misc/cwfs/cwfs-spec.txt
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Thu, 15 Oct 2009 10:56:34 +0200
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permissions -rw-r--r--
fix merge
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=======================
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 Specification cubicwebfs
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=======================
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Remarque: cubicwebfs c'est le siamois de yamsfs
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en fait c'est un yamsfs avec une interrogation
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de base RQL
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Modèle
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-------
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Description du modèle;
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::
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  societe
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  nom
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  ville
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  affaire
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  ref
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  document
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  annee 
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  mois 
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  jour
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  type {RAP,CLI,OFR,FCT}
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  fichier
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document concerne affaire
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affaire concerne societe
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Contenu de la base exemple
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---------------------------
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societe  | nom     | ville    |
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         | CETIAD  | Dijon    |
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         | EDF R&D | Clamart  |
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         | Logilab | Paris    |
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affaire  | ref    | concerne  |
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         | CTIA01 | CETIAD    |
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         | EDFR01 | EDF R&D   |
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         | EDFR02 | EDF R&D   |
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document | annee | mois | jour | type | concerne | fichier                                     |
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         | 2004  | 09   | 06   | PRE  | CTIA01   | depodoc/2004/09/CTIA01-040906-PRE-1-01.pdf  |  
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         | 2005  | 02   | 01   | CLI  | EDFR01   | depodoc/2005/02/EDFR01-050201-CLI-1-01.pdf  |  
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         | 2005  | 03   | 22   | OFR  | EDFR01   | depodoc/2005/02/EDFR01-050322-OFR-1-01.pdf  |  
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Exemples de chemins/recherches
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-------------------------------
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Cherche documents de mars 2005;
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::
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  /document/annee/2005/mois/03/
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Dont le contenu successif serait;
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Test::
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  $ ls /document
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  annee/	mois/		jour/		type/
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  affaire/	concerne/	CTIA01-040906-PRE-1-01.pdf
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  EDFR01-050201-CLI-1-01.pdf	EDFR01-050322-OFR-1-01.pdf	
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  $ ls /document/annee/
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  2004/		2005/
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  $ ls /document/annee/2005/
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  mois/		jour/		type/		affaire/
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  concerne/	EDFR01-050201-CLI-1-01.pdf	EDFR01-050322-OFR-1-01.pdf
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  $ ls /document/annee/2005/mois/
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  02/		03/
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  $ ls /document/annee/2005/mois/03/
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  jour/		type/		affaire/	concerne/
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  EDFR01-050322-OFR-1-01.pdf
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Question: est-ce que fichier/ ne va pas nous manquer ?
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Cherche documents relatifs à CTIA01; 
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::
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  /affaire/ref/CTIA01/document/
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Dont le contenu des répertoires successifs serait:
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Test::
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  $ ls /affaire/
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  ref/		societe/	concerne/	document/
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  concerne_par/	CTIA01		EDFR01		EDFR02
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  $ ls /affaire/ref/
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  CTIA01/	EDFR01/		EDFR02/
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  $ ls /affaire/ref/CTIA01/
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  societe/	concerne/	document/	concerne_par/
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  $ ls /affaire/ref/CTIA01/document/
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  annee/	mois/		jour/		type/
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  CTIA01-040906-PRE-1-01.pdf
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Cherche documents des affaires qui concernent CETIAD;
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::
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  /societe/nom/CETIAD/affaire/document/
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Dont le contenu des répertoires successifs serait;
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Test::
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  $ ls /societe/
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  nom/		ville/		affaire/	concerne_par/
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  CETIAD	EDF R&D		Logilab
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  $ ls /societe/nom/
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  CETIAD	EDF R&D		Logilab
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  $ ls /societe/nom/CETIAD/
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  ville/	affaire/	concerne_par/	CETIAD		Logilab
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  $ ls /societe/nom/CETIAD/affaire/
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  ref/		societe/	concerne/	document/
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  concerne_par/	CTIA01		
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  $ ls /societe/nom/CETIAD/affaire/document/
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  annee/	mois/		jour/		type/
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  affaire/	concerne/	CTIA01-040906-PRE-1-01.pdf
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En particulier, pour la recherche ci-dessus on ne peut pas écrire;
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::
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  /document/affaire/concerne/societe/CETIAD/
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La logique est que si on est dans un répertoire document, il faut
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qu'il contienne des documents.
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Cherche documents de 2002 qui concernent des affaires 
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qui concernent CETIAD;
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::
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  /societe/CETIAD/affaire/document/annee/2002/
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Question: est-ce que les relations doivent être des composants
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du chemin ?
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Question : si les relations ne font pas partie du chemin, il faudrait
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pouvoir faire des recherches en utilisant des relations anonymes (ce
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qui est impossible en RQL par exemple);
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::
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  /document/affaire/... s'il existe plusieurs relations entre
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  les entités document et affaire, on ne peut pas s'en sortir
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Question: que va-t-il se passer pour des chemins du type;
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::
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  /affaire/CTIA*/document/
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Nicolas: à mon avis on a rien à faire, car c'est le shell qui
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s'en occupe. De la même façon, le système de fichier n'a pas
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à se préoccuper de ~/ et les programmes reçoivent pas le "qqch*"
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en argument, mais directement la liste.
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Attention: si jamais l'arborescence est sans fond, les
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commandes récursives vont prendre du temps...
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Attention: dans un premier temps, un système de fichiers en
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lecture seule est satisfaisant. on verra ensuite pour l'édition.
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pour l'édition, on peut s'inspirer du external editor de zope
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et avoir un format d'échange XML entre le serveur et l'éditeur.
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Le cas suivant est débile, faut-il l'interdire ?
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::
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  /document/affaire/societe/concerne_par/affaire/concerne_par/document
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NB: manque détail d'un cas comme /document/annee/2005/concerne/affaire/
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