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Man Pages


Manual Reference Pages  -  HTML2XHTML (1)

NAME

html2xhtml - Converts HTML files to XHTML

CONTENTS

Syntax
Description
Options
Note On Character Sets
Note On End Of Line Charactes
Acknowledgments

SYNTAX

html2xhtml [ filename ] [ options ]

DESCRIPTION

Html2xhtml is a command-line tool that converts HTML files to XHTML files. The path of the HTML input file can be provided as a command-line argument. If not, it is read from stdin.

Xhtml2xhtml tries always to generate valid XHTML files. It is able to correct many common errors in input HTML files without loose of information. However, for some errors, html2xhtml may decide to loose some information in order to generate a valid XHTML output. This can be avoided with the -e option, which allows html2xhtml to generate non-valid output in these cases.

Html2xhtml can generate the XHTML output compliant to one of the following document types: XHTML 1.0 (Transitional, Strict and Frameset), XHTML 1.1, XHTML Basic and XHTML Mobile Profile.

OPTIONS

The command line options/arguments are:
filename Read the HTML input from filename (optional argument). If this argument is not provided, the HTML input is read from standard input.
-o filename Output XHTML file. The file is overwritten if it exists. If not provided, the output is written to standard output.
-e Instructs the program to propagate input chunks to the output even if it is unable to adapt them to the output XHTML doctype. Using this option, the XHTML output may be non-valid. Not using this option, some input data could be removed from the output in some [rare] cases.
-t output-doctype Doctype of the output XHTML file. If not specified, the program selects automatically either XHTML 1.0 Transitional or XHTML 1.0 Frameset depending on the input. Current available doctypes are:
o transitional XHTML 1.0 Transitional
o frameset XHTML 1.0 Frameset
o strict XHTML 1.0 Strict
o 1.1 XHTML 1.1
o basic-1.0 XHTML Basic 1.0
o basic-1.1 XHTML Basic 1.1
o mp XHTML Mobile Profile
o print-1.0 XHTML Print 1.0
--ics input_charset Character set of the input document. This option overrides the default input character set detection mechanism.
--ocs output_charset Character set for the output XHTML document. If this option is not present, the character set of the input is used as default.
--lcs Dump the list of available character set aliases and exit html2xhtml. No conversion is performed when this option is present.
-l line_length Number of characters per line. The default value is 80. It must be greater or equal to 40, otherwise the parameter is ignored.
-b tab_length Tab length in number of characters. It must be a number between 0 and 16, otherwise the parameter is ignored. Use 0 to avoid indentation in the output.
--preserve-space-comments Use this option to preserve white spaces, tabs and ends of lines in HTML comments. The default, if not provided, is to rearrange spacing.
--no-protect-cdata Enclose CDATA sections in "script" and "style" following the XHTML 1.0 specification (using "<!CDATA[[" and "]]>"). It might be incompatible with some browsers. The default in this version is to enclose CDATA sections using "//<!CDATA[[" and "//]]>", because major browsers handle it properly.
--compact-block-elements No white spaces or line breaks are written between the start tag of a block element and the start tag of its first enclosed inline element (or character data) and between the end tag of its last enclosed inline element (or character data) and the end tag of the block element. By default, if this option is not set, a new line character and indentation is written between them.
--compact-empty-elm-tags Do not write a whitespace before the slash for empty element tags (i.e. write "<br/>" instead of the default "<br />"). Note that although both notations are correct in XML, the XHTML 1.0 standard recommends the latter to improve compatibility with old browsers.
--empty-elm-tags-always By default, empty element tags are written only for elements declared as empty in the DTD. This option makes any element not having content to be written with the empty element tag, even if it is not declared as empty in the DTD. This option may cause problems when the XHTML document is opened by browsers in HTML (tag soup) mode.
--dos-eol Write the output XHTML file with DOS--style (CRLF) end of line, instead of the default UNIX--style end of line. Both end of line styles are allowed by the XML recommendation.
--generate-snippet Treat the input as an HTML fragment instead of a full document. The output will also be a snippet and will not contain either the XML and doctype declarations or the html, head and body elements.
--help Show a brief help message and exit.
--version Show the version number and exit.

NOTE ON CHARACTER SETS

Since version 1.1.2, html2xhtml is able to parse and write HTML and XHTML documents using the most popular character sets / encodings. It is also able to read the input document using a given character set and generate an output that uses a different character set. The iconv implementation in the GNU C library is used with that purpose.

Any IANA-registered character set that is supported by the iconv library may be used. When naming a character set, any IANA--approved alias for it may be used. The full list of aliases recognised by html2xhtml can be obtained with the --lcs command-line option.

If the character set of the input document is not specified, html2xhtml tries to guess it automatically. If the character set of the output document is not specified, html2xhtml writes the output using the same character set as the input document.

NOTE ON END OF LINE CHARACTES

By default, the UNIX-style one-byte end of line is used. It can be changed to DOS-style CRLF end of line with the --dos-eol command-line option.

However, when the program is compiled in the MinGW environment and the output is sent to standard output, the output is automatically converted by the environment to CRLF by default. Do not use the --dos-eol command-line option in that situation. When the output is sent to a file with the -o command-line option, the output is as expected (UNIX-style by default), and the --dos-eol option may be used.

ACKNOWLEDGMENTS

Program developer up to current version: Jesus Arias Fisteus <jaf@it.uc3m.es>

The first working version of this program has been developed as a Master Thesis at the University of Vigo (Spain) [http://www.uvigo.es], advised by:

Rebeca Diaz Redondo Ana Fernandez Vilas

Copyright 2000-2001 by Jesus Arias Fisteus, Rebeca Diaz Redondo, Ana Fernandez Vilas. Copyright 2002-2009 by Jesus Arias Fisteus

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