Shorthand for creating Post pages. Note that this node is automatically assigned the id 'blog' for easy referencing when creating 'linked' nodes like <menuitem>. See <page> for more information on supported attributes.
<blog></blog>
is the same as writing:
<post type='page' option='page_for_posts' ></post>
option : 'page_for_posts'
id : 'blog'
<blog>
<title>My Blog</title>
</blog>