other values to the target attribute.

Target values like _parent and _top are deprecated in HTML5, and I think it's enough to use _self (default), or _blank. The differences about them are which frame you open the contents you link to:

• _self opens in the same frame (the same tab/window)
• _blank opens in a new frame (new tab/window)
• _parent opens in the parent frame (same tab/window, but in the frame that wraps around the frame with your <a>-element)
• _top open in top frame (same tab/window, but in the outermost frame that wraps around all other frames)

I do not think many use these frames (<frameset> and <frame>) nowadays, but it is still supported in browsers - the <iframe> is more used though..

Examples with frames:

<outer_frame>
<!-- content in outer_frame -->

     <middle_frame>
     <!-- content in middle_frame -->

          <inner_frame>
          <!-- content in inner_frame -->
          </inner_frame>

     </middle_frame>

</outer_frame>

If you for example got an <a>-element in the <inner_frame> with target="_parent", the content you link to would be displayed in the <middle_frame>, and if you used target="_top", the content would be displayed in the <outer_frame>.

I also think you could link the contents to specific frames with target="frame_name", but as I said, do not think this is used anymore.