Adobe 65030365 - FrameMaker - PC Developer's Manual page 389

26
c h a r a c t e r m a p
• By default, FrameMaker assumes that the character set your SGML documents use is
ISO Latin-1. It provides a default mapping between those character sets. For details, see
Appendix E, "Character Set Mapping." For information on other character sets you can
use, see Appendix F, "ISO Public Entities."
• By default, on export FrameMaker produces a character in the SGML document for most
printing characters in the corresponding FrameMaker document. FrameMaker documents
occasionally include unusual characters that serve no purpose outside FrameMaker. For
example, the codes 0x01 and 0x03 are nonprinting characters that represent information
about the insertion point movement. On export FrameMaker traps such characters, so
that they don't appear in an exported SGML document.
Similarly, on import FrameMaker produces a character in the FrameMaker document for
most printing characters. It traps all control characters other than a tab or newline
character.
•
FrameMaker has an 8-bit character set. The SGML declaration can specify any character
set that the SGML parser can handle. Because part of the character set description in
the SGML declaration is not human-readable and may not be interpretable automatically,
any differences between the native FrameMaker character set and the character set in
the SGML document must be specified with the character map rule.
•
By default, FrameMaker discards trapped characters. You can provide an structure API
client to change the processing of trapped characters. For information on creating an
structure API client, see the Structure Import/Export API Programmer's Guide.
Examples
•
Both the FrameMaker and default SGML character sets have a character code for the
character ó (lowercase o with an acute accent). In FrameMaker, the character code is
0x97; in the default SGML character set, the character code is 0xF3. If you want to trap
the SGML character that looks like ó, you might try using this rule:
character map is "ó" = trap;
Because you enter your read/write rules in a FrameMaker document, however,
FrameMaker interprets that rule as:
character map is 0x97 = trap;
which is not the behavior you want. Instead, you should use this rule:
character map is 0xF3 = trap;
•
By default, FrameMaker maps the SGML broken bar character to the FrameMaker solid
bar character |. The rule for doing so could be written in the following equivalent ways:
character map is 0xA6 = "|";
character map is 0xA6 = 0x7C;
character map is "\xA6" = "\x7C";
•
To trap the SGML broken bar character, use this rule:
character map is 0xA6 = trap;
Structure Application Developer's Guide 371