Module-invoking templates may have nested parameters; for example, {{#invoke:module|user={{{1|{{{user|}}}}}}}}
can be transcluded as {{template|user=value|1=value}}. In this case, |1= and |user= should be regarded as
instantiating the same template argument, and any non-empty |user= argument should override the |1= argument
if any. To specify this type of argument hierarchies, pass [['1', 'user'], [...]]. Then, |1= will be
overridden by |user= any time when an argument registration takes place and the operation detects the presence
of a lower-hierarchy argument in the Template instance.
Argument hierarchies.
Module-invoking templates may have nested parameters; for example,
{{#invoke:module|user={{{1|{{{user|}}}}}}}}can be transcluded as{{template|user=value|1=value}}. In this case,|1=and|user=should be regarded as instantiating the same template argument, and any non-empty|user=argument should override the|1=argument if any. To specify this type of argument hierarchies, pass[['1', 'user'], [...]]. Then,|1=will be overridden by|user=any time when an argument registration takes place and the operation detects the presence of a lower-hierarchy argument in the Template instance.