diff --git a/concrete_syntax/plantuml.py b/concrete_syntax/plantuml/renderer.py
similarity index 99%
rename from concrete_syntax/plantuml.py
rename to concrete_syntax/plantuml/renderer.py
index b291007..3cdeeac 100644
--- a/concrete_syntax/plantuml.py
+++ b/concrete_syntax/plantuml/renderer.py
@@ -1,3 +1,5 @@
+# PlantUML renderer
+
 from services import scd, od
 from services.bottom.V0 import Bottom
 from transformation import ramify
diff --git a/concrete_syntax/textual_cd/parser.py b/concrete_syntax/textual_cd/parser.py
new file mode 100644
index 0000000..034b523
--- /dev/null
+++ b/concrete_syntax/textual_cd/parser.py
@@ -0,0 +1,28 @@
+grammar = r"""
+%import common.WS_INLINE
+%ignore WS_INLINE
+%ignore COMMENT
+
+%declare _INDENT _DEDENT
+
+?start: (_NL | object )*
+
+IDENTIFIER: /[A-Za-z_][A-Za-z_0-9]*/
+COMMENT: /#.*/
+
+# newline
+_NL: /(\r?\n[\t ]*)+/
+
+literal: INT
+       | STR
+       | BOOL
+
+INT: /[0-9]+/
+STR: /"[^"]*"/
+   | /'[^']*'/
+BOOL: "True" | "False"
+
+object: [IDENTIFIER] ":" IDENTIFIER [link] _NL [_INDENT slot+ _DEDENT]
+link: "(" IDENTIFIER "->" IDENTIFIER ")"
+slot: IDENTIFIER "=" literal _NL
+"""
diff --git a/concrete_syntax/textual_od/parser.py b/concrete_syntax/textual_od/parser.py
index f55f78b..736d64e 100644
--- a/concrete_syntax/textual_od/parser.py
+++ b/concrete_syntax/textual_od/parser.py
@@ -30,8 +30,8 @@ STR: /"[^"]*"/
    | /'[^']*'/
 BOOL: "True" | "False"
 
-object: [IDENTIFIER] ":" IDENTIFIER [link] _NL [_INDENT slot+ _DEDENT]
-link: "(" IDENTIFIER "->" IDENTIFIER ")"
+object: [IDENTIFIER] ":" IDENTIFIER [link_spec] _NL [_INDENT slot+ _DEDENT]
+link_spec: "(" IDENTIFIER "->" IDENTIFIER ")"
 slot: IDENTIFIER "=" literal _NL
 """
 
@@ -75,7 +75,7 @@ def parse_od(state, cs_text, mm):
         def literal(self, el):
             return el[0]
 
-        def link(self, el):
+        def link_spec(self, el):
             [src, tgt] = el
             return (src, tgt)
         
diff --git a/experiments/exp_scd.py b/experiments/exp_scd.py
index c924d2a..c59de90 100644
--- a/experiments/exp_scd.py
+++ b/experiments/exp_scd.py
@@ -11,7 +11,7 @@ from transformation.ramify import ramify
 from transformation import rewriter
 from services.bottom.V0 import Bottom
 from services.primitives.integer_type import Integer
-from concrete_syntax import plantuml
+from concrete_syntax.plantuml import renderer as plantuml
 from concrete_syntax.textual_od import parser, renderer
 
 import sys
@@ -30,6 +30,12 @@ def main():
     int_mm_id = UUID(state.read_value(state.read_dict(state.read_root(), "Integer")))
     string_mm_id = UUID(state.read_value(state.read_dict(state.read_root(), "String")))
 
+    conf = Conformance(state, scd_mm_id, scd_mm_id)
+    print("Conformance SCD_MM -> SCD_MM?", conf.check_nominal(log=True))
+    # print("--------------------------------------")
+    # print(renderer.render_od(state, scd_mm_id, scd_mm_id, hide_names=False))
+    # print("--------------------------------------")
+
     def create_dsl_mm_api():
         # Create DSL MM with SCD API
         dsl_mm_id = state.create_node()
@@ -64,7 +70,6 @@ Man_weight:AttributeLink (Man -> Integer)
     name = "weight"
     optional = False
 afraidOf:Association (Man -> Animal)
-    source_lower_cardinality = 0
     target_lower_cardinality = 1
 Man_inh_Animal:Inheritance (Man -> Animal)
 Bear_inh_Animal:Inheritance (Bear -> Animal)
diff --git a/services/od.py b/services/od.py
index d0898ae..dd56143 100644
--- a/services/od.py
+++ b/services/od.py
@@ -333,5 +333,5 @@ def read_primitive_value(bottom, modelref: UUID, mm: UUID):
     elif typ_name == "Boolean":
         return Boolean(referred_model, bottom.state).read()
     else:
-        raise Exception("Unimplemented type:", host_type_name)
+        raise Exception("Unimplemented type:", typ_name)