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I'm calling drupal_add_html_head() a few times to add meta data for facebook integration. To my surprise, this data is not rendered in the order I add it.
Where is this data actually rendered? I would like to examine the code so I can understand the logic behind it.
I'm aware there's hook_html_head_alter too, but without understand the render order, messing with the order of input data is not likely helpful.
template_preprocess_html() gets the tags for the <head>, and adds them to the html.tpl.php template file as $head.
The template file looks like this:
..
<head profile="<?php print $grddl_profile; ?>">
<?php print $head; ?>
<title><?php print $head_title; ?></title>
..
