Information Technology - Processing Languages - Standard Page Description Language (SPDL)

.1 This International Standard defines a language for the specification of electronic documents, comprised of black and white, gray scale, or full color text, images, and geometric graphics, in a form suitable for presentation (printing or displaying on other suitable media).

This International Standard is intended to be extensible in order to accommodate future developments in imaging technology.

This International Standard is intended to be used in a variety of configurations meeting a variety of connectivity needs. It is specifically compatible with use over OSI networks.

In addition to specifying how document images are represented, this International Standard specifies how Document Production Instructions affect document presentation.

1.2 Field of Application

This International Standard is intended for use in a wide variety of printing and publishing environments, including:

- electronic publishing; - office systems; - information networks; - demand printing.

Documents conforming to this International Standard are termed SPDL documents. SPDL documents may be: - interchanged; - processed by locally connected presentation devices; - sent to presentation devices connected to OSI or non-OSI networks; - stored for presentation at a later time.

1.3 Relationship to Other Standards

The encoding of the document structure of documents conforming to this International Standard conforms to ISO/IEC 8824 and ISO/IEC 8825 if the binary encoding is used or to ISO/IEC 8879 if the clear text encoding is used.

This International Standard provides a detailed specification of the effect produced when a font resource conforming to the architecture of ISO/IEC 9541 is used in the presentation of character text. Structured Names as used in this International Standard for glyph identification are as defined in ISO/IEC 9541-2 and ISO/IEC 9070.

This International Standard provides a straightforward and efficient way of representing documents which are generated for printing by ODA systems. It also provides a capability of representing documents generated by SGML applications whose formatting is described by ISO/IEC 10179.

This International Standard provides for the efficient implementation of Print Services conforming to ISO/IEC 10175 which incorporate an SPDL Presentation Process for document presentation. This International Standard also specifies the specific semantics of applicable Document Production Instructions.