prep_atom_text_construct

					esc_url( $url ),
					esc_attr( $length ),
					esc_attr( $type )
				);

				/**
				 * Filters the atom enclosure HTML link tag for the current post.
				 *
				 * @since 2.2.0
				 *
				 * @param string $html_link_tag The HTML link tag with a URI and other attributes.
				 */
				echo apply_filters( 'atom_enclosure', $html_link_tag );
			}
		}
	}
}

/**
 * Determine the type of a string of data with the data formatted.
 *
 * Tell whether the type is text, HTML, or XHTML, per RFC 4287 section 3.1.
 *
 * In the case of WordPress, text is defined as containing no markup,
 * XHTML is defined as "well formed", and HTML as tag soup (i.e., the rest).
 *
 * Container div tags are added to XHTML values, per section 3.1.1.3.
 *
 * @link http://www.atomenabled.org/developers/syndication/atom-format-spec.php#rfc.section.3.1
 *
 * @since 2.5.0