dtdparse - Generate an XML representation of an SGML or XML DTD.

       Originally developed by Norman Walsh, <ndw@nwalsh.com>.

       Earl Hood <earl@earlhood.com> picked up support and maintenance.

       <http://dtdparse.sourceforge.net/>

       See SGML::DTDParse for copyright and license information.

perl v5.32.1                                       2022-01-21                                       DTDPARSE(1p)

dtdparse parses an XML or SGML DTD and prints an XML representation of it.  The XML version can be
       further processed by other tools to aid in the analysis and documentation of the DTD.

       The first non-option-related argument provided on the command-line specifies the file to parse.  If no
       filename is given, then the DTD is read from standard input.

       The generated XML document is printed to standard output unless the "--output" option is specified.

       dtdparse - Generate an XML representation of an SGML or XML DTD.

       --catalog <catalog>
           Specify  catalog  files  to  parse  for  resolving  external  entity  references.  This option can be
           specified multiple times.

           NOTE: Currently, only SGML Open Catalog format is supported.  XML Catalog support is not  implemented
           (yet).

       --debug
           Extra  debugging  output.   This  option  can  be  specified multiple times to increase the amount of
           output.

           Debugging output is sent to standard error.

       --declaration <file>
           Specify the SGML declaration.  The SGML declaration is parsed to determine  the  type  of  DTD  being
           parsed,  XML  or  SGML.   The key parts of the SGML declaration examined are the NAMECASE and CHARSET
           directives to determine the DTD type.

           If no SGML declaration is  available,  the  "--xml",  "--namecase-general",  and  "--namecase-entity"
           options can be used.

       --namecase-general
       --nonamecase-general
           In  the  absence  of  an SGML declaration, these options specifiy if "NAMECASE GENERAL" is YES or NO.
           The default is YES unless "--xml" is specified.

       --namecase-entity
       --nonamecase-entity
           In the absence of an SGML declaration, these options specifiy if "NAMECASE ENTITY" is YES or NO.  The
           default is NO.

       --output <file>
           Specifies the filename to send XML output.

       --public-id <pubid>
           The DTD's public ID.

       --system-id <sysid>
           The DTD's system ID.

       --title <title>
           Set the title of the DTD.

       --unexpanded
       --nounexpanded
           Include, or do not include, unexpanded content models  in  generated  XML.   By  default,  unexpanded
           content models are included.

           It  is  common for DTD authors and maintainers to use parameter entities within content models.  When
           this option is enabled, dtdparse will include a version of content models with parameter entities not
           expanded.

       --verbose
       --noverbose
           Print parsing progress.  By default, this option is enabled.  Verbose  output  is  sent  to  standard
           error.

           If "--debug" is specified, then this option is automatically enabled.

       --xml
       --noxml
           In  the absence of an SGML declaration, this option specifies if the DTD is an XML DTD or an SGML DTD
           (the default is --noxml).

       --version
           Print version and synopsis.

       --help
           Print synopsis and options available.

       --man
           Print manual page.

Getopt::Long, Text::DelimMatch

       dtdformat, dtddiff, dtdflatten

       See SGML::DTDParse for an overview of the DTDParse package.

        dtdparse [options] [dtdfile]