[Mediawiki-l] infobox - frpopd - frpopdata

[lmhelp2]

Hi everyone,

Thank you for reading my post.

I am dealing with the following "infobox"
(I am sorry, it is a French one, I hope you won't mind... :-(
but I couldn't find an English equivalent...)

--------------------------------------------------------------------------
 1  {{Infobox Département de France
 2   | département = Aude
 3   | insee = [[11 (nombre)|11]]
 4   | logo = [[Fichier:Logo 11 aude.jpg|100px]]
 5   | région = [[Languedoc-Roussillon]]
 6   | Préfecture = [[Carcassonne]]
 7   | Sous-préfectures = [[Limoux]]<br />[[Narbonne]]
 8   | population = {{frpopd|11}}
 9   | DatePop = [[{{frpopdata}}]]
10  | sup = 6139
11  | arr = [[Arrondissements de l'Aude|3]]
12  | circonscription = [[Liste des circonscriptions législatives de
l'Aude|3]]
13  | canton = [[Cantons de l'Aude|35]]
14  | intercommun = [[Intercommunalités de l'Aude|30]]
15  | comm = [[Communes de l'Aude|438]]
16  | président = [[Marcel Rainaud]] ([[Parti socialiste (France)|PS]])
17  | préfet = [[Anne-Marie Charvet]]
18  | loc = [[Fichier:Aude departement locator map.svg|300px]]
19  }}
--------------------------------------------------------------------------

Please, have a look at lines 8 and 9.
Can you see those two things "{frpopd|11}" and "{{frpopdata}}"?
I am wondering what these things are (templates?)? 
and where I can find some documentation about it?
The visual results are respectively:
- 56 hab./km²
- 345 779 hab. (2007)
if I am not mistaken...
I am wondering where is the data stored and retrieved?

Thank you for your help.
Best regards,
--
Lmhelp



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