HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part II

Glossary-14 EN
Symbol Set
A symbol set is a unique ordering of the characters in a font.
Each symbol set is defined with a unique set of applications in mind.
Symbol sets are created for many purposes, for example, the PC-8
symbol set was designed to support US IBM-PC applications.
Treatment
Treatment is the combination of font style and/or weight. For example,
some treatments of Times Roman font include: upright, or bold, or
italic.
Typeface
Typeface is a generic name for graphics symbols having common
design features. Each typeface has unique and distinguishing
characteristics.
UEL (Universal Exit Language) Command
The Universal Exit Language (UEL) command (?%–12345X)
causes the PCL printer language to shut down and exit. Control
is then returned to the Printer Job Language (PJL). Both PCL 5
and HP-GL/2 recognize this command.
The UEL Command has the same effect as the
?E command, and
also enters PJL Mode of operation for printers that support PJL (refer
to the section, “Universal Exit Language Command” in Chapter 4 for
more information).
Unicode
This is a grouping of symbols (a symbol index) used by TrueType
fonts. An unbound font has the capacity to be bound to a set of
symbols selected from a complementary symbol index (such as
the Unicode or MSL symbol indexes). Each symbol in the index is
identified by a unique Unicode number. Appendix D of the PCL 5
Comparison Guide contains the Unicode symbol index.