the space character and is defined differently for fonts
with different spacing characteristics.
vFor fixed-pitch, uniform character increment fonts: the
fixed character increment, which is also the space
character increment.
vFor PSM fonts: the width of the space character.
vFor typographic, proportionally-spaced fonts: 1/3 of
the vertical font size, which is also the default size of
the space character
The font designer can also define a minimum and a
maximum horizontal font size to represent the limits of
scaling. (3) In font referencing, the specified font width
is the desired size of the font when the characters are
presented. If this size if different from the nominal
horizontal font size specified in a font character set, the
character shapes and character metrics might need to
be scaled prior to presentation.
form. Adivision of the physical medium; multiple forms
can exist on a physical medium. For example, a roll of
paper might be divided by a printer into rectangular
pieces of paper,each representing a form. Envelopes
are an example of a physical medium that comprises
only one form. The IPDS architecture defines four types
of forms: cut-sheets, continuous forms, envelopes, and
computer output on microfilm. Each type of form has a
top edge.A form has two sides, a front side and a back
side. Synonymous with sheet.
form definition. Aresource used by PSF that defines
the characteristics of the form that includes overlays to
be used (if any), paper source (for cut-sheet printers),
duplex printing, text suppression, the position of
composed-text data on the form, and the number and
modifications of a page.
format. (1) The shape, size, and general makeup of a
printed document. (2) Toprepare a document for
printing. (3) The arrangement of text on the page.
forms control buffer (FCB). Abuffer for controlling
the vertical format of printed output. The forms control
buffer is a line-printer control that is similar to the
punched-paper,carriage-control tape used on IBM 1403
printers. OnAFP page printers, the forms control buffer
is replaced by the page definition. See page definition..
forms flash. In the 3800, a printer function that prints
photographic images with variable text data that is
composed into pages. The printer operator must insert a
frame containing a photographic negative into the
printer to use the forms-flash function.
fully described font. In the IPDS architecture, an
LF1-type raster font containing font metrics, descriptive
information, and the raster representation of character
shapes, for a specific graphic character set.A fully
described font can be downloaded to the printer using
the Load Font Control and Load Font commands.
Synonym for raster font. See downloaded fully
described fonts and resident fully described fonts.
G
GCSGID. See graphic character set global identifier.
GDDM. See Graphical Data Display Manager.
global resource identifier (GRID). An 8-byte identifier
used to identify an external name of a font, or,in
AS/400, to identify fonts used in text.A GRID, which
identifies a character-set and code-page combination,
consists of the GCSGID, CPGID, FGID, and font width.
GOCA. See Graphics Object Content Architecture.
graphic character. Avisual representation of a
character,other than a control character, that is
normally produced by writing, printing, or displaying. (T)
graphic character set global identifier (GCSGID).
(1)A unique value that identifies the list of graphic
character identifiers included in a component. (2) See
alsocode page global identifier.
Graphical Data Display Manager. Aseries of IBM
programs that can create, among other functions,
device-independent visual data such as page segments
and send it to devices such as displays, plotters,
printers, and personal computers.
Graphics Object Content Architecture (GOCA). An
architected collection of constructs used to interchange
and present graphics data.
gray-scale image. The ability to print an image in
shades of gray as well as in black.
GRID. See global resource identifier.
guaranteed print labeling. Amethod of print labeling
that ensures the integrity of the identification label by
preventing the user from writing over the label. If
attempts are made to override print labeling, processing
of the print file is terminated, and an audit record is
written.
group 3. Aterm used in VM-specific environments to
define channel-attached high-end printers such as the
3825, 3827, 3828, 3829, 3835-1, 3835-2, and 3900-1.
Group 3 printers are also referred to as CCU (Common
Control Unit) printers, because the hardware control unit
was based on a common design. Because this
publication encompasses more than VM-specific
information, the term :q.group 3:eq. is not used in this
publication, except for definition purposes in the
Glossary section.
group 4. Aterm used in VM-specific environments to
define SNA-attached that use coax or twinax, and
include such printers as the 3130, 381x, 3930, 3935,
391x, and 4028. The group 4 printers can be
communications-attached with 37xx or 3x7x controllers,
or through an SNAtoken ring LAN. Because this
publication encompasses more than VM-specific
198 Printer Information