Header for reader device data. Data for the following devices may be returned within this header: local and remote and internal readers. Total length of the data for a device is accounted for by the prefix section which follows this header structure. The prefix section will also identify the type of data returned in this header. For reader devices the data (section) type is JDTYRDR. The following sections could be returned within this header:

• Prefix section (always first) Common prefix section (JDCXPREF)
• Reader common section Reader common section (JDRCRDR)
• Reader JES2 section Reader JES2 section (JDR2RDR)
• Reader JES3 section Reader JES3 section (JDR3RDR)
• Job information section Common sections