APPENDIX H
1110
Compatibility and Implementation Notes
STANDARD NAME
ALTERNATIVE
Helvetica
−
Oblique
Helvetica
−
Bold
Helvetica
−
BoldOblique
Times
−
Roman
Times
−
Italic
Times
−
Bold
Times
−
BoldItalic
Symbol
ZapfDingbats
Arial,Italic
Arial,Bold
Arial,BoldItalic
TimesNewRoman
TimesNewRoman,Italic
TimesNewRoman,Bold
TimesNewRoman,BoldItalic
Also, Acrobat 4.0 and earlier viewers incorrectly allow substitution fonts,
such as
TimesNewRoman
and
ArialMT
, to be specified without
FirstChar
,
LastChar
,
Widths
, and
FontDescriptor
entries.
names of standard fonts. The first column shows the proper one (for ex-
ample,
Helvetica
); the second column shows the alternative if one exists
(for example,
Arial
).
63. For Acrobat 3.0 and earlier viewers, all font subsets whose
BaseFont
names differ only in their tags should have the same font descriptor values
and should map character names to glyphs in the same way; otherwise,
glyphs may be shown unpredictably. This restriction is eliminated in
Acrobat 4.0.
64. In principle, the value of the
Encoding
entry could also be the name of a
predefined encoding or an encoding dictionary whose
BaseEncoding
entry is a predefined encoding. However, Acrobat 4.0 and earlier viewers
do not implement this correctly.