Function: Returns the post type’s ID field name

Function: Returns the post type’s name field

Function: Returns whether or not the provided post type is a linked post type

Function: Links two posts together

Function: Unlinks two posts from eachother

Function: Returns the post type’s form field container name

Function: Returns the linked post types

Function: Returns whether or not there are any linked post types

Function: Returns whether or not there are linked posts of the specified post type