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man/man7/htmlroff.7
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342
man/man7/htmlroff.7
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.TH HTMLROFF 7
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.SH NAME
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htmlroff \- HTML formatting and typesetting
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.SH DESCRIPTION
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.I Htmlroff (1)
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accepts
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.I troff
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input with a few extensions and changes.
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This manual describes the changes to the input language,
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assuming a working knowledge of
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.I troff
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itself.
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.SS Name lengths
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.PP
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Request, macro, string, and number names can be longer
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than two letters, as in:
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.IP
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.EX
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\&.html c <center>
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\&.de footnote
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Footnote here.
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\&..
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\&.footnote
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\&.ds string "hello
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\&\e*[string]
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\&.nr number 1
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\&\en[number]
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.EE
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.SS HTML output
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.PP
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Two new requests:
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.IP
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.EX
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\&.html \fIid\fP \fR[ \fI<html>\fP ]\fL
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\&.ihtml \fIid\fP \fR[ \fI<ihtml>\fP ]\fL
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.EE
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.LP
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.B .html
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and
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.B .ihtml
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insert HTML into the output.
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The requests are only for opening new HTML tags.
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To close previously-opened tags, repeat the request
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with the same
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.IR id .
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For example, the input:
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.IP
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.EX
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\&.html t <table><tr>
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\&.html td <td>Cell 1
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\&.html td <td>Cell 2
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\&.html td
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\&.html t
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.EX
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.LP
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produces this output:
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.IP
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.EX
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<table><tr><td>Cell 1</td><td>Cell 2</td></tr></table>
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.EE
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.LP
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The
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.B .html
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request is intended for block-level HTML constructs (those that can contain
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.BR <p> )
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and maintains the HTML tag stack automatically.
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Intermediate tags need not be explicitly closed:
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removing the final
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.B \&.html t
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line in the example above would produce the same output.
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The special
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.I id
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.L -
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closes the HTML tags immediately after printing them.
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.PP
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The
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.B .ihtml
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request is similar to
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.B .html
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but is intended for inline HTML constructs such as
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.B <b>
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or
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.B <i>
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(those that can be contained
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within
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.BR <p> ).
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Unlike
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.BR .html ,
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.B .ihtml
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treats the open HTML tags as a set rather than a stack:
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each must be explicitly closed.
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Although it treats the tags as a set,
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.B .ihtml
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treats nesting properly in the output,
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closing and reopening tags as necessary.
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For example, the input:
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.IP
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.EX
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\&.ihtml style <b>
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\&.ihtml link <a href="link.html">
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Bold
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\&.ihtml style <i>
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and italic, still linked.
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\&.ihtml link <a>
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Unlinked.
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\&.ihtml style
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.EE
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.LP
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produces this output:
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.IP
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.EX
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<b><a href="link.html">Bold</a></b>
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<i><a href="link.html">and italic, still linked.</i></a>
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<i>Unlinked.</i>
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.EE
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.PP
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Outside of
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.B .html
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and
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.B .ihtml
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requests, the characters
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.L < ,
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.L > ,
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and
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.L &
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are treated as normal characters, not HTML markers,
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and are translated to
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.L < ,
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.L > ,
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and
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.L &
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on output.
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To embed the raw HTML markers, use
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.L \e< ,
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.L \e> ,
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and
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.L \e@
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.RI [ sic ].
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.SS Font changes
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.PP
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.I Htmlroff
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interprets the usual
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.BR \ef ,
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.BR .ft ,
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.BR \es ,
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and
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.B .ps
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requests to change the font and point size.
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After applying each such change to its internal registers,
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.I htmlroff
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invokes the
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.B .font
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macro to emit corresponding HTML.
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The default definition of
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.B .font
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is:
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.IP
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.EX
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\&.de font
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\&.ihtml f1
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\&.ihtml f
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\&.ihtml f <span style=\"font-size=\\n(.spt\">
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\&.if \\n(.f==2 .ihtml f1 <i>
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\&.if \\n(.f==3 .ihtml f1 <b>
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\&.if \\n(.f==4 .ihtml f1 <b><i>
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\&.if \\n(.f==5 .ihtml f1 <tt>
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\&.if \\n(.f==6 .ihtml f1 <tt><i>
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\&..
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.EE
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.LP
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Input files can redefine
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.B .font
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like any other request or macro.
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.SS Paragraphs
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.I Htmlroff
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implements line height, text adjustment, and margins by
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wrapping all output text in
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.B <p style="...">
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tags.
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This behavior can be disabled by setting the
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.B .paragraph
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number register to zero.
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Setting the
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.B .margin
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register to zero
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eliminates only the margin annotations.
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.SS Subscripts and superscripts
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.PP
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.I Htmlroff
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interprets the
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.BR \eu ,
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.BR \ed ,
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and
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.BR \ev
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requests to move vertically during output.
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It emits output vertically offset up the page inside
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.B <sup>
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tags and output vertically offset down the page
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inside
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.B <sub>
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tags.
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This heuristic handles simple equations formatted by
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.IR eqn (1).
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.SS Conditional input
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.PP
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To make it easier to write input files that can be formatted by both
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.I troff
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and
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.IR htmlroff ,
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.I htmlroff
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adds a new condition
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.B h
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which evaluates true in
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.B .if
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and
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.B .ie
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requests.
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The
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.B t
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condition continues to evaluate true, to accomodate
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input files trying to distinguish between
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.I troff
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and
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.IR nroff .
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To write a conditional matching
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.I troff
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alone, use
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.RB ` ".if !h .if t" '.
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.PP
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.I Htmlroff 's
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handling of conditional input does not match
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.IR troff 's
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exactly.
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For example,
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.IP
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.EX
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\&.if 0 \e{\e
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\&.de xx
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\&..
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\&.\e}
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.EE
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.LP
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redefines the
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.B xx
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macro in
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.I troff
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but not in
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.IR htmlroff .
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Do not write files depending on this behavior, as this bug may be fixed
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in the future.
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.I Htmlroff
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also mishandles
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.B \e}
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in some cases. To work around them, use
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.B .\e}
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on a line by itself, as in the last example.
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.SS Diversions
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.PP
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Diversions in
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.I htmlroff
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use the alignment in effect at the time of the
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diversion
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when output.
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In particular,
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.IP
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.EX
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\&.di xx
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Line here.
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\&.di
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\&.nf
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\&.ce
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\&.xx
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.EE
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.LP
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produces a centered line in
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.I troff
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but not in
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.IR htmlroff .
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The solution is to center inside the diversion, as in
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.IP
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.EX
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\&.di xx
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\&.if h .ce 999
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Line here
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\&.di
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.EE
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.SS Input pipes
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.PP
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.I Htmlroff
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adds a new request
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.B .inputpipe
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.I stop
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.I cmd
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that redirects
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.I htmlroff 's
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input into a pipe to the
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given
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.I cmd .
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The redirection stops on encountering the line
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.IR stop ,
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optionally followed by white space and extra text.
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This is a dangerous and clusmy request, as
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.I htmlroff
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stops interpreting its input during the redirection, so
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.I stop
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must be found in the input itself, not in a macro that
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the input might appear to call.
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Although clusmy,
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.B .inputpipe
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allows input files to invoke
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.I troff
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to handle complicated input.
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For example,
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.B tmac.html
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redefines the
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.B PS
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macro that marks the beginning of a
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.IR pic (1)
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picture:
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.IP
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.EX
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\&.nr png -1 1
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\&.de PS
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\&.ds pngbase "\e\e*[basename]
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\&.if '\e\e*[pngbase]'' .ds pngbase \e\en(.B
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\&.ds pngfile \e\e*[pngbase]\e\en+[png].png
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\&.html - <center><img src="\e\e*[pngfile]"></center>
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\&.inputpipe .PE troff2png >\e\e*[pngfile]
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\&..
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.EE
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.LP
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This macro invokes the shell script
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.I troff2png
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to run troff and convert the Postscript
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output to a PNG image file.
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Before starting the program, the macro creates
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a new file name for the image and prints
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HTML referring to it.
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The new
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.B .B
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register holds the final path element
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(the base name) of the current input file.
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105
man/man7/mhtml.7
Normal file
105
man/man7/mhtml.7
Normal file
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@ -0,0 +1,105 @@
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.TH MHTML 7
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.SH NAME
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mhtml \- macros for formatting HTML
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.SH SYNOPSIS
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.B pic
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.B |
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.B tbl
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.B |
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.B eqn
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.B |
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.B htmlroff
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[
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.B -man
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|
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.B -ms
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]
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.B -mhtml
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.I file
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\&...
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.SH DESCRIPTION
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This package of
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.IR htmlroff (1)
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macro definitions provides convenient macros for formatting HTML.
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It is usually used along with
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.I troff (1)
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macro packages such as
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.IR man (7)
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and
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.IR ms (7).
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.I Mhtml
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replaces some macros defined in the other packages,
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so it should be listed after them on the
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.I htmlroff
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command line.
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.PP
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The following macros are defined:
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.TP
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.B .HTML \fItitle
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Print an HTML header marking the output as
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HTML 4.01 loose transitional encoded in UTF.
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If given, the
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.I title
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is printed inside
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.B <title>
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tags.
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This macro opens the
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.B <html>
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tag, opens and closes the
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.B <head>
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section, and opens
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.B <body> .
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It invokes the
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.B .HEAD
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macro inside the
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.B <head>
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section.
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To add arbitrary lines to the header,
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append to
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.B .HEAD
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before invoking
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.BR .HTML .
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.TP
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.B .FS\fR, \fP.FE
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Accumulate footnotes and print them at the end of the
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document under a \fBNotes\fP heading.
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These replace the macros in
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.IR ms (7).
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To emit the notes accumulated so far, invoke
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.BR .NOTES .
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.TP
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.B .PS\fR, \fP.PE
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Replace input bracketed
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.B .PS
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and
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.B .PE
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with a PNG image corresponding to the output of
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running
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.I troff(1)
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on the input.
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.TP
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.B .TS\fR, \fP.TE
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Identical to
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.B .PS
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and
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.BR .PE .
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.TP
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.B .B1 \fImargin\fP \fIwidth\fR, \fL.B2
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Format the input between
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.B .B1
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and
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.B .B2
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inside a box, with
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.I margin
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(default 10)
|
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pixels between the box and the text.
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The box is set to be
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.I width
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(default 60)
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percent of the current output width.
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.SH FILES
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.B \*9/tmac/tmac.html
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.SH SEE ALSO
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.IR htmlroff (1),
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.IR htmlroff (7),
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.IR ms (7)
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