p[title] selects all paragraphs containing a title attribute.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> <style type="text/css"> p[title] { padding: 5px 10px; border: 1px solid gray; } </style> </head> <body> <p title="Second"><code>p[title]</code> selects all paragraphs containing a title attribute.</p> </body> </html>