diff --git a/config/transduction-schemes.ttl b/config/transduction-schemes.ttl
index 3f82ee7ba9494068e15bb832207d5830287bef9f..34b5e0ecad88b98c64a63d6801def86376e6e6e1 100644
--- a/config/transduction-schemes.ttl
+++ b/config/transduction-schemes.ttl
@@ -1395,35 +1395,36 @@ PREFIX fprm: <https://unsel.tetras-libre.fr/tenet/frame/parameters#>
 # -- Create Entity net
 CONSTRUCT { 
    # Object: entity 
-   ?newAtom a net:Object.
-   ?newAtom net:objectType net:atom.
-   ?newAtom net:atomType ?atomType.
-   # -- old --- ?newAtom net:objectType sys:Entity.
-   ?newAtom net:node ?uw1.
-   ?newAtom net:parentClass ?entityClass.
-   # -- old --- ?newAtom net:entityClass ?entityClass.
-   ?newAtom net:concept ?concept1.
+   ?newObject a net:Object.
+   ?newObject net:objectType net:atom.
+   ?newObject net:atomType ?atomType.
+   ?newObject net:node ?uw1.
+   ?newObject net:parentClass ?atomClass.
+   ?newObject net:concept ?concept1.
    # Net: Entity
    ?newNet a net:Instance.
    ?newNet net:type net:entity.
    ?newNet net:has_structure ?req.
    ?newNet net:has_node ?uw1.
-   ?newNet net:has_atom ?newAtom.
-   # -- old --- ?newNet net:has_entity ?newAtom.
+   ?newNet net:has_atom ?newObject.
 }
 WHERE {
    # Atom Description (from System Ontology)
-   fprm:System_Entity fprm:class ?atomType.
-   ?entity rdf:type fprm:System_Entity.
-   ?entity fprm:class ?entityClass.
-   ?entity fprm:restriction ?entityRestriction.
+   ?targetClass rdfs:subClassOf sys:Entity.
+   ?targetClass sys:has_mother_class ?atomType.
+   ?targetClass sys:is_class ?atomClass.
+   ?targetClass sys:has_restriction ?restriction.
+   # -- old --- fprm:System_Entity fprm:class ?atomType.
+   # -- old --- ?entity rdf:type fprm:System_Entity.
+   # -- old --- ?entity fprm:class ?entityClass.
+   # -- old --- ?entity fprm:restriction ?entityRestriction.
    # UW: type UW-Occurrence and substructure of req sentence
    ?uw1 rdf:type unl:UW_Occurrence.
    ?uw1 unl:is_substructure_of ?req.
    # ------ ?uw1 unl:is_occurrence_of ?lexTrg.
    # Filter on label
    ?uw1 rdfs:label ?uw1Label.
-   FILTER ( regex(str(?uw1Label),str(?entityRestriction))  ).
+   FILTER ( regex(str(?uw1Label),str(?restriction))  ).
    # Label: Id, concept
    ?uw1 unl:has_id ?uw1Id.
    BIND (strbefore(?uw1Label, '(') AS ?concept1).
@@ -1432,10 +1433,10 @@ WHERE {
    cprm:Config_Parameters cprm:objectRef ?objectRef.
    BIND (concat( ?netURI, ?objectRef) AS ?e1).
    BIND (concat(?e1, ?uw1Id) AS ?e2).
-   BIND (uri(?e2) AS ?newAtom).
+   BIND (uri(?e2) AS ?newObject).
    # URI (for Entity Net)
    cprm:Config_Parameters cprm:netURI ?netURI.
-   BIND (concat( ?netURI, ?entityClass, '_') AS ?n1).
+   BIND (concat( ?netURI, ?atomClass, '_') AS ?n1).
    BIND (concat(?n1, ?uw1Id) AS ?n2).
    BIND (uri(?n2) AS ?newNet).
 }""" ;
diff --git a/frame/system-ontology.ttl b/frame/system-ontology.ttl
index 6d41e3bb1e7cfbd716a96b15cf690f31a225025f..f39a2539dfb3152bf11388ed7197e4871e7fb580 100644
--- a/frame/system-ontology.ttl
+++ b/frame/system-ontology.ttl
@@ -23,12 +23,14 @@ sys:Abstraction
   rdfs:label "Abstraction"@en ;
   rdfs:label "Abstraction"@fr ;
   rdfs:subClassOf sys:Structure ;
+  sys:is_class "Abstraction" ;
 .
 sys:Entity
   rdf:type owl:Class ;
   rdfs:label "entity"@en ;
   rdfs:label "entité"@fr ;
   rdfs:subClassOf sys:Structure ;
+  sys:is_class "Entity" ;
 .
 sys:Event
   rdf:type owl:Class ;
@@ -41,6 +43,7 @@ sys:Feature
   rdfs:label "caractéristique"@fr ;
   rdfs:label "feature"@en ;
   rdfs:subClassOf sys:Structure ;
+  sys:is_class "Feature" ;
 .
 sys:State_Property
   rdf:type owl:Class ;
@@ -56,28 +59,43 @@ sys:Verb
   rdf:type owl:Class ;
   rdfs:label "Verb" ;
   rdfs:subClassOf sys:Structure ;
+  sys:is_class "Verb" ;
 .
 sys:abstract_thing
   rdf:type owl:Class ;
   rdfs:label "abstract thing"@en ;
   rdfs:label "élément abstrait"@fr ;
   rdfs:subClassOf sys:Abstraction ;
+  sys:has_mother_class "Abstraction" ;
+  sys:has_restriction "icl>abstract_thing" ;
+  sys:is_class "abstract_thing" ;
 .
 sys:action_verb
   rdf:type owl:Class ;
   rdfs:label "action verb" ;
   rdfs:subClassOf sys:Verb ;
+  sys:has_mother_class "Verb" ;
+  sys:has_restriction "icl>do" ;
+  sys:is_class "action_verb" ;
 .
 sys:agent
   rdf:type owl:Class ;
   rdfs:label "agent"@en ;
   rdfs:label "agent"@fr ;
   rdfs:subClassOf sys:Entity ;
+  sys:has_mother_class "Entity" ;
+  sys:has_restriction "icl>administrator" ;
+  sys:has_restriction "icl>operator" ;
+  sys:has_restriction "icl>person" ;
+  sys:is_class "agent" ;
 .
 sys:attributive_verb
   rdf:type owl:Class ;
   rdfs:label "attributive verb" ;
   rdfs:subClassOf sys:Verb ;
+  sys:has_mother_class "Verb" ;
+  sys:has_restriction "icl>be" ;
+  sys:is_class "attributive_verb" ;
 .
 sys:classProperty
   rdf:type rdf:Property ;
@@ -88,6 +106,13 @@ sys:component
   rdfs:label "component"@en ;
   rdfs:label "composant"@fr ;
   rdfs:subClassOf sys:Entity ;
+  sys:has_mother_class "Entity" ;
+  sys:has_restriction "icl>device" ;
+  sys:has_restriction "icl>electronic_device" ;
+  sys:has_restriction "icl>instrumentality" ;
+  sys:has_restriction "icl>position" ;
+  sys:has_restriction "icl>public_transport" ;
+  sys:is_class "component" ;
 .
 sys:entityClassProperty
   rdf:type rdf:Property ;
@@ -119,6 +144,34 @@ sys:has_feature
   rdfs:label "feature" ;
   rdfs:subPropertyOf sys:entityClassProperty ;
 .
+sys:has_frame_base_uri
+  rdf:type rdf:Property ;
+  rdfs:label "has frame base uri" ;
+  rdfs:subPropertyOf sys:seedProperty ;
+  sys:has_frame_base_uri "https://unsel.tetras-libre.fr/tenet/frame/system-ontology/" ;
+.
+sys:has_mother_class
+  rdf:type rdf:Property ;
+  rdfs:label "has mother class" ;
+  rdfs:subPropertyOf sys:seedProperty ;
+  sys:has_mother_class "Entity" ;
+  sys:has_restriction "icl>administrator" ;
+  sys:has_restriction "icl>operator" ;
+  sys:has_restriction "icl>person" ;
+  sys:is_class "agent" ;
+.
+sys:has_object_property
+  rdf:type rdf:Property ;
+  rdfs:label "has object property" ;
+  rdfs:subPropertyOf sys:seedProperty ;
+  sys:has_object_property "eventObjectProperty" ;
+  sys:is_class "Event" ;
+.
+sys:has_restriction
+  rdf:type rdf:Property ;
+  rdfs:label "has restriction" ;
+  rdfs:subPropertyOf sys:seedProperty ;
+.
 sys:has_target
   rdf:type rdf:Property ;
   rdfs:label "has target" ;
@@ -129,11 +182,22 @@ sys:has_verb
   rdfs:label "has verb" ;
   rdfs:subPropertyOf sys:eventClassProperty ;
 .
+sys:is_class
+  rdf:type rdf:Property ;
+  rdfs:label "is class" ;
+  rdfs:subPropertyOf sys:seedProperty ;
+  sys:has_object_property "statePropertyObjectProperty" ;
+  sys:is_class "State_Property" ;
+.
 sys:message
   rdf:type owl:Class ;
   rdfs:label "message"@en ;
   rdfs:label "message"@fr ;
   rdfs:subClassOf sys:Entity ;
+  sys:has_mother_class "Entity" ;
+  sys:has_restriction "icl>assignment" ;
+  sys:has_restriction "icl>communication" ;
+  sys:is_class "message" ;
 .
 sys:objectProperty
   rdf:type rdf:Property ;
@@ -144,6 +208,14 @@ sys:place
   rdfs:label "lieu"@fr ;
   rdfs:label "place"@en ;
   rdfs:subClassOf sys:Feature ;
+  sys:has_mother_class "Feature" ;
+  sys:has_restriction "icl>air_base_installation" ;
+  sys:has_restriction "icl>place" ;
+  sys:is_class "place" ;
+.
+sys:seedProperty
+  rdf:type rdf:Property ;
+  rdfs:label "seed property" ;
 .
 sys:statePropertyObjectProperty
   rdf:type rdf:Property ;
diff --git a/prepare_work_data.py b/prepare_work_data.py
index e8e360df0b4192dfbcb1ed2bd9c2477d69cd1c3c..31758eb7deeed34c9da39843d511b2867e4753cf 100644
--- a/prepare_work_data.py
+++ b/prepare_work_data.py
@@ -153,7 +153,9 @@ def finalize_export_file(export_file):
             "@prefix sys: <https://unsel.tetras-libre.fr/tenet/frame/system-ontology/> .",
             """@prefix sys: <https://unsel.tetras-libre.fr/tenet/frame/system-ontology/> .
 @prefix sys-Event: <https://unsel.tetras-libre.fr/tenet/frame/system-ontology/Event#> .
+@prefix sys-event: <https://unsel.tetras-libre.fr/tenet/frame/system-ontology/eventObjectProperty#> .
 @prefix sys-State_Property: <https://unsel.tetras-libre.fr/tenet/frame/system-ontology/State_Property#> .
+@prefix sys-stateProperty: <https://unsel.tetras-libre.fr/tenet/frame/system-ontology/statePropertyObjectProperty#> .
 @prefix sys-abstract_thing: <https://unsel.tetras-libre.fr/tenet/frame/system-ontology/abstract_thing#> .
 @prefix sys-action_verb: <https://unsel.tetras-libre.fr/tenet/frame/system-ontology/action_verb#> .
 @prefix sys-agent: <https://unsel.tetras-libre.fr/tenet/frame/system-ontology/agent#> .