diff --git a/doc/examples/example_conditional.tum b/doc/examples/example_conditional.tum
index fd3664c..7aaadf6 100644
--- a/doc/examples/example_conditional.tum
+++ b/doc/examples/example_conditional.tum
@@ -10,12 +10,12 @@ main:
 
             - let:
                 name: Set test variables for Linux
-                condition: $| "$(os)" == "Linux" |
+                condition: <| "$(os)" == "Linux" |>
                 values:
                     - terminal_prompt: $(linux_prompt)
             - let:
                 name: Set test variables for Windows
-                condition: $| "$(os)" == "Windows" |
+                condition: <| "$(os)" == "Windows" |>
                 values:
                     - terminal_prompt: $(windows_prompt)
 
@@ -35,17 +35,17 @@ main:
                     no_fail: True
 
             exit_condition:
-                value: $| "$(last_test_result)" == "PASS" |
+                value: <| "$(last_test_result)" == "PASS" |>
 
 
         - let:
             name: let
             values:
-                - conditional_exec: $| random.randint(1, 4) |
+                - conditional_exec: <| random.randint(1, 4) |>
 
         - console:
             name: Console creation
-            condition: $| $(conditional_exec) == 1 |
+            condition: <| $(conditional_exec) == 1 |>
             console_name: consname
             doc: Opening the console
             steps:
@@ -55,56 +55,56 @@ main:
 
         - console:
             name: Console read_until with timeout
-            condition: $| $(conditional_exec) == 1 |
+            condition: <| $(conditional_exec) == 1 |>
             console_name: consname
             steps:
                 - read_until: {expected: "$(terminal_prompt)", timeout: 10}
 
         - console:
             name: Console write
-            condition: $| $(conditional_exec) == 1 |
+            condition: <| $(conditional_exec) == 1 |>
             console_name: consname
             steps:
                 - writeln: echo 0
 
         - sleep:
             name: sleep item
-            condition: $| $(conditional_exec) == 1 |
+            condition: <| $(conditional_exec) == 1 |>
             timeout: 5
 
         - console:
             name: Console read_until immediate
-            condition: $| $(conditional_exec) == 1 |
+            condition: <| $(conditional_exec) == 1 |>
             console_name: consname
             steps:
                 - read_until: {expected: "0", timeout: 0}
 
         - console:
             name: Console read_until immediate (2)
-            condition: $| $(conditional_exec) == 1 |
+            condition: <| $(conditional_exec) == 1 |>
             console_name: consname
             steps:
                 - read_until: {expected: "$(terminal_prompt)", timeout: 0}
 
         - console:
             name: Console closure
-            condition: $| $(conditional_exec) == 1 |
+            condition: <| $(conditional_exec) == 1 |>
             console_name: consname
             steps:
                 - close: consname
 
         - sleep:
             name: sleep item
-            condition: $| $(conditional_exec) == 2 |
+            condition: <| $(conditional_exec) == 2 |>
             timeout: 5
 
         - dialog_image:
             name: dialog image item
-            condition: $| $(conditional_exec) == 3 |
+            condition: <| $(conditional_exec) == 3 |>
             question: click ok if you see the image
             filename: image.jpg
 
         - dialog_value:
             name: dialog_value item
-            condition: $| $(conditional_exec) == 4 |
+            condition: <| $(conditional_exec) == 4 |>
             question: enter something and click ok
\ No newline at end of file
diff --git a/doc/examples/example_cycle.tum b/doc/examples/example_cycle.tum
index e7b18f8..6d068ae 100644
--- a/doc/examples/example_cycle.tum
+++ b/doc/examples/example_cycle.tum
@@ -139,7 +139,7 @@ main:
               timeout: 0.2
               dialog: false
         exit_condition:
-            value: $| $(variable) >= 10 |
+            value: <| $(variable) >= 10 |>
 
 # This loop must fail du to an exception in exit condition.
     - loop:
diff --git a/doc/examples/example_items.tum b/doc/examples/example_items.tum
index 9b367f2..5a5fd90 100644
--- a/doc/examples/example_items.tum
+++ b/doc/examples/example_items.tum
@@ -16,7 +16,7 @@ main:
 
         - group:
             name: Set test variables for Linux
-            condition: $| "$(os)" == "Linux" |
+            condition: <| "$(os)" == "Linux" |>
             steps:
 
             - let:
@@ -26,7 +26,7 @@ main:
 
         - group:
             name: Set test variables for Windows
-            condition: $| "$(os)" == "Windows" |
+            condition: <| "$(os)" == "Windows" |>
             steps:
 
             - let:
diff --git a/doc/examples/example_sequence.tum b/doc/examples/example_sequence.tum
index 8deb2d1..eb6f4a3 100644
--- a/doc/examples/example_sequence.tum
+++ b/doc/examples/example_sequence.tum
@@ -22,6 +22,6 @@ main:
                 - *seq_sleep
 
             exit_condition:
-                value: $| $(variable) >= 3 |
+                value: <| $(variable) >= 3 |>
 
         - !include {file: seq2.tum, is_dialog: True, sleep_timeout: 12, func_para: truc}
\ No newline at end of file
diff --git a/doc/examples/example_simple.tum b/doc/examples/example_simple.tum
index f4a439e..201c733 100644
--- a/doc/examples/example_simple.tum
+++ b/doc/examples/example_simple.tum
@@ -23,5 +23,5 @@ main:
       - sleep:
           name: sleep item
           dialog: true
-          timeout: $| 3600 + random.randint(1, 10) |
+          timeout: <| 3600 + random.randint(1, 10) |>
           no_fail: true
diff --git a/doc/examples/example_text_manip.tum b/doc/examples/example_text_manip.tum
index 9619119..8793447 100644
--- a/doc/examples/example_text_manip.tum
+++ b/doc/examples/example_text_manip.tum
@@ -21,9 +21,9 @@ main:
         - let:
             name: Extract data
             values:
-                - text_extract: $| [l for l in '''$(rand_text)'''.splitlines() if '$(text_searched)' in l][0] |
+                - text_extract: <| [l for l in '''$(rand_text)'''.splitlines() if '$(text_searched)' in l][0] |>
 
         - dialog_message:
-            condition: $| len('$(text_extract)') > 0 |
+            condition: <| len('$(text_extract)') > 0 |>
             name: dialog value test item
             question: Tataaaaa !
\ No newline at end of file
diff --git a/doc/manual/sphinx/source/test_items/group_test_item.rst b/doc/manual/sphinx/source/test_items/group_test_item.rst
index af74fb7..3af307d 100644
--- a/doc/manual/sphinx/source/test_items/group_test_item.rst
+++ b/doc/manual/sphinx/source/test_items/group_test_item.rst
@@ -8,7 +8,7 @@ This element is of the following form:
 
     - group:
         name: Group Item
-        condition: $| "$(OS)" == "Linux" |
+        condition: <| "$(OS)" == "Linux" |>
         steps:
             - unittest_file:
                 test_file: test_prod_alpha_13.py
diff --git a/doc/manual/sphinx/source/test_items/items_common_attributes.rst b/doc/manual/sphinx/source/test_items/items_common_attributes.rst
index 11b5358..b9c2f15 100644
--- a/doc/manual/sphinx/source/test_items/items_common_attributes.rst
+++ b/doc/manual/sphinx/source/test_items/items_common_attributes.rst
@@ -196,8 +196,8 @@ Export attribute
         key:
             - GID-1510554_step_1
         report:
-            reported_list: $| random.sample(range(0,20), k=10) |
-            reported_float: $| math.sqrt(float(1)) |
+            reported_list: <| random.sample(range(0,20), k=10) |>
+            reported_float: <| math.sqrt(float(1)) |>
             reported_str: This is my reported sentence
 
 
diff --git a/doc/manual/sphinx/source/test_items/let_test_item.rst b/doc/manual/sphinx/source/test_items/let_test_item.rst
index 4ffd38e..f896259 100644
--- a/doc/manual/sphinx/source/test_items/let_test_item.rst
+++ b/doc/manual/sphinx/source/test_items/let_test_item.rst
@@ -11,7 +11,7 @@ This element is of the following form:
         values:
             key1: value1
             key2: value2
-            key3: $| $(variable)[$(loop_index)] |
+            key3: <| $(variable)[$(loop_index)] |>
 
 The ``let`` element is used to set values in the global directory.
 
diff --git a/doc/manual/sphinx/source/tum_syntax.rst b/doc/manual/sphinx/source/tum_syntax.rst
index e039a9b..4cecc6b 100644
--- a/doc/manual/sphinx/source/tum_syntax.rst
+++ b/doc/manual/sphinx/source/tum_syntax.rst
@@ -63,7 +63,7 @@ The parameter file can be specified in the `.tum` file root:
 
     parameter1: value1
     parameter2: 1234
-    parameter3: $| 12.34 * 2 |
+    parameter3: <| 12.34 * 2 |>
     parameter4:
         - $(parameter1)
         - $(parameter3)
@@ -205,7 +205,7 @@ The variable substitution is recursive and checks all the occurrences of the
 ``$(x)`` pattern in a string.
 
 It is also possible to perform evaluation of python substrings during parameters passing.
-It is done by using the ``$| expr |`` pattern in a string.
+It is done by using the ``<| expr |>`` pattern in a string.
 `expr` may then be a correct python expression.
 
 Below are illustrated simple and more complicated cases of expansion and evaluation depending on
@@ -218,10 +218,10 @@ their pattern.
         name: Dynamic variables expansion
         key: $(test)_PASS
         values:
-            - expanse_select: $|"$(expanse_select)".replace("o", "a")|
+            - expanse_select: <|"$(expanse_select)".replace("o", "a")|>
             - expanse_index: $(expanse_index_$(expanse_select))
             - expanse_table: $(expanse_table_$(expanse_select))
-            - expanse_eval: $|$(expanse_index) == 1|
+            - expanse_eval: <|$(expanse_index) == 1|>
 
 Test Items
 --------------------
diff --git a/doc/manual/testium_manual.pdf b/doc/manual/testium_manual.pdf
index 82a1223..eb9a886 100644
Binary files a/doc/manual/testium_manual.pdf and b/doc/manual/testium_manual.pdf differ
diff --git a/src/testium/interpreter/utils/params.py b/src/testium/interpreter/utils/params.py
index 0564c48..d8c22a1 100644
--- a/src/testium/interpreter/utils/params.py
+++ b/src/testium/interpreter/utils/params.py
@@ -307,13 +307,13 @@ def _preprocess_string(value, parent=None):
 
 def _eval_param(value):
     """This function parses a string value to check if patterns corresponding
-    to $|xxx| exists.
+    to <|xxx|> exists.
     When this kind of pattern is found, an attempt to evaluate its
     content is done.
     If it is not evaluable, not replaced.
     """
     global glob_eval_func
-    return _parse_and_process("$|", "|", value, glob_eval_func)
+    return _parse_and_process("<|", "|>", value, glob_eval_func)
 
 
 def _process_recursively(func, param_value, *fparams):
diff --git a/test/validation/items/check/test.tum b/test/validation/items/check/test.tum
index f9c7bd3..346b8da 100644
--- a/test/validation/items/check/test.tum
+++ b/test/validation/items/check/test.tum
@@ -19,10 +19,10 @@
     name: Check condition on existing variable (PASS)
     key: $(test)_PASS
     values:
-        - $| $(pfn_Dummy_int) > 1 |
+        - <| $(pfn_Dummy_int) > 1 |>
 
 - check:
     name: Check condition on existing variable (FAIL)
     key: $(test)_FAIL
     values:
-        - $| "tailor" in "$(pfn_Dummy_str)" |
\ No newline at end of file
+        - <| "tailor" in "$(pfn_Dummy_str)" |>
\ No newline at end of file
diff --git a/test/validation/items/common/conditional/test.tum b/test/validation/items/common/conditional/test.tum
index 9dcd2e7..571f567 100644
--- a/test/validation/items/common/conditional/test.tum
+++ b/test/validation/items/common/conditional/test.tum
@@ -16,17 +16,17 @@
                 - $(loop_param)
 
     exit_condition:
-        value: $| $(pfn_Echo function) > 3 |
+        value: <| $(pfn_Echo function) > 3 |>
 
 - let:
     name: let
     key: $(test)_PASS
     values:
-        - conditional_exec: $| random.randint(1, 2) |
+        - conditional_exec: <| random.randint(1, 2) |>
 
 - console:
     name: Console creation
-    condition: $| $(conditional_exec) == 1 |
+    condition: <| $(conditional_exec) == 1 |>
     console_name: consname
     doc: Opening the console
     key: $(test)_PASS
@@ -34,18 +34,19 @@
         - open:
             protocol: terminal
             terminal_path: $(test_directory)
+        - writeln: echo "terminal loaded"
 
 - console:
     name: Console read_until with timeout
-    condition: $| $(conditional_exec) == 1 |
+    condition: <| $(conditional_exec) == 1 |>
     console_name: consname
     key: $(test)_PASS
     steps:
-        - read_until: {expected: "$(terminal_prompt)", timeout: 10}
+        - read_until: {expected: terminal loaded, timeout: 5}
 
 - console:
     name: Console write
-    condition: $| $(conditional_exec) == 1 |
+    condition: <| $(conditional_exec) == 1 |>
     console_name: consname
     key: $(test)_PASS
     steps:
@@ -53,12 +54,12 @@
 
 - sleep:
     name: sleep item
-    condition: $| $(conditional_exec) == 1 |
+    condition: <| $(conditional_exec) == 1 |>
     timeout: 1
 
 - console:
     name: Console read_until immediate
-    condition: $| $(conditional_exec) == 1 |
+    condition: <| $(conditional_exec) == 1 |>
     console_name: consname
     key: $(test)_PASS
     steps:
@@ -66,7 +67,7 @@
 
 - console:
     name: Console read_until immediate (2)
-    condition: $| $(conditional_exec) == 1 |
+    condition: <| $(conditional_exec) == 1 |>
     console_name: consname
     key: $(test)_PASS
     steps:
@@ -74,7 +75,7 @@
 
 - console:
     name: Console closure
-    condition: $| $(conditional_exec) == 1 |
+    condition: <| $(conditional_exec) == 1 |>
     console_name: consname
     key: $(test)_PASS
     steps:
@@ -82,5 +83,5 @@
 
 - sleep:
     name: sleep item
-    condition: $| $(conditional_exec) == 2 |
+    condition: <| $(conditional_exec) == 2 |>
     timeout: 1
diff --git a/test/validation/items/common/results/test.tum b/test/validation/items/common/results/test.tum
index 007ee12..fb17fbe 100644
--- a/test/validation/items/common/results/test.tum
+++ b/test/validation/items/common/results/test.tum
@@ -138,7 +138,7 @@
 
         - py_func:
             name: Return True expect False but no_fail expansed
-            no_fail: $| bool(0) == False |
+            no_fail: <| bool(0) == False |>
             key: $(test)_PASS
             file: $(test_path)$(psep)results$(psep)results.py
             func_name: echo
@@ -147,7 +147,7 @@
 
         - py_func:
             name: Return True expect False but no_fail expansed (must fail)
-            no_fail: $| bool(1) == False |
+            no_fail: <| bool(1) == False |>
             key: $(test)_FAIL
             file: $(test_path)$(psep)results$(psep)results.py
             func_name: echo
diff --git a/test/validation/items/expanse/param.yaml b/test/validation/items/expanse/param.yaml
index f3a3d8f..8614575 100644
--- a/test/validation/items/expanse/param.yaml
+++ b/test/validation/items/expanse/param.yaml
@@ -9,4 +9,4 @@ expanse_index_blo: 1
 expanse_index: $(expanse_index_$(expanse_select))
 expanse_table: $(expanse_table_$(expanse_select))
 
-expanse_eval: $|$(expanse_index) == 1|
+expanse_eval: <|$(expanse_index) == 1|>
diff --git a/test/validation/items/expanse/test.tum b/test/validation/items/expanse/test.tum
index b8bd816..ae0c0cc 100644
--- a/test/validation/items/expanse/test.tum
+++ b/test/validation/items/expanse/test.tum
@@ -2,26 +2,26 @@
     name: Check variables expansion is correct (PASS)
     key: $(test)_PASS
     values:
-      - $(expanse_index) == 1
-      - $(expanse_table)[$(expanse_index)] == 9012
-      - $(expanse_eval) == True
+      - <| $(expanse_index) == 1 |>
+      - <| $(expanse_table)[$(expanse_index)] == 9012 |>
+      - <| $(expanse_eval) == True |>
 
 - let:
     name: Dynamic variables expansion
     key: $(test)_PASS
     values:
-      - expanse_select: $|"$(expanse_select)".replace("o", "a")|
+      - expanse_select: <|"$(expanse_select)".replace("o", "a")|>
       - expanse_index: $(expanse_index_$(expanse_select))
       - expanse_table: $(expanse_table_$(expanse_select))
-      - expanse_eval: $|$(expanse_index) == 1|
+      - expanse_eval: <|$(expanse_index) == 1|>
 
 - check:
     name: Check variables expansion is correct (PASS)
     key: $(test)_PASS
     values:
-      - $(expanse_index) == 0
-      - $(expanse_table)[$(expanse_index)] == "abcd"
-      - $(expanse_eval) == False
+      - <| $(expanse_index) == 0 |>
+      - <| $(expanse_table)[$(expanse_index)] == "abcd" |>
+      - <| $(expanse_eval) == False |>
 
 - let:
     name: Complex variables expansion
@@ -33,13 +33,13 @@
       - var4: blo
       - expanse_var_bla: 3
       - expanse_blo_var: 5
-      - expanse_complex: $|$|$(expanse_$(var2)_$(var3))*6| + $|4*$($(var1)_$(var4)_$(var2))||
+      - expanse_complex: <|<|$(expanse_$(var2)_$(var3))*6|> + <|4*$($(var1)_$(var4)_$(var2))|>|>
 
 - check:
     name: Check complex variables expansion is correct (PASS)
     key: $(test)_PASS
     values:
-      - $| $(expanse_complex) == 38 |
+      - <| $(expanse_complex) == 38 |>
 
 - let:
     name: Variables expansion in object
@@ -50,10 +50,10 @@
       - expanse_var_2: 6
       - expanse_object:
           [
-            { a: $(expanse_var_2), $(expanse_key): $|2**3| },
+            { a: $(expanse_var_2), $(expanse_key): <|2**3|> },
             {
-              '$|"bla".replace("a", "o")|':
-                [$|$(expanse_var)*$(expanse_var_2)|, 25],
+              '<|"bla".replace("a", "o")|>':
+                [<|$(expanse_var)*$(expanse_var_2)|>, 25],
             },
           ]
 
@@ -61,4 +61,4 @@
     name: Check complex variables expansion is correct (PASS)
     key: $(test)_PASS
     values:
-      - '$| $(expanse_object) == [{"a": 6, "b": 8}, {"blo": [18, 25]}] |'
+      - '<| $(expanse_object) == [{"a": 6, "b": 8}, {"blo": [18, 25]}] |>'
diff --git a/test/validation/items/jsonrpc/test.tum b/test/validation/items/jsonrpc/test.tum
index 87c0d1b..1eba894 100644
--- a/test/validation/items/jsonrpc/test.tum
+++ b/test/validation/items/jsonrpc/test.tum
@@ -13,7 +13,7 @@
 
 - group:
     name: jsonrpc tests
-    condition: $| '/jrpces' in r'''$(cn_json rpc echo server)''' |
+    condition: <| '/jrpces' in r'''$(cn_json rpc echo server)''' |>
     steps:
         - console:
             name: Start the json rpc echo server
diff --git a/test/validation/items/let/test.tum b/test/validation/items/let/test.tum
index 08c6a41..83d4252 100644
--- a/test/validation/items/let/test.tum
+++ b/test/validation/items/let/test.tum
@@ -12,7 +12,7 @@
             name:  Let it be
             values:
                 it: $(loop_param)
-                be: $| $(loop_param) == $(it) |
+                be: <| $(loop_param) == $(it) |>
 
 - loop:
     name: Cycle iterating on list
@@ -30,7 +30,7 @@
             name:  Let it be
             values:
                 - it: $(loop_param)
-                - be: $| $(loop_param) == $(it) |
+                - be: <| $(loop_param) == $(it) |>
 
 - let:
     name:  Get time
@@ -44,7 +44,7 @@
     name:  Get parameter file value
     key: $(test)_PASS
     values:
-        - test_overwrite_me: $| $(overwrite_me) == True |
+        - test_overwrite_me: <| $(overwrite_me) == True |>
 
 - py_func:
     name: Check global dic pass
@@ -84,10 +84,10 @@
     name:  Evaluate Overwriting parameter file value
     key: $(test)_PASS
     values:
-        - test_overwrite_me: $| "$(overwrite_me)" == True |
+        - test_overwrite_me: <| "$(overwrite_me)" == True |>
 
 - check:
     name: Check Overwriting parameter file value
     key: $(test)_PASS
     values:
-        - $(test_overwrite_me) == False
\ No newline at end of file
+        - <| $(test_overwrite_me) == False |>
\ No newline at end of file
diff --git a/test/validation/main.tum b/test/validation/main.tum
index bea81b6..aa15916 100644
--- a/test/validation/main.tum
+++ b/test/validation/main.tum
@@ -13,14 +13,14 @@ main:
 
                 - let:
                     name: Set test variables for Linux
-                    condition: $| "$(os)" == "Linux" |
+                    condition: <| "$(os)" == "Linux" |>
                     values:
                         - terminal_prompt: $(linux_prompt)
                         - psep: "/"
 
                 - let:
                     name: Set test variables for Windows
-                    condition: $| "$(os)" == "Windows" |
+                    condition: <| "$(os)" == "Windows" |>
                     values:
                         - terminal_prompt: $(windows_prompt)
                         - psep: "\\"
diff --git a/test/validation/param.yaml b/test/validation/param.yaml
index 534c4ac..af179f3 100644
--- a/test/validation/param.yaml
+++ b/test/validation/param.yaml
@@ -1,5 +1,5 @@
 # All sub directory in items are evaluated as a list
-items: $| [os.path.basename(f.path) for f in os.scandir(os.path.join(r"$(test_directory)", "items")) if f.is_dir()] |
+items: <| [os.path.basename(f.path) for f in os.scandir(os.path.join(r"$(test_directory)", "items")) if f.is_dir()] |>
   # - common
   # - check
   # - console