Allows a Page Blueprint to maintain a persistent connection to its offspring.

This macro allows a user to reuse a blueprint and its substitution fields on pages throughout a site. When the blueprint is subsequently updated, every page using that live blueprint will automatically be updated. 

When using normal Page Blueprints, any changes to the source blueprint will not affect pages previously made from that Blueprint. Sometimes, however, you want to be able to update a blueprint/template and have that change propagate to all of the pages that use that Blueprint. The Live Blueprint Macro allows you to do this.