Specify a cognostic that links to another display of a higher level of geographic resolution associated with the given geographic entity
1  | geo_link_filter(display, variable, ref_level, desc = NULL, type = "href")
 | 
display | 
 The name of the display to link to.  | 
variable | 
 The variable to use to specify which subset to  | 
ref_level | 
 String that will be used in constructing the cognostic name (e.g. if ref_level = "who_regions", the cognostic will be called "view_who_regions").  | 
desc | 
 An optional description for the cognostic.  | 
type | 
 One of either "href" or "href_hash". "href" will open the link in a new page. "href_hash" will update the page's hash and reload the page (useful when changing state inside an iframe).  | 
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