The following global variables and functions are available to all CKAN templates in their top-level namespace:
In addition to the above, any variables explicitly passed into a template by a controller action method when it calls render() will also be available to that template, in its top-level namespace.
Any variables explicitly passed into a template snippet in the calling {% snippet %} tag will be available to the snippet in its top-level namespace,
Add links to the default stuff that Jinja provides to all templates.