=head1 NAME

The name of your program or module.

=head1 SYNOPSIS

A one-line description of what your program or module does (purportedly).

=head1 DESCRIPTION

The bulk of your documentation. (Bulk is good in this context.)

=head1 AUTHOR

Who you are. (Or an alias, if you are ashamed of your program.)

=head1 BUGS

What you did wrong (and why it wasn’t really your fault).

=head1 SEE ALSO

Where people can find related information (so they can work around your bugs).

=head1 COPYRIGHT

The copyright statement. If you wish to assert an explicit copyright, you should say something like:

Copyright 2013, Randy Waterhouse.  All Rights Reserved.

注意：每个=标签上下必须隔一行，否则就会错误解析。

=for html   或者 =for text

是把下面的单行注视当作html或者text来处理，与其功能类似的是 =begin html  / =end html    ;   =begin text /  =end text   两对。begin和end之间可以处理多行。

=over  4

=item  SOMEWORD

  *************

=item somewordelse

******

=back

以上写法是写一个列表，以over开头，后面的数字是列表中每行的缩进量。最后以=back 结尾。

=cut    是结束pod块的标志，与程序分开。

在perl中，可以使用 pod2html  **.pm  >**.html 来生成html格式的pod文档。

=pod =cut既可以作为程序多行注释，又可以实现程序usage说明，利用pod2text命令。die (`pod2text $0`);即可