diff --git a/by_json/commons.sh b/by_json/commons.sh
index 03ac147..f177875 100644
--- a/by_json/commons.sh
+++ b/by_json/commons.sh
@@ -12,6 +12,14 @@ tmpl_gizmo="templates/gizmo.tmpl" # A colored polygon. Represents an entity.
 tmpl_link="templates/link.tmpl"   # A link between two entities.
 tmpl_label="templates/label_default.tmpl" # Default label for entities.
 
+# pastel colors (Cf. https://www.color-hex.com/color-palette/5361)
+COLOR1="#ffb3ba"
+COLOR2="#ffdfba"
+COLOR3="#ffffba"
+COLOR4="#baffc9"
+COLOR5="#bae1ff"
+COMP_COLOR4="#ffd8ba"
+
 # Graph info
 rankdir="RL"
 title=""
diff --git a/by_json/gen_orgas.sh b/by_json/gen_orgas.sh
index 8c2dbe3..a206643 100755
--- a/by_json/gen_orgas.sh
+++ b/by_json/gen_orgas.sh
@@ -1,10 +1,10 @@
 #!/usr/bin/env bash
 #
-# Generate a dot file to create graph of RERO-ils data (orga, lib and users)
+# Generate a dot file to create graph of RERO-ils data
 #
 
 # Usage:
-#    bash gen.sh output.dot
+#    bash gen_orgas.sh output.dot
 # where `output.dot` is the output file that permit to generate a graph.
 # To generate the graph:
 #    dot -Tsvg output.dot -o organisations.svg
@@ -12,18 +12,6 @@
 
 # CONFIG
 RERO_DIR="${HOME}/projets/rero/rero-ils"
-# pastel colors (Cf. https://www.color-hex.com/color-palette/5361)
-COLOR1="#ffb3ba"
-COLOR2="#ffdfba"
-COLOR3="#ffffba"
-COLOR4="#baffc9"
-COLOR5="#bae1ff"
-COMP_COLOR4="#ffd8ba"
-# colors you choose for different objects
-ORGA_COLOR="${COLOR1}"    # organisations
-LIB_COLOR="${COLOR2}"     # libraries
-PT_COLOR="${COLOR3}"      # patron_types
-USER_COLOR="${COLOR5}"    # users/patrons
 
 # Load commons variables, functions and statements
 source commons.sh
@@ -33,110 +21,16 @@ title="Link between organisations, libraries and users."
 save "templates/header.tmpl"
 
 # ORGANISATIONS
-shape="box"
-color="${ORGA_COLOR}"
-while read -r orga
-do
-  # take important info
-  pid=$(echo $orga|jq -r .pid)
-  code=$(echo $orga|jq -r .code)
-  name=$(echo $orga|jq -r .name)
-  # write result in output
-  identifier="Orga${pid}"
-  label="$(render ${tmpl_label})"
-  save "${tmpl_gizmo}"
-done <<< $(parse_json "organisations")
+source process_orgas.sh
 
 # LIBRARIES
-shape="house"
-color="${LIB_COLOR}"
-while read -r lib
-do
-  pid=$(echo $lib|jq -r .pid)
-  name=$(echo $lib|jq -r .name)
-  code=$(echo $lib|jq -r .code)
-  orga=$(echo $lib|jq -r .organisation)
-  orga_pid=$(echo $orga|rev|cut -d "/" -f 1|rev)
-  # write result in output
-  identifier="Lib${pid}"
-  label="$(render ${tmpl_label})"
-  save "${tmpl_gizmo}"
-  relation="Orga${orga_pid}"
-  save "${tmpl_link}"
-done <<< $(parse_json "libraries")
+source process_lib.sh
 
 # PATRON_TYPES
-shape="polygon"
-color="${PT_COLOR}"
-additionals="sides=7"
-while read pt
-do
-  pid=$(echo $pt|jq -r .pid)
-  name=$(echo $pt|jq -r .name)
-  orga=$(echo $pt|jq -r .organisation)
-  # write result in output
-  identifier="Type${pid}"
-  label="$(render templates/label_patron_types.tmpl)"
-  save "${tmpl_gizmo}"
-
-  # Make a link with organisation if present
-  if [[ -n "${orga}" ]]; then
-    orga_pid=$(echo $orga|rev|cut -d "/" -f 1|rev)
-    relation="Orga${orga_pid}"
-    save "${tmpl_link}"
-  fi
-done <<< $(parse_json "patron_types")
+source process_pt.sh
 
 # USERS
-shape="ellipse"
-additionals=''
-color="${USER_COLOR}"
-while read user
-do
-  email=$(echo $user|jq -r .email)
-  first_name=$(echo $user|jq -r .first_name)
-  last_name=$(echo $user|jq -r .last_name)
-  barcode=$(echo $user|jq -r .barcode)
-  roles=$(echo $user|jq -r .roles[])
-  library=$(echo $user|jq -r .library)
-  library_pid=$(echo $library|rev|cut -d "/" -f 1|rev)
-  pt=$(echo $user|jq -r .pt)
-
-  # Prepare additional info
-  if [[ "${roles}" != "null" ]]; then
-    displayed_roles="roles: "
-    for role in ${roles}; do
-      displayed_roles="${displayed_roles}<font color='red' >${role}</font>, "
-    done
-  fi
-  # Don't display barcode if no one
-  info=""
-  if [[ "${barcode}" != "null" ]]; then
-    info="${info}<br/>${barcode}"
-  fi
-  # Same for roles
-  if [[ -n "${displayed_roles}" ]]; then
-    info="${info}<br/>${displayed_roles}"
-  fi
-
-  # write result in output
-  identifier="User_${email}"
-  label="$(render templates/label_users.tmpl)"
-  save "${tmpl_gizmo}"
-
-  # Display a link if library_pid is not null
-  if [[ "${library_pid}" != "null" ]]; then
-    relation="Lib${library_pid}"
-    save "${tmpl_link}"
-  fi
-
-  # Display a link if patron_type is not null
-  if [[ "$pt" != "null" ]]; then
-    pt_id=$(echo $pt|rev| cut -d "/" -f 1|rev)
-    relation="Type${pt_id}"
-    save "${tmpl_link}"
-  fi
-done <<< $(parse_json "users")
+source process_users.sh
 
 # Graph footer
 save "templates/footer.tmpl"
diff --git a/by_json/process_lib.sh b/by_json/process_lib.sh
new file mode 100644
index 0000000..b28caca
--- /dev/null
+++ b/by_json/process_lib.sh
@@ -0,0 +1,22 @@
+# DEPENDS ON: Organisations (process_orgas.sh)
+
+# Colors
+LIB_COLOR="${COLOR2}"     # libraries
+
+# Main configuration
+shape="house"
+color="${LIB_COLOR}"
+while read -r lib
+do
+  pid=$(echo $lib|jq -r .pid)
+  name=$(echo $lib|jq -r .name)
+  code=$(echo $lib|jq -r .code)
+  orga=$(echo $lib|jq -r .organisation)
+  orga_pid=$(echo $orga|rev|cut -d "/" -f 1|rev)
+  # write result in output
+  identifier="Lib${pid}"
+  label="$(render ${tmpl_label})"
+  save "${tmpl_gizmo}"
+  relation="Orga${orga_pid}"
+  save "${tmpl_link}"
+done <<< $(parse_json "libraries")
diff --git a/by_json/process_orgas.sh b/by_json/process_orgas.sh
new file mode 100644
index 0000000..75e559e
--- /dev/null
+++ b/by_json/process_orgas.sh
@@ -0,0 +1,19 @@
+# DEPENDS ON: None
+
+# Colors
+ORGA_COLOR="${COLOR1}"    # organisations
+
+# Main configuration
+shape="box"
+color="${ORGA_COLOR}"
+while read -r orga
+do
+  # take important info
+  pid=$(echo $orga|jq -r .pid)
+  code=$(echo $orga|jq -r .code)
+  name=$(echo $orga|jq -r .name)
+  # write result in output
+  identifier="Orga${pid}"
+  label="$(render ${tmpl_label})"
+  save "${tmpl_gizmo}"
+done <<< $(parse_json "organisations")
diff --git a/by_json/process_pt.sh b/by_json/process_pt.sh
new file mode 100644
index 0000000..f708f97
--- /dev/null
+++ b/by_json/process_pt.sh
@@ -0,0 +1,26 @@
+# DEPENDS ON: Organisations (process_orgas.sh)
+
+# Colors
+PT_COLOR="${COLOR3}"      # patron_types
+
+# Main configuration
+shape="polygon"
+color="${PT_COLOR}"
+additionals="sides=7"
+while read pt
+do
+  pid=$(echo $pt|jq -r .pid)
+  name=$(echo $pt|jq -r .name)
+  orga=$(echo $pt|jq -r .organisation)
+  # write result in output
+  identifier="Type${pid}"
+  label="$(render templates/label_patron_types.tmpl)"
+  save "${tmpl_gizmo}"
+
+  # Make a link with organisation if present
+  if [[ -n "${orga}" ]]; then
+    orga_pid=$(echo $orga|rev|cut -d "/" -f 1|rev)
+    relation="Orga${orga_pid}"
+    save "${tmpl_link}"
+  fi
+done <<< $(parse_json "patron_types")
diff --git a/by_json/process_users.sh b/by_json/process_users.sh
new file mode 100644
index 0000000..001d22f
--- /dev/null
+++ b/by_json/process_users.sh
@@ -0,0 +1,55 @@
+# DEPENDS ON: Patron types (process_pt.sh), Library (process_lib.sh)
+
+# Colors
+USER_COLOR="${COLOR5}"    # users/patrons
+
+# Main configuration
+shape="ellipse"
+additionals=''
+color="${USER_COLOR}"
+while read user
+do
+  email=$(echo $user|jq -r .email)
+  first_name=$(echo $user|jq -r .first_name)
+  last_name=$(echo $user|jq -r .last_name)
+  barcode=$(echo $user|jq -r .barcode)
+  roles=$(echo $user|jq -r .roles[])
+  library=$(echo $user|jq -r .library)
+  library_pid=$(echo $library|rev|cut -d "/" -f 1|rev)
+  pt=$(echo $user|jq -r .pt)
+
+  # Prepare additional info
+  if [[ "${roles}" != "null" ]]; then
+    displayed_roles="roles: "
+    for role in ${roles}; do
+      displayed_roles="${displayed_roles}<font color='red' >${role}</font>, "
+    done
+  fi
+  # Don't display barcode if no one
+  info=""
+  if [[ "${barcode}" != "null" ]]; then
+    info="${info}<br/>${barcode}"
+  fi
+  # Same for roles
+  if [[ -n "${displayed_roles}" ]]; then
+    info="${info}<br/>${displayed_roles}"
+  fi
+
+  # write result in output
+  identifier="User_${email}"
+  label="$(render templates/label_users.tmpl)"
+  save "${tmpl_gizmo}"
+
+  # Display a link if library_pid is not null
+  if [[ "${library_pid}" != "null" ]]; then
+    relation="Lib${library_pid}"
+    save "${tmpl_link}"
+  fi
+
+  # Display a link if patron_type is not null
+  if [[ "$pt" != "null" ]]; then
+    pt_id=$(echo $pt|rev| cut -d "/" -f 1|rev)
+    relation="Type${pt_id}"
+    save "${tmpl_link}"
+  fi
+done <<< $(parse_json "users")