Xerox DocuPrint 180 Solution Manual page 27

IPS SOLUTIONS GUIDE
Data streams
Data streams define the structure and content of an application.
Three types of data streams used by AFP are:
•
Mixed Object Document Content Architecture (MO:DCA) data
streams, which are generated by an application and are device
independent. These data streams describe documents and
object envelopes for interchange with other applications and
application services.
•
Intelligent Printer Data Stream (IPDS), which is a device-bound
data stream that has been processed into printer-specific data,
normally by PSF. This is the native language of DocuPrint IPS
printers. These data streams perform printer control functions
and share job status information.
•
Advanced Function Presentation Data Stream (AFPDS), which
is an architected presentation function set of MO:DCA. Also
known as MO:DCA-Presentation (MO:DCA-P), it consists of
data objects and data structures that define a document's
layout.
While there are other data streams associated with AFP documents,
you will use the MO:DCA and IPDS data streams most frequently
when printing to DocuPrint IPS printers. You can also print AFPDS to
DocuPrint IPS printers, but the data stream must be converted to
IPDS before being submitted.
Data towers
What makes a printer an IPDS printer? IPDS printers have these
features:
•
implementation of a subset of the Device Control command set
•
implementation of one or more of these IPDS command sets
and their corresponding "tower"
— PT1, PT2, and PT3 (text)
— IM/1 (uncompressed images)
— IO/1 (compressed images)
— DR/1 and DR/2 (graphics)
— BC/1 (bar codes)
•
generation of IPDS exceptions according to a set of predefined
IPDS rules
The DocuPrint IPS printers are compliant with the PSF data towers.
For more information on the data and resource towers implemented
in IPS, refer to "Object Content Architectures" on page 2-4.
AFP SUMMARY
2-5