max version.

2. The end users sometimes use older versions of Adobe Reader. Can any Reader version (v7 upwards) show read-only QR codes (I suppose yes, because it's only an image)?

Thanks!