Xerox 721P88200 - Manual (Page 26)

AFP SUMMARY
2-4 IPS SOLUTIONS GUIDE
AFP architecture
The AFP system is a sub-architecture of the Systems Application
Architecture (SAA). The AFP print platform consists of architected
data streams for three areas: applications, print resources, and
printers. This structure provides the foundation for keeping the
applications independent from specific printer hardware
requirements. This independence helps to reduce the cost of
application development and maintenance.
Like other SAA architectures, AFP and Intelligent Print Data Streams
(IPDS) are components of IBM’s Open Blueprint architecture. As the
successor to SAA, Open Blueprint is a truly open architecture that
helps IBM and others deliver integrated, interoperable products and
solutions.
AFP combines the data types (resources) described previously to
create data streams. This section describes the architectures and
data streams as recognized by the DocuPrint IPS printers.
Object Content Architectures
Documents are made up of different kinds of data, such as text,
graphics, images, and bar codes. Object Content Architectures
(OCAs) describe the structure and content of each type of data
format that exists in a document and appears in a data stream.
The object content architectures, also known as transmission
objects, are:
•
Bar Code Object Content Architecture (BCOCA), which
describes a predetermined pattern of bars and spaces, known
as bar codes, that represent alphanumeric data in a machine-
readable format.
•
Formatted Data Object Content Architecture (FD:OCA), which
allows you to interchange data that has already been formatted.
•
Font Object Content Architecture (FOCA), which describes the
structure and contents of fonts. It also allows you to interchange
the font descriptions and specify color.
• Graphics Object Content Architecture (GOCA), which describes
vector or object-oriented graphics. It also allows you to
interchange and present graphics data and specify color.
• Image Object Content Architecture (IOCA), which describes
bitmapped image objects, including data compression, gray-
scale, encoding, and other recording data. It also allows you to
interchange and present images.
•
Presentation Text Object Content Architecture (PTOCA), which
describes text objects formatted for all-points addressable
presentations, including font, text color, and other visual
attributes. It also allows you to interchange and present
presentation text data, lines, and boxes.