groff: grohtml
7.8 'grohtml'
=============
The 'grohtml' front end (which consists of a preprocessor,
'pre-grohtml', and a device driver, 'post-grohtml') translates the
output of GNU 'troff' to HTML. Users should always invoke 'grohtml' via
the 'groff' command with a '\-Thtml' option. If no files are given,
'grohtml' will read the standard input. A filename of '-' will also
cause 'grohtml' to read the standard input. HTML output is written to
the standard output. When 'grohtml' is run by 'groff', options can be
passed to 'grohtml' using 'groff''s '-P' option.
'grohtml' invokes 'groff' twice. In the first pass, pictures,
equations, and tables are rendered using the 'ps' device, and in the
second pass HTML output is generated by the 'html' device.
'grohtml' always writes output in 'UTF-8' encoding and has built-in
entities for all non-composite unicode characters. In spite of this,
'groff' may issue warnings about unknown special characters if they
can't be found during the first pass. Such warnings can be safely
ignored unless the special characters appear inside a table or equation,
in which case glyphs for these characters must be defined for the 'ps'
device as well.
This output device is fully documented on its manual page,
'grohtml(1)'.
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