You want to parse out the meta tags of a document and display them in a certain order?

# Warning: These are _crappy_ regexes and I haven't run this
($description) = 
  $document =~ 
    /<meta\s+name=['"]description['"]content['"]([^'"]+)['"]/;
($posted) = 
  $document =~ 
    /<meta\s+name=['"]posted['"]\s+content['"]([^'"]+)['"]/;
print "$description, $posted\n";
[download]

But much, much better is HTML::HeadParser. I think it does exactly what you're after (actually - it does exactly what I think you're after :) It's a lightweight HTML parser that just does the head of a document.

I'm not sure what what your %triplets is for - have you already extracted the data and simply want to test for its presence?