NAME
    sgmldiff - Find differences in the markup of two SGML files

SYNOPSIS
    sgmldiff [ options ... ] file1 file2 [ -a | --attributes
   | -c [ attributes | nesting | textpos ] | --context [ attributes
    | nesting | textpos ]
   | -s | --statistics
   | -h | --help
   | -v | --version ]

DESCRIPTION
    This perl script allows to determine the structural differences between
    two SGML files. It compares the files, regardless of what is in between
    the tags, to only focus on the  markup. Its output is similar to
    diff(1).

    The typical use of sgmldiff is to compare an SGML file with its trans-
    lation into another language. If  the translation was done cleanly,
    sgmldiff returns without finding any difference in the markup.

    An example of a typical call to sgmldiff is:

    sgmldiff english.sgml italiano.sgml

    If there are differences in markup between both files, sgmldiff will
    output a series of differences reports summarized with lines of the
    form:

    169a164
    At line 169 of the first file, line 164 of the second file has
    been added.

    8a12,15
    At line 169 of the first file, lines 12 to 15 of the second file
    have been added.

    41d28 Line 41 of the first file has been destroyed, to obtain line 28
    of the second file.

    63,66d61
    Lines 63 to 66 of the first file have been destroyed. to obtain
    line 61 of the second file.

    52c51 Line 52 of the first file has been changed into line 51 of the
    second file.

    5,7c8,10
    Lines 5 to 7 of the first file have been changed into lines 8 to
    10 of the second line.  In addition to those summaries, the
    lines of the first file are shown preceeded by '<' and the lines
    of the second file are shown preceeded by '>".

OPTIONS
    Here is the list of actions that can be requested to sgmldiff:

    [ -a | --attributes ]
    Include the attribute values in the difference tests. Don't set
    this value if the attributes are likely to be translated. Set
    this value if the attributes value shouldn't change between both
    files. Default is to don't include the attributes in the differ-
    ence tests.

    [ -c  [ attributes | nesting | textpos ] | --context [
    attributes | nesting | textpos ] ]
    Add more context to the difference. Since every test between the
    tags is removed before testing the differences, sgmldiff is
    likely to resynchronize itself at the wrong place, by thinking
    the location in both files correspond, while it's not true. By
    adding more context to the compared area, such risk is dismin-
    ished.

    The allowed values for the --context option are:

    attributes
     Take into account the attribute names. The attribute val-
     ues are controlled by the attributes option.

    nesting
     Take into  account the nesting level of all the compared
     tags.

    textpos
     Take into account the position in the text.

    [ -s | --statistics ]
    iPrint some SGML information at the end.

    [ -h | --help ]
    Print a short help message and exit

    [ -v | --version ]
    Print the version identifier and exit

FILES
AUTHORS
   Frederik Fouvry
    Developper of sgmldiff.

SEE ALSO
  jw(1)
    conversion from a SGML file to other file formats

 nsgmls(1)
    a base component of Jade DSSSL engine

  http://sources.redhat.com/docbook-tools/  <URL:http://sources.red-
    hat.com/docbook-tools/>
    the home page of the DocBook tools, a compendium of all  tools
    necessary to process DocBook files, including the DocBookr-utils