diff --git a/examples/exampleIrrigationUseCase1.ttl b/examples/exampleIrrigationUseCase1.ttl
index dfe4a1641f03c4df0a0cb3cd6766adf9515bb50b..2aa837d219ed344747d8dc866eb4023bdd2b0886 100644
--- a/examples/exampleIrrigationUseCase1.ttl
+++ b/examples/exampleIrrigationUseCase1.ttl
@@ -67,7 +67,7 @@ ex:ArvalisIrrinovStation01SoilSensor02
 ex:ArvalisIrrinovStation01SoilSensor02ObservationAtPT24H2016-06-14T000000_0200
   rdf:type owl:NamedIndividual ;
   rdf:type saref:Measurement ;
-  saref:hasValue "1490.0"^^xsd:double ;
+  saref:hasValue "1490.0"^^xsd:float ;
   saref:isMeasuredIn om:millibar ;
   saref:relatesToProperty s4agri:SoilMoisture ;
 .
diff --git a/examples/saref4agri-ex1.ttl b/examples/saref4agri-ex1.ttl
index 9f98cdcf0cb17f6b8c0c0b5ab2858798c0e1da33..a07274cea9993dbc665721cfbc1bc6baffeded47 100644
--- a/examples/saref4agri-ex1.ttl
+++ b/examples/saref4agri-ex1.ttl
@@ -19,7 +19,7 @@
   dcterms:license <https://forge.etsi.org/etsi-software-license> ;
   dcterms:conformsTo <https://saref.etsi.org/core/v3.1.1/> ;
   dcterms:conformsTo <https://saref.etsi.org/saref4agri/v1.1.2/> ;
-  dcterms:conformsTo <http://purl.obolibrary.org/obo/> ;
+  dcterms:conformsTo obo:TAXRANK_0000017, obo:TAXRANK_0000004 , obo:TAXRANK_0000006 , obo:TAXRANK_0000016 , obo:TAXRANK_0000003 ;
   dcterms:title "SAREF4AGRI example"@en ;
   dcterms:description "SAREF4AGRI example"@en .
 
@@ -58,14 +58,14 @@ ex:CompostIntake
 .
 ex:Compost_2019-02-02
   rdf:type saref:Measurement ;
-  saref:hasValue 370 ;
+  saref:hasValue "370"^^xsd:float ;
   saref:isMeasuredIn <http://www.wurvoc.org/vocabularies/om-1.8/Liter> ;
   saref:relatesToProperty ex:CompostIntake ;
 .
 ex:Compost_2019-02-16
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Parcel_East ;
-  saref:hasValue 240 ;
+  saref:isMeasurementOf ex:Parcel_East ;
+  saref:hasValue "240"^^xsd:float ;
   saref:isMeasuredIn <http://www.wurvoc.org/vocabularies/om-1.8/Liter> ;
   saref:relatesToProperty ex:CompostIntake ;
 .
@@ -79,7 +79,7 @@ ex:Cow1
   obo:TAXRANK_1000000 ex:Animalia ;
   obo:TAXRANK_1000000 ex:Bos_Taurus ;
   obo:TAXRANK_1000000 ex:Bovidae ;
-  s4agri:hasBirthDate "2016-05-29"^^xsd:string ;
+  s4agri:hasBirthDate "2016-05-29T00:00:00"^^xsd:dateTime ;
   s4agri:isMemberOf ex:Cow_Group_A ;
 .
 ex:Cow2
@@ -87,7 +87,7 @@ ex:Cow2
   obo:TAXRANK_1000000 ex:Animalia ;
   obo:TAXRANK_1000000 ex:Bos_Taurus ;
   obo:TAXRANK_1000000 ex:Bovidae ;
-  s4agri:hasBirthDate "2016-05-22"^^xsd:string ;
+  s4agri:hasBirthDate "2016-05-22T00:00:00"^^xsd:dateTime ;
   s4agri:isMemberOf ex:Cow_Group_A ;
 .
 ex:Cow3
@@ -95,7 +95,7 @@ ex:Cow3
   obo:TAXRANK_1000000 ex:Animalia ;
   obo:TAXRANK_1000000 ex:Bos_Taurus ;
   obo:TAXRANK_1000000 ex:Bovidae ;
-  s4agri:hasBirthDate "2018-03-15"^^xsd:string ;
+  s4agri:hasBirthDate "2018-03-15T00:00:00"^^xsd:dateTime ;
 .
 ex:Cow_1_Birth
   rdf:type owl:NamedIndividual ;
@@ -115,15 +115,15 @@ ex:Cow_3_Birth
 .
 ex:Cow_Activity_2019_03_01-14_00
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Cow3 ;
-  saref:hasValue "20"^^xsd:string ;
+  saref:isMeasurementOf ex:Cow3 ;
+  saref:hasValue "20"^^xsd:float ;
   saref:isMeasuredIn time:minute ;
   saref:relatesToProperty ex:Eating_Activity_in_minutes_per__hour ;
 .
 ex:Cow_Activity_2019_03_01-15_00
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Cow3 ;
-  saref:hasValue "15"^^xsd:string ;
+  saref:isMeasurementOf ex:Cow3 ;
+  saref:hasValue "15"^^xsd:float ;
   saref:isMeasuredIn time:minute ;
   saref:relatesToProperty ex:Eating_Activity_in_minutes_per__hour ;
 .
@@ -152,7 +152,6 @@ ex:CropYield
   rdfs:comment "Produced crops (i.e. cultivated plant)"@en ;
   rdfs:label "Crop Yield"^^xsd:string ;
   rdfs:subClassOf s4agri:Yield ;
-  ;
 .
 
 ex:Cyperales
@@ -164,7 +163,7 @@ ex:EatingActivitySensor
   rdfs:subClassOf saref:Sensor ;
 .
 ex:Eating_Activity_in_minutes_per__hour
-  rdf:type s4agri:Property ;
+  rdf:type saref:Property ;
 .
 ex:EggYield
   rdf:type owl:Class ;
@@ -187,6 +186,9 @@ ex:Farm_Jansen_and_Sons_Eindhoven
   s4agri:contains ex:Parcel_South ;
   s4agri:contains ex:Parcel_West ;
 .
+
+foaf:Person a owl:Class .
+
 ex:Farmer
   rdf:type owl:Class ;
   rdfs:comment "A Person which is a farmer as profession"^^xsd:string ;
@@ -208,7 +210,7 @@ ex:Greenhouse
 <https://saref.etsi.org/saref4agri/v1.1.2/example/saref4agri-ex1/H._Jansen>
   rdf:type ex:Farmer ;
   s4agri:isMemberOf ex:Jansen_and_Sons ;
-  s4agri:hasName "Hendricus Jansen"@en ;
+  s4agri:hasName "Hendricus Jansen" ;
 .
 ex:Heated_Glass_Greenhouse
   rdf:type ex:Greenhouse ;
@@ -222,7 +224,7 @@ ex:Intake_Sugar_Corn
 <https://saref.etsi.org/saref4agri/v1.1.2/example/saref4agri-ex1/J._Jansen>
   rdf:type ex:Farmer ;
   s4agri:isMemberOf ex:Jansen_and_Sons ;
-  s4agri:hasName "Johannes Jansen"@en ;
+  s4agri:hasName "Johannes Jansen" ;
 .
 ex:Jansen_and_Sons
   rdf:type ex:FarmHolding ;
@@ -244,7 +246,6 @@ ex:MeatYield
   rdf:type owl:Class ;
   rdfs:label "Meat Yield"^^xsd:string ;
   rdfs:subClassOf s4agri:Yield ;
-  ;
 .
 
 
@@ -275,43 +276,43 @@ ex:Milk_Cow_Meat
 .
 ex:Milk_Yield_2019-03-01_1
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Cow_Group_A ;
-  saref:hasValue "4,7"@en ;
+  saref:isMeasurementOf ex:Cow_Group_A ;
+  saref:hasValue "4.7"^^xsd:float ;
   saref:isMeasuredIn <http://www.wurvoc.org/vocabularies/om-1.8/Liter> ;
   saref:relatesToProperty ex:MilkYield ;
 .
 ex:Milk_Yield_2019-03-01_2
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Cow_Group_A ;
-  saref:hasValue "3,9"@en ;
+  saref:isMeasurementOf ex:Cow_Group_A ;
+  saref:hasValue "3.9"^^xsd:float ;
   saref:isMeasuredIn <http://www.wurvoc.org/vocabularies/om-1.8/Liter> ;
   saref:relatesToProperty ex:MilkYield ;
 .
 ex:Milk_Yield_2019-03-02_1
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Cow_Group_A ;
-  saref:hasValue "2,1"@en ;
+  saref:isMeasurementOf ex:Cow_Group_A ;
+  saref:hasValue "2.1"^^xsd:float ;
   saref:isMeasuredIn <http://www.wurvoc.org/vocabularies/om-1.8/Liter> ;
   saref:relatesToProperty ex:MilkYield ;
 .
 ex:Milk_Yield_2019-03-02_2
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Cow_Group_A ;
-  saref:hasValue "2,7"@en ;
+  saref:isMeasurementOf ex:Cow_Group_A ;
+  saref:hasValue "2.7"^^xsd:float ;
   saref:isMeasuredIn <http://www.wurvoc.org/vocabularies/om-1.8/Liter> ;
   saref:relatesToProperty ex:MilkYield ;
 .
 ex:Milk_Yield_2019-03-03_1
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Cow_Group_B ;
-  saref:hasValue "5,2"@en ;
+  saref:isMeasurementOf ex:Cow_Group_B ;
+  saref:hasValue "5.2"^^xsd:float ;
   saref:isMeasuredIn <http://www.wurvoc.org/vocabularies/om-1.8/Liter> ;
   saref:relatesToProperty ex:MilkYield ;
 .
 ex:Milk_Yield_2019-03-03_2
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Cow_Group_B ;
-  saref:hasValue "3,7"@en ;
+  saref:isMeasurementOf ex:Cow_Group_B ;
+  saref:hasValue "3.7"^^xsd:float ;
   saref:isMeasuredIn <http://www.wurvoc.org/vocabularies/om-1.8/Liter> ;
   saref:relatesToProperty ex:MilkYield ;
 .
@@ -335,13 +336,13 @@ ex:MovementActivitySensor
 ex:Parcel_East
   rdf:type s4agri:Parcel ;
   s4agri:contains ex:Sugar_Snaps_1 ;
-  s4agri:hasName "Field Frontyard"^^xsd:string ;
+  s4agri:hasName "Field Frontyard" ;
   s4agri:receives ex:Compost_2019-02-16 ;
 .
 ex:Parcel_North
   rdf:type s4agri:Parcel ;
   s4agri:contains ex:Cow_Group_A ;
-  s4agri:hasName "Grazing Plot"^^xsd:string ;
+  s4agri:hasName "Grazing Plot" ;
 .
 ex:Parcel_South
   rdf:type s4agri:Parcel ;
@@ -364,21 +365,20 @@ ex:Rosanae_Fabales
   rdfs:label "Rosanae Fabales"^^xsd:string ;
 .
 ex:Soil_Acidity
-  rdf:type s4agri:Property ;
   rdf:type saref:Property ;
   rdfs:label "Acidity"^^xsd:string ;
 .
 ex:Soil_Acidity_2019_03_04
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Parcel_East ;
-  saref:hasValue "7.4"^^xsd:string ;
+  saref:isMeasurementOf ex:Parcel_East ;
+  saref:hasValue "7.4"^^xsd:float ;
   saref:isMeasuredIn <http://www.wurvoc.org/vocabularies/om-1.8/Acidity> ;
   saref:relatesToProperty ex:Soil_Acidity ;
 .
 ex:Soil_Acidity_2019_03_05
   rdf:type saref:Measurement ;
-  saref:hasFeatureOfInterest ex:Parcel_East ;
-  saref:hasValue "7.5"^^xsd:string ;
+  saref:isMeasurementOf ex:Parcel_East ;
+  saref:hasValue "7.5"^^xsd:float ;
   saref:isMeasuredIn <http://www.wurvoc.org/vocabularies/om-1.8/Acidity> ;
   saref:relatesToProperty ex:Soil_Acidity ;
 .
@@ -431,9 +431,9 @@ ex:Vermicompost
   rdf:type obo:TAXRANK_0000006 ;
   rdfs:label "Zea mays L."^^xsd:string ;
 .
-s4agri:Location
-  rdf:type owl:ObjectProperty ;
-.
+#s4agri:Location   # does not exist in SAREF4AGRI
+#  rdf:type owl:ObjectProperty ;
+#.
 s4agri:hasID
   rdf:type owl:ObjectProperty ;
 .
@@ -441,15 +441,12 @@ s4agri:hasMember
   rdf:type owl:ObjectProperty ;
   rdfs:label "has member"^^xsd:string ;
 .
-s4agri:hasPlantDate
-  rdf:type owl:ObjectProperty ;
-.
-s4agri:hasSpace
-  rdf:type owl:ObjectProperty ;
-.
-s4agri:isProducedBy
-  rdf:type owl:ObjectProperty ;
-.
+# s4agri:hasSpace # does not exist in SAREF4AGRI
+#   rdf:type owl:ObjectProperty ;
+# .
+# s4agri:isProducedBy # does not exist in SAREF4AGRI
+#   rdf:type owl:ObjectProperty ;
+# .
 
 s4agri:managesFarm
   rdf:type owl:ObjectProperty ;
@@ -458,8 +455,8 @@ s4agri:managesFarm
 s4agri:receives
   rdf:type owl:ObjectProperty ;
 .
-saref:hasFeatureOfInterest
-  owl:inverseOf saref:isFeatureOfInterestOf ;
+saref:isMeasurementOf
+  owl:inverseOf saref:hasMeasurement ;
 .
 <http://www.wurvoc.org/vocabularies/om-1.8/Acidity>
   rdf:type saref:UnitOfMeasure ;
diff --git a/ontology/saref4agri.ttl b/ontology/saref4agri.ttl
index 05d8009398dc8d13a381404943c887aaff42f504..5843d40c352d697196140ecaab0f6b4eb8525b22 100644
--- a/ontology/saref4agri.ttl
+++ b/ontology/saref4agri.ttl
@@ -341,7 +341,7 @@ s4agri:managesFarm rdf:type owl:ObjectProperty ;
 
 ###  https://saref.etsi.org/saref4agri/receives
 s4agri:receives rdf:type owl:ObjectProperty ;
-  rdfs:subPropertyOf saref:hasProperty ;
+  rdfs:subPropertyOf saref:hasMeasurement ;
   rdfs:comment "A relation to represent the intake/consumption of certain substances in a Crop."@en ;
   rdfs:label "receives"@en .