c:\@Work\Perl\monks>perl
use strict;
use warnings;

use YAPE::Regex::Explain;

print YAPE::Regex::Explain->new(qr/data-src-hq="([^"]+)"/)->explain;

__END__
The regular expression:

(?-imsx:data-src-hq="([^"]+)")

matches as follows:

NODE                     EXPLANATION
----------------------------------------------------------------------
(?-imsx:                 group, but do not capture (case-sensitive)
                         (with ^ and $ matching normally) (with . not
                         matching \n) (matching whitespace and #
                         normally):
----------------------------------------------------------------------
  data-src-hq="            'data-src-hq="'
----------------------------------------------------------------------
  (                        group and capture to \1:
----------------------------------------------------------------------
    [^"]+                    any character except: '"' (1 or more
                             times (matching the most amount
                             possible))
----------------------------------------------------------------------
  )                        end of \1
----------------------------------------------------------------------
  "                        '"'
----------------------------------------------------------------------
)                        end of grouping
----------------------------------------------------------------------

##</code><code>##

c:\@Work\Perl\monks>perl
use strict;
use warnings;

my $s = 'foo "xyzzy" bar';

print qq{+? (lazy) quantifier with final ":    matched '$1' \n} if $s =~ /"([^"]+?)"/;
print qq{+? (lazy) quantifier without final ": matched '$1' \n} if $s =~ /"([^"]+?)/;

__END__
+? (lazy) quantifier with final ":    matched 'xyzzy'
+? (lazy) quantifier without final ": matched 'x'