IBM 6400 Programmer's Reference

Index
variable space. A method used to assign a character
increment dimension of varying size to space
characters. The space characters are used to
distribute white space within a text line. The white
space is distributed by expanding or contracting the
dimension of the variable space character’s increment
dependent upon the amount of white space to be
distributed. See also variable space character and
variable space character increment.
variable space character. The code point assigned by
the data stream for which the character increment
varies according to the semantics and pragmatics of
the variable space function. This code point is not
presented, but its character increment parameter is
used to provide spacing. See also variable space
character increment.
variable space character increment. The variable
value associated with a variable space character.
The variable space character increment is used to
calculate the dimension from the current presentation
position to a new presentation position when a
variable space character is found. See also variable
space character.
vertical font size. (1) A characteristic value,
perpendicular to the character baseline, that
represents the size of all graphic characters in a font.
Synonymous with font height. (2) In a font character
set, nominal vertical font size is a font-designer
defined value corresponding to the nominal distance
between adjacent baselines when character rotation
is zero degrees and no external leading is used. This
distance represents the baseline-to-baseline
increment that includes the font’s maximum baseline
extent and the designer’s recommendation for
internal leading. The font designer can also define a
minimum and a maximum vertical font size to
represent the limits of scaling. (3) In font
referencing, the specified vertical font size is the
desired size of the font when the characters are
presented. If this size is different from the nominal
vertical font size specified in a font character set, the
character shapes and character metrics might need to
be scaled prior to presentation.
viewing transform. A transform that is applied to
model-space coordinates. Contrast with model
transform.
viewing window . That part of a model space that is
transformed, clipped, and moved into a graphics
presentation space.
W
white space. The portion of a line that is not
occupied by characters when the characters of all the
words that can be placed on a line and the spaces
between those words are assembled or formatted on
a line. When a line is justified, the white space is
distributed among the words, characters, or both on
the line in some specified manner. See also
controlled white space.
window. A predefined part of a graphics presentation
space. See also graphics presentation space window
and pick window.
X
X
bc
extent. The size of a bar code presentation space
in the X
bc
dimension. See also bar code presentation
space.
X
bc
,Y
bc
coordinate system. The bar code presentation
space coordinate system.
X-dimension. In bar codes, the nominal dimension of
the narrow bars and spaces in a bar code symbol.
X
g
,Y
g
coordinate system. In the IPDS architecture, the
graphics presentation space coordinate system.
216 6400 IPDS

IBM 6400 Specifications

General

Brand	IBM
Model	6400
Category	Printer
Language	English