Thank you all, I did some test to confirm all your points. Here are the scripts to document this: 
use strict;
use foo;

print "From <DATA>:\n";
print <DATA>;

print "From <foo::DATA>:\n";
print  <foo::DATA>;

print "From <bar::DATA>:\n";
print <bar::DATA>;


__DATA__
a
b
c

[download]
Here's the foo.pm: 
package foo;
use strict;

package bar;

1;
__DATA__
1
2
3
4

[download]
Running the first script gives: 
From <DATA>:
a
b
c
From <foo::DATA>:
From <bar::DATA>:
1
2
3
4

[download]

In reply to Re: __END__ is equivalent to __DATA__ ? by johnnywang
in thread __END__ is equivalent to __DATA__ ? by johnnywang

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.