diff --git a/SIMPL19424_20260610_155158.TF b/SIMPL19424_20260610_155158.TF
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+@prefix sh: <http://www.w3.org/ns/shacl#> .
+@prefix ex: <http://example.org/simpl#> .
+@prefix dct: <http://purl.org/dc/terms/> .
+@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
+@prefix foaf: <http://xmlns.com/foaf/0.1/> .
+
+ex:ParticipantShape
+    a sh:NodeShape ;
+    sh:targetClass ex:Participant ;
+
+    sh:property [
+        sh:path foaf:name ;
+        sh:datatype xsd:string ;
+        sh:minCount 1 ;
+        sh:message "Participant must have a name."
+    ] ;
+
+    sh:property [
+        sh:path dct:identifier ;
+        sh:datatype xsd:string ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:message "Participant must have exactly one identifier."
+    ] .
+
+ex:ResourceOfferingShape
+    a sh:NodeShape ;
+    sh:targetClass ex:ResourceOffering ;
+
+    sh:property [
+        sh:path dct:title ;
+        sh:datatype xsd:string ;
+        sh:minCount 1 ;
+        sh:message "Resource offering must have a title."
+    ] ;
+
+    sh:property [
+        sh:path dct:description ;
+        sh:datatype xsd:string ;
+        sh:minCount 1 ;
+        sh:message "Resource offering must have a description."
+    ] ;
+
+    sh:property [
+        sh:path ex:providedBy ;
+        sh:class ex:Participant ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:message "Resource offering must reference exactly one participant provider."
+    ] ;
+
+    sh:property [
+        sh:path dct:created ;
+        sh:datatype xsd:dateTime ;
+        sh:minCount 1 ;
+        sh:message "Resource offering must include a creation timestamp."
+    ] .
+    ] .
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