Default context filters in Genesis and how to use them (adding attributes, for schema markup,....). http://www.rfmeier.net/using-genesis_markup-with-html5-in-genesis-2-0/
Default context filters in Genesis
Context Filter Schema
body genesis_attr_body http://schema.org/WebPage
site-header genesis_attr_site-header http://schema.org/WPHeader
site-title genesis_attr_site-title
site-description genesis_attr_site-description
nav-primary genesis_attr_nav-primary http://schema.org/SiteNavigationElement
nav-secondary genesis_attr_nav-secondary http://schema.org/SiteNavigationElement
content genesis_attr_content http://schema.org/Blog
http://schema.org/SearchResultsPage
entry genesis_attr_entry http://schema.org/BlogPosting
http://schema.org/CreativeWork
entry-image genesis_attr_entry-image
image-widget genesis_attr_entry-image-widget
entry-image-grid-loop genesis_attr_entry-image-grid-loop
entry-time genesis_attr_entry-time
entry-title genesis_attr_entry-title
entry-content genesis_attr_entry-content
entry-comments genesis_attr_entry-comments
comment genesis_attr_comment http://schema.org/UserComments
comment-author genesis_attr_comment-author http://schema.org/Person
author-box genesis_attr_author-box http://schema.org/Person
sidebar-primary genesis_attr_sidebar-primary http://schema.org/WPSideBar
sidebar-secondary genesis_attr_sidebar-secondary http://schema.org/WPSideBar
site-footer genesis_attr_site-footer http://schema.org/WPFooter