is_archive() we can know whether it is archive page or not.
But if it is archive page how can i find whether it is author archive page or category archive or date archive.
I have found this code in wp-includes/query.php
if ( $this->is_post_type_archive || $this->is_date || $this->is_author || $this->is_category || $this->is_tag || $this->is_tax ) $this->is_archive = true;
but dont know how to use it in wp_head action.
Based on archive page category or author or date archive, i want to out put specific meta tags in header.
Thanks in advanced.