The barcode object supplies the information required to display a barcode. This information includes the type of barcode and a set of options that varies from one type of barcode to another.LiveCycle Designer ES can support two types of barcodes: hardware and software. However, an XFA application is not required to support any particular set of barcodes. Hardware barcodes are displayed by particular printers. The set of supported barcodes may vary depending on the display device, because some printers have built-in support for particular barcodes. Software barcodes are drawn stroke by stroke by the XFA application itself. When displaying on a screen, which is not accessible to barcode readers, an XFA application may also revert to displaying just a placeholder rather than an accurate barcode.For each type of barcode there are usually two separate specifications, one for the barcode itself and one for the barcode’s placement in relation to the physical page and to surrounding printed matter. The creator of the form design is responsible for ensuring that the barcode is placed correctly on the page. The XFA application is responsible for correctly rendering the barcode using the user data. The user data must be compatible with the barcode; that is, it must conform to the allowed character set and string length.