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DVISELECT(1)                                                      DVISELECT(1)



NAME
       dviselect - extract pages from DVI files

SYNOPSIS
       dviselect [ -s ] [ -i infile ] [ -o outfile ] list of pages [ infile [ outfile ] ]

DESCRIPTION
       Dviselect  selects pages from a DVI file produced by TeX, creating a new DVI file usable by any of the TeX con-
       version programs, or even by dviselect itself.

       A range is a string of the form even, odd, or first:last  where  both  first  and  last  are  optional  numeric
       strings,  with  negative numbers indicated by a leading underscore character ''_''.  If both first and last are
       omitted, the colon may also be omitted, or may be replaced with an asterisk ''*''.  A page range is a  list  of
       ranges  separated  by periods.  A list of pages is described by a set of page ranges separated by commas and/or
       white space.

       Dviselect actually looks at the ten count variables that TeX writes; the first of these (\count0) is  the  page
       number,  with  \count1 through \count9 having varied uses depending on which macro packages are in use.  (Typi-
       cally \count1 might be a chapter or section number.)  A page is included  in  dviselect's  output  if  all  its
       \count  values  match  any  one of the ranges listed on the command line.  For example, the command ''dviselect
       *.1,35:'' might select everything in chapter 1, as well as pages 35 and up.  ''dviselect 10:30''  would  select
       pages 10 through 30 (inclusive).  '':43'' means everything up to and including page 43 (including negative-num-
       bered pages).  To get all even-numbered pages, use ''even''; to get all odd-numbered pages, use ''odd''.  If  a
       Table  of  Contents has negative page numbers, '':_1'' will select it.  Note that ''*'' must be quoted from the
       shell; the empty string is more convenient to use, if harder to read.

       Instead of \count values, dviselect can also select by ''absolute page number'', where the first page  is  page
       1, the second page 2, and so forth.  Absolute page numbers are indicated by a leading equal sign ''=''.  Ranges
       of absolute pages are also allowed: ''dviselect =3:7'' will extract the third through seventh pages.  Dot sepa-
       rators are not legal in absolute ranges, and there are no negative absolute page numbers.  Even/odd specifiers,
       however, are legal; ''dviselect =even'' selects every other page, starting with the second.

       More precisely, an asterisk or an empty string implies no limit; an  equal  sign  means  absolute  page  number
       rather  than  \counts;  a  leading  colon means everything up to and including the given page; a trailing colon
       means everything from the given page on; the word ''even'' means only even values shall be accepted;  the  word
       ''odd''  means  only  odd values shall be accepted; and a period indicates that the next \count should be exam-
       ined.  If fewer than 10 ranges are specified, the remaining \counts are left unrestricted (that is, ''1:5'' and
       ''1:5.*''  are  equivalent).  A single number n is treated as if it were the range n:n.  An arbitrary number of
       page selectors may be given, separated by commas or whitespace; a page is selected  if  any  of  the  selectors
       matches its \counts or absolute page number.

       Dviselect normally prints the page numbers of the pages selected; the -s option suppresses this.

AUTHOR
       Chris Torek, University of Maryland

SEE ALSO
       dviconcat(1), latex(1), tex(1)
       MC-TeX User's Guide
       The TeXbook

BUGS
       A  leading ''-'' ought to be allowed for negative numbers, but it is currently used as a synonym for '':'', for
       backwards compatibility.

       Section or subsection selection will sometimes fail, for the DVI file lists only the \count  values  that  were
       active  when  the  page ended.  Clever macro packages can alleviate this by making use of other ''free'' \count
       registers.  Chapters normally begin on new pages, and do not suffer from this particular problem.

       The heuristic that decides which arguments are page selectors and which are file names is often  wrong.   Using
       shell redirection or the -i and -o options is safest.

       Dviselect  does  not adjust the parameters in the postamble; however, since these values are normally used only
       to size certain structures in the output conversion programs, and the parameters  never  need  to  be  adjusted
       upward, this has not proven to be a problem.



                                                                  DVISELECT(1)