diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c500c3..117ad39 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,10 +9,16 @@ Tyto - Littérateur
 
 # CURRENTLY IN DEV !
 
+## [1.9.11]
+- Preparing for multi-targets with "all"
+- check if article is a .tyto format
+- preparing values for articles
+
 ## [1.9.10]
 - cleaner code
 - start/stop domain by user
 - User directories check/create when domain activated
+- Check install configuration
 
 ## [1.9.9]
 - cleaner code with new check/update domain process
diff --git a/src/usr/bin/tyto b/src/usr/bin/tyto
index abf0518..099edab 100755
--- a/src/usr/bin/tyto
+++ b/src/usr/bin/tyto
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
-# Version: 1.9.10
-# Updated: 2023-09-29 1695998917
+# Version: 1.9.11
+# Updated: 2023-09-29 1696004712
 # Tyto - Littérateur
 
 # Copyright (C) 2023 Cyrille Louarn <echolib+tyto@a-lec.org>
diff --git a/src/var/lib/tyto/program/__pycache__/args.cpython-311.pyc b/src/var/lib/tyto/program/__pycache__/args.cpython-311.pyc
index 3515f88..17afd7e 100644
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diff --git a/src/var/lib/tyto/program/__pycache__/check.cpython-311.pyc b/src/var/lib/tyto/program/__pycache__/check.cpython-311.pyc
index fb38194..bc9ecf4 100644
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diff --git a/src/var/lib/tyto/program/__pycache__/domain.cpython-311.pyc b/src/var/lib/tyto/program/__pycache__/domain.cpython-311.pyc
index 2598c44..6e05990 100644
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diff --git a/src/var/lib/tyto/program/__pycache__/post.cpython-311.pyc b/src/var/lib/tyto/program/__pycache__/post.cpython-311.pyc
index be29656..235c5b2 100644
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diff --git a/src/var/lib/tyto/program/__pycache__/tyto.cpython-311.pyc b/src/var/lib/tyto/program/__pycache__/tyto.cpython-311.pyc
index 32be386..4807808 100644
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diff --git a/src/var/lib/tyto/program/args.py b/src/var/lib/tyto/program/args.py
index f6cc65c..39b9730 100644
--- a/src/var/lib/tyto/program/args.py
+++ b/src/var/lib/tyto/program/args.py
@@ -49,10 +49,13 @@ def get_action():
 # Target arguments #
 #------------------#
 def get_target():
-  global target
+  global target, multiple
   try:    target = sys.argv[2]
   except: target = ""
 
+  multiple = False
+  if target == "all": multiple = True
+
 
 #================================#
 # Searching options in arguments #
diff --git a/src/var/lib/tyto/program/check.py b/src/var/lib/tyto/program/check.py
index cac1d5f..6cbabc6 100644
--- a/src/var/lib/tyto/program/check.py
+++ b/src/var/lib/tyto/program/check.py
@@ -33,7 +33,19 @@
 #--------------------------
 
 import sys
-import domain, langs, debug, post, tools
+import args, domain, langs, debug, post, tools
+
+
+#=====================================#
+# Check domain                        #
+# Load domain configuration file      #
+# Update it if needed, and set values #
+# Load website lang                   #
+# Domain must be activated            #
+#-------------------------------------#
+def ready():
+  domain.cf_update_values(False)
+  domain.ready()
 
 
 #===========================================#
@@ -42,9 +54,42 @@ import domain, langs, debug, post, tools
 # Create user work domain directories       #
 #-------------------------------------------#
 def manage(action, target):    
-  # Load configuration and website lang
-  domain.cf_update_values(False)
-  domain.ready()
-  
-  target.endswith(".tyto") and post.is_article(target)
+  # target is "all"
+  if args.multiple:
+    multiple_targets
+    return
+
+  # target is not "all"
+  ready()
+  if target.endswith(".tyto"):
+    is_article(target)
+
+
+#================================#
+# Check article(S)               #
+# Also used with multiple (loop) #
+#--------------------------------#
+def is_article(target):
+  if not post.is_article(target):
+    if args.multiple:
+      return # Let other articles pass
+    
+    sys.exit(post.error)
+
+  header_contents()
+
+
+#===========================================#
+# # Create a loop to get all .tyto articles #
+#-------------------------------------------#
+def multiple_targets():
+  ready()
   
+
+#=======================#
+# check header contents #
+#-----------------------#
+def header_contents():
+  print("check: uri_db =", post.cf_uri, post.wrk_id)
+  print("wrk_target", post.wrk_target)
+  print(post.head_contents, post.text_contents)
diff --git a/src/var/lib/tyto/program/post.py b/src/var/lib/tyto/program/post.py
index 6bd45f8..0c809cf 100644
--- a/src/var/lib/tyto/program/post.py
+++ b/src/var/lib/tyto/program/post.py
@@ -36,6 +36,8 @@ import os, configparser
 import domain, debug, tools, tyto
 
 
+error = 0
+
 #============================================#
 # Check if current directory is in articles/ #
 # Check if article from target exists        #
@@ -44,33 +46,85 @@ import domain, debug, tools, tyto
 #--------------------------------------------#
 def is_article(target):
   # User MUST be in articles/
-  (os.getcwd() + "/").startswith(domain.wrk_articles) or \
-  debug.out(2, "-> articles/", domain.cf_usr_articles, True, 2, True)
+  domain.user_dir.startswith(domain.wrk_articles) or \
+  debug.out(2, "-> articles/", domain.wrk_articles, True, 2, True)
+
+  global error
 
   # Target URI most be from legacy directory or not begins with
   if target.startswith(tyto.notarget):
-    debug.out(20, "./, ../", target, True, 2, True)
+    debug.out(20, "./, ../", target, True, 2, False)
+    error = 20
+    return False
   
   # Article exists
   global uri
   uri = os.path.join(domain.wrk_articles, target)
-  os.path.exists(uri) or debug.out(5, "False", uri, True, 2, True)
+  if not os.path.exists(uri):
+    debug.out(5, "False", uri, True, 2, False)
+    error = 5
+    return False
   
   # Article is a Tyto format and not empty (exit on errors)
-  is_tyto_format()
+  if not is_tyto_format():
+    return False
   
-  #
-  global uri_id, cf_uri
-  
-  # Set post ID from URI
-  uri_id = tools.get_filesum(uri, False)
+  global uri_id, wrk_id, cf_uri, wrk_target
+  # Set post ID from...
+  uri_id = tools.get_filesum(uri, False) # ...URI
+  wrk_id = tools.get_filesum(uri, True)  # ...CONTENTS
   
   # Set post configuration file database
   cf_uri = os.path.join(domain.wrk_db, uri_id + ".ini")
   
+  # Set target from articles/
+  wrk_target = uri.rsplit(domain.wrk_articles)[1]
+  
   # Load Database
   db = cf_load() # True or False
   
+  return True
+
+
+#=========================================#
+# Article is in Tyto format and not empty #
+# Return True or False                    #
+#-----------------------------------------#
+def is_tyto_format():
+  global head_contents, text_contents, error
+
+  separator = False
+  head_contents = text_contents = ""
+
+  with open(uri, "r") as contents:
+    contents = contents.read()
+    for line in contents.rsplit("\n"):
+      if not line:
+        continue
+      
+      if line.startswith(tyto.post_sep):
+        separator = True
+        continue
+      
+      if separator: text_contents = "%s%s\n"%(text_contents, line)
+      else:         head_contents = "%s%s\n"%(head_contents, line) 
+  
+  if not separator:
+    debug.out(21, tyto.post_sep, uri, True, 2, False)
+    error = 21
+    return False
+  
+  if not head_contents:
+    debug.out(22, "?", uri, True, 2, False)
+    error = 22
+    return False
+  
+  if not text_contents:
+    debug.out(23, "?", uri, True, 2, False)
+    error = 23
+    return False
+  
+  return True
 
 
 #=======================================#
@@ -78,10 +132,12 @@ def is_article(target):
 # return True, or False if unused (yet) #
 #---------------------------------------#
 def cf_load():
+  global cf
+  cf = False
+
   if not os.path.exists(cf_uri):
     return False
   
-  global cf
   cf = configparser.ConfigParser()
   cf.read(cf_uri)
   
@@ -100,29 +156,3 @@ def cf_valid():
 
   print("post: chk_hash", chk_hash)
 
-
-#=========================================#
-# Article is in Tyto format and not empty #
-#-----------------------------------------#
-def is_tyto_format():
-  global uri, header_contents, writer_contents
-  
-  separator = False
-  head_contents = text_contents = ""
-
-  with open(uri, "r") as contents:
-    contents = contents.read()
-    for line in contents.rsplit("\n"):
-      if not line:
-        continue
-      
-      if line.startswith(tyto.post_sep):
-        separator = True
-        continue
-      
-      if separator: text_contents = "%s%s\n"%(text_contents, line)
-      else:         head_contents = "%s%s\n"%(head_contents, line) 
-  
-  separator     or debug.out(21, tyto.post_sep, uri, True, 2, True)
-  head_contents or debug.out(22, "?", uri, True, 2, True)
-  text_contents or debug.out(23, "?", uri, True, 2, True)
diff --git a/src/var/lib/tyto/program/tyto.py b/src/var/lib/tyto/program/tyto.py
index 1bcc1c0..d06818f 100644
--- a/src/var/lib/tyto/program/tyto.py
+++ b/src/var/lib/tyto/program/tyto.py
@@ -40,6 +40,7 @@ targets = (
            "domain",
            "domains",
            "title", "date", "about", "mail", "tags", "lang", "server",
+           "all",
           )
 
 force_options = ("--force", "-F")