# phpman > perldoc > Unicode::Stringprep::BiDi

## NAME
    [Unicode::Stringprep::BiDi](https://www.chedong.com/phpMan.php/perldoc/Unicode%3A%3AStringprep%3A%3ABiDi/markdown) - Tables from RFC 3454, Appendix D

## SYNOPSIS
      @[Unicode::Stringprep::Bidi::D1](https://www.chedong.com/phpMan.php/perldoc/Unicode%3A%3AStringprep%3A%3ABidi%3A%3AD1/markdown)        # Appendix D.1
      @[Unicode::Stringprep::Bidi::D2](https://www.chedong.com/phpMan.php/perldoc/Unicode%3A%3AStringprep%3A%3ABidi%3A%3AD2/markdown)        # Appendix D.2

## DESCRIPTION
    The tables are provided as arrays, which contain pairs of Unicode codepoints (as integers)
    defining the start and end of a Unicode range.

    The module exports nothing.

## AUTHOR
    Claus Färber <<CFAERBER@cpan.org>>

## LICENSE
    Copyright 2007-2009 Claus Färber.

    This library is free software; you can redistribute it and/or modify it under the same terms as
    Perl itself.

## SEE ALSO
    [Unicode::Stringprep](https://www.chedong.com/phpMan.php/perldoc/Unicode%3A%3AStringprep/markdown), RFC 3454 (<<http://www.ietf.org/rfc/rfc3454.txt>>)