POSTSCRIPT

•Illegal characters adjacent to legal characters. If there is no white space character (as defined in the PostScript Language Reference Manual, second edition) between the illegal character or characters and legal PostScript characters, then that combination can be redefined to be the legal PostScript substring only, as shown in these examples:

(showpage\004) cvn {showpage} def (sp\004) cvn {sp} def

Note: It is not desirable to redefine a legal substring ABC as some other legal substring XYZ in the illegal token initialization file. For instance, although showpage frequently is redefined by PostScript code to be sp for brevity, it may seem to make sense to redefine sp <control D> as showpage. However, if the client application creating the PostScript defines sp to mean show rather than showpage, then to have sp <control D> initialized to mean showpage is an error.

Also, due to case sensitivity, some patterns may have to appear with the same case variety as in the PostScript jobs to be processed.

Because there may be an infinite number of character combinations, the system administrator is encouraged to redefine only known or suspect problem tokens.

Multiple jobs in one input file

Note that the above control-D handling does not perform true PostScript job encapsulation. Therefore, the following PostScript job situations may cause problems. All of these problems are due to having multiple PostScript jobs in one input file. If problems occur, break the concatenated masters into separate input files.

•Because control-Ds are not interpreted as end-of-job (EOJ), PostScript virtual memory (VM) is not restored before the next job. This means that the next job environment is not “clean,” which may or may not cause problems. PostScript VM may also run out since VM is not restored by control-D. Note that all Xerox PostScript products do restore VM at the end of their input file, so single PostScript jobs per input file are always handled correctly.

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Some of the PostScript jobs execute exitserver, which stays in effect until EOJ. Because the control-Ds are not interpreted as EOJ, subsequent non-exitserver job definitions become permanent, which could consume all of the PostScript VM or cause other PostScript problems.

A job executes code that flushes the input data up to EOJ. Because the control-D is not interpreted as EOJ, it does not stop the flushing. Therefore, the rest of the PostScript jobs in the input file are ignored.

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XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

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Xerox 721P87491 manual Multiple jobs in one input file
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721P87491 specifications

The Xerox 721P87491 is a remarkable printing device that showcases advanced technology tailored for professional environments, ensuring high-quality output and efficiency. Aimed at meeting the demands of busy offices, this model is recognized for its reliability and innovative features.

At the core of the Xerox 721P87491's appeal is its robust printing capabilities. It offers an impressive resolution, enabling the production of crisp and clear documents, whether in black and white or color. This high-resolution output is particularly essential for businesses that require detailed graphics, intricate charts, or professional-grade presentations.

One of the standout features of the Xerox 721P87491 is its impressive speed. It is designed to handle high-volume printing, significantly enhancing productivity in fast-paced work environments. With a rapid print speed per minute, users can expect swift processing of print jobs, ensuring that document delivery times are minimized.

The device also boasts advanced connectivity options. It supports both wired and wireless connections, allowing for seamless integration into a variety of office networks. This flexibility facilitates printing from multiple devices, including desktop computers, laptops, and mobile devices, enhancing overall workflow and collaboration within teams.

Additionally, the Xerox 721P87491 incorporates user-friendly interface options. With an intuitive touchscreen display, navigating the printer's functions becomes simpler. Users can easily access common features, adjust settings, and manage print jobs efficiently.

Another notable characteristic is its advanced security features. Given today's emphasis on data protection, the Xerox 721P87491 is equipped with robust security protocols to safeguard sensitive documents. It includes features like secure print, which holds documents until the authorized user enters a PIN, ensuring confidentiality in high-stakes environments.

Moreover, the Xerox 721P87491 demonstrates an emphasis on environmental sustainability. It is designed to be energy efficient, reducing power consumption during both idle and active states. The printer also supports duplex printing, which helps decrease paper use, contributing to a more sustainable office practice.

In summary, the Xerox 721P87491 is a versatile printing solution that merges efficiency, quality, and advanced technology. With high-speed printing, intuitive controls, robust security features, and a commitment to sustainability, it stands out as an excellent choice for businesses aiming to boost productivity while maintaining high standards. Its capabilities make it a worthy investment for any modern office environment.
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