Provided by: html-xml-utils_7.6-1_amd64 
NAME
hxtoc - insert a table of contents in an HTML file
SYNOPSIS
hxtoc [ -x ] [ -l low ] [ -h high ] [ -t ] [ -d ] [ -c class ] [ -f ] [ file-or-URL ]
DESCRIPTION
The hxtoc command reads an HTML file, inserts missing ID attributes in all H1 to H6 elements between the
levels -l and -h (unless the option -d is in effect, see below) and also inserts A elements with NAME
attributes, so old browsers will recognize the H1 to H6 headers as target anchors as well (unless the
option -t is in effect). The output is written to stdout.
If there is a comment of the form
<!--toc-->
or a pair of comments
<!--begin-toc-->
...
<!--end-toc-->
then the comment, or the pair with everything in between, will be replaced by a table of contents,
consisting of a list (UL) of links to all headers in the document.
The text of headers is copied to this table of contents, including any inline markup, except that ID
attributes, DFN tags and SPAN tags with a CLASS of "index" are omitted (but the elements' content is
copied).
The copied text can optionally be "flattened" first, see option -f.
If a header has a CLASS attribute with as value (or one of its values) the keyword "no-toc", then that
header will not appear in the table of contents.
OPTIONS
The following options are supported:
-x Use XML conventions: empty elements are written with a slash at the end: <IMG />
-l low Sets the lowest numbered header to appear in the table of content. Default is 1 (i.e., H1).
-h high Sets the highest numbered header to appear in the table of content. Default is 6 (i.e., H6).
-t Normally, hxtoc adds both ID attributes and empty A elements with a NAME attribute and
CLASS="bctarget", so that older browsers that do no understand ID will still find the target.
With this option, the A elements will not be generated.
-c class The generated UL elements in the table of contents will have a CLASS attribute with the value
class. The default is "toc".
-d Tries to use sectioning elements as targets in the table of contents instead of H1 to H6. A
sectioning elements is a DIV, SECTION, ARTICLE, ASIDE or NAV element whose first child is a
heading element (H1 to H6) or an HGROUP. The sectioning element will be given an ID if it
doesn't have one yet. With this option, the level of any H1 to H6 that is the first child of a
sectioning element (or of an HGROUP that is itself the first child of a sectioning element) is
not determined by its name, but by the nesting depth of the sectioning elements. (Any H1 to H6
that are not the first child of a sectioning element still have their level implied by their
name.)
-f Flatten the text of the table of contents. Without -f, the contents of header elements are
copied to the table of contents almost unchanged, i.e., including any child elements and their
attributes (except for ID attributes, DFN elements and certain SPAN elements, as explained
above). With -f, the contents are flattened instead: All child elements are removed and only
their contents are copied to the table of contents. Additionally elements with an ALT
attribute, such as IMG, are replaced by the contents of the ALT attribute. Exception: BDO tags
are copied unchanged and elements with a DIR attribute are replaced by a SPAN with that DIR
attribute. (BDO and DIR may occur in languages written right-to-left.)
OPERANDS
The following operand is supported:
file-or-URL
The name or URL of an HTML file. If absent, standard input is read instead.
DIAGNOSTICS
The following exit values are returned:
0 Successful completion.
> 0 An error occurred in the parsing of the HTML file. hxtoc will try to correct the error and
produce output anyway.
SEE ALSO
asc2xml(1), hxnormalize(1), hxnum(1), xml2asc(1)
BUGS
The error recovery for incorrect HTML is primitive.