Shadow Terms

Shadow Terms registers custom (shadow) taxonomies for supported post types. These taxonomies can be used to associate related content from a variety of post types.

When a new post of a supported post type is created, a term mirroring that post is also created. When editing another post type that supports this taxonomy, this term can be assigned to associate the posts.

Shadow Terms does not register support for itself on any post types by default. Custom code must be added to a plugin or theme.

Support can be added to a custom post type with code like:

<?php
// Register the organization post type normally.
register_post_type( 'organization', $args );

// Add support for Shadow Terms to the organization post type.
add_post_type_support(
    'organization',
    'shadow-terms',
    array(…