This is the ".at" template. It should be called in the following format:

{{.at
|list of decimals, each on a separate line
|decimal subobject names, each on a separate line
|decimal array names, each on a separate line

|set property=property name (default=.at)
|value count=max || min:max (default=0:*)
|value constraint=
}}

Best Practices:Planned facets