Genesis helper code for schema

archive-speaking_event.php

<?php

add_filter( 'genesis_attr_content', 'yoast_schema_empty', 20 );
add_filter( 'genesis_attr_entry', 'yoast_schema_event', 20 );    
add_filter( 'genesis_attr_entry-title', 'yoast_itemprop_name', 20 );
add_filter( 'genesis_attr_entry-content', 'yoast_itemprop_description', 20 );
add_filter( 'genesis_post_title_output', 'yoast_title_link_schema', 20 );

/**
 * We'll use the post info output to add more meta data about the event.
 *
 * @param string $info
 * @return string
 */
function yoast_speaking_post_info( $info ) {
  global $post;
	$date 		= esc_html( get_post_meta( $post->ID, 'date', true ) );
	$startdate 	= '<meta itemprop="startDate" content="' . date('c', strtotime( $date ) ).'">' . $date;
	$enddate 	= esc_html( get_post_meta( $post->ID, 'enddate', true ) );

	if ( $enddate && $enddate != $date )
		$startdate .= ' - <meta itemprop="endDate" content="' . date( 'c', strtotime( $enddate ) ).'">' . $enddate;

	$location = esc_html( get_post_meta( $post->ID, 'location', true ) );
	if ( $location )
		$location = 'at <span itemprop="location" itemscope itemtype="http://schema.org/Place"><span itemprop="name">' . $location . '</span>, ';

	$city 		= esc_html( get_post_meta( $post->ID, 'city', true ) );
	$country 	= esc_html( get_post_meta( $post->ID, 'country', true ) );
	if ( $location )
		$location .= '<span itemprop="address" itemscope itemtype="http://schema.org/PostalAddress"><span itemprop="addressLocality">' . $city . '</span>, <span itemprop="addressCountry">' . $country . '</span></span>';
	else 
		$location = '<span itemprop="location" itemscope itemtype="http://schema.org/Place"><span itemprop="address" itemscope itemtype="http://schema.org/PostalAddress"><span itemprop="addressLocality">' . $city . '</span>, <span itemprop="addressCountry">' . $country . '</span></span></span>';
		
	return "$startdate $location";
}
add_filter( 'genesis_post_info' , 'yoast_speaking_post_info' );

genesis();

genesis-schema-helper-functions.php

<?php

// Remove the schema markup from an element
function yoast_schema_empty( $attr ) {
    	$attr['itemtype'] = '';
	$attr['itemprop'] = '';
	$attr['itemscope'] = '';
	return $attr;
}

// Change the schema type of an element to Product
function yoast_schema_product( $attr ) {
	$attr['itemtype'] = 'http://schema.org/Product';
	$attr['itemprop'] = '';
	$attr['itemscope'] = 'itemscope';
	return $attr;
}

// Change the schema type of an element to Event
function yoast_schema_event( $attr ) {
	$attr['itemtype'] = 'http://schema.org/Event';
	$attr['itemprop'] = '';
	$attr['itemscope'] = 'itemscope';
	return $attr;
}

// Change the schema type of an element to Review
// Make sure the itemprop is set to review so this can be used in conjunction with Event or Product
function yoast_schema_review( $attr ) {
	$attr['itemtype'] = 'http://schema.org/Review';
	$attr['itemprop'] = 'review';
	$attr['itemscope'] = 'itemscope';
	return $attr;
}

// Set the itemprop of an element to description
function yoast_itemprop_description( $attr ) {
	$attr['itemprop'] = 'description';
	return $attr;
}

// Set the itemprop of an element to name
function yoast_itemprop_name( $attr ) {
	$attr['itemprop'] = 'name';
	return $attr;
}

// Remove the rel="author" and change it to itemprop="author" as the Structured Data Testing Tool doesn't understand 
// rel="author" in relation to Schema, even though it should according to the spec.
function yoast_author_schema( $output ) {
	return str_replace( 'rel="author"', 'itemprop="author"', $output );
}

// Add the url itemprop to the URL of the entry
function yoast_title_link_schema( $output ) {
	return str_replace( 'rel="bookmark"', 'rel="bookmark" itemprop="url"', $output );
}