diff --git a/bids2openminds/main.py b/bids2openminds/main.py
index 3c2ea3f..77ae924 100644
--- a/bids2openminds/main.py
+++ b/bids2openminds/main.py
@@ -6,8 +6,8 @@
 import pandas as pd
 from nameparser import HumanName
 
-import openminds.v3.core as omcore
-import openminds.v3.controlled_terms as controlled_terms
+import openminds.v4.core as omcore
+import openminds.v4.controlled_terms as controlled_terms
 from openminds import IRI
 
 from .utility import table_filter, pd_table_value, file_hash, file_storage_size, detect_nifti_version
diff --git a/bids2openminds/utility.py b/bids2openminds/utility.py
index 7311a9d..756a2c3 100644
--- a/bids2openminds/utility.py
+++ b/bids2openminds/utility.py
@@ -7,9 +7,9 @@
 
 import pandas as pd
 
-import openminds.v3.controlled_terms as controlled_terms
-from openminds.v3.core import Hash, QuantitativeValue, ContentType
-from openminds.v3.controlled_terms import UnitOfMeasurement
+import openminds.v4.controlled_terms as controlled_terms
+from openminds.v4.core import Hash, QuantitativeValue, ContentType
+from openminds.v4.controlled_terms import UnitOfMeasurement
 
 
 def read_json(file_path: str) -> dict:
diff --git a/test/bids_examples_ds005.jsonld b/test/bids_examples_ds005.jsonld
index a3793d4..e4f9467 100644
--- a/test/bids_examples_ds005.jsonld
+++ b/test/bids_examples_ds005.jsonld
@@ -1,36 +1,31 @@
 {
   "@context": {
-    "@vocab": "https://openminds.ebrains.eu/vocab/"
+    "@vocab": "https://openminds.om-i.org/props/"
   },
   "@graph": [
     {
       "@id": "_:000000",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 28
       },
       "internalIdentifier": "Studied state sub-01",
       "lookupLabel": "Studied state sub-01"
     },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/UnitOfMeasurement",
-      "name": "year"
-    },
     {
       "@id": "_:000002",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/male"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/male"
       },
       "internalIdentifier": "sub-01",
       "lookupLabel": "sub-01",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -38,36 +33,13 @@
         }
       ]
     },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/biologicalSex/male",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/BiologicalSex",
-      "definition": "Biological sex that produces sperm cells (spermatozoa).",
-      "description": "A male organism typically has the capacity to produce relatively small, usually mobile gametes (reproductive cells), called sperm cells (or spermatozoa). In the process of fertilization, these sperm cells fuse with a larger, usually immobile female gamete, called egg cell (or ovum).",
-      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0106489",
-      "name": "male",
-      "preferredOntologyIdentifier": "http://purl.obolibrary.org/obo/PATO_0000384"
-    },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/Species",
-      "definition": "The species *Homo sapiens* (humans) belongs to the family of *hominidae* (great apes).",
-      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0105114",
-      "knowledgeSpaceLink": "https://knowledge-space.org/wiki/NCBITaxon:9606#human",
-      "name": "Homo sapiens",
-      "preferredOntologyIdentifier": "http://purl.obolibrary.org/obo/NCBITaxon_9606",
-      "synonym": [
-        "homo sapien",
-        "human",
-        "man"
-      ]
-    },
     {
       "@id": "_:000005",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 21
       },
@@ -76,14 +48,14 @@
     },
     {
       "@id": "_:000006",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/female"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/female"
       },
       "internalIdentifier": "sub-02",
       "lookupLabel": "sub-02",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -91,22 +63,13 @@
         }
       ]
     },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/biologicalSex/female",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/BiologicalSex",
-      "definition": "Biological sex that produces egg cells (ova).",
-      "description": "A female organism typically has the capacity to produce relatively large, usually immobile gametes (reproductive cells), called egg cells (or ova). In the process of fertilization, an egg cell (ovum) fuses with a smaller, usually mobile male gametes, called sperm cells (or spermatozoa).",
-      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0104150",
-      "name": "female",
-      "preferredOntologyIdentifier": "http://purl.obolibrary.org/obo/PATO_0000383"
-    },
     {
       "@id": "_:000008",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 27
       },
@@ -115,14 +78,14 @@
     },
     {
       "@id": "_:000009",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/female"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/female"
       },
       "internalIdentifier": "sub-03",
       "lookupLabel": "sub-03",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -132,11 +95,11 @@
     },
     {
       "@id": "_:000010",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 25
       },
@@ -145,14 +108,14 @@
     },
     {
       "@id": "_:000011",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/male"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/male"
       },
       "internalIdentifier": "sub-04",
       "lookupLabel": "sub-04",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -162,11 +125,11 @@
     },
     {
       "@id": "_:000012",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 20
       },
@@ -175,14 +138,14 @@
     },
     {
       "@id": "_:000013",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/female"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/female"
       },
       "internalIdentifier": "sub-05",
       "lookupLabel": "sub-05",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -192,11 +155,11 @@
     },
     {
       "@id": "_:000014",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 20
       },
@@ -205,14 +168,14 @@
     },
     {
       "@id": "_:000015",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/male"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/male"
       },
       "internalIdentifier": "sub-06",
       "lookupLabel": "sub-06",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -222,11 +185,11 @@
     },
     {
       "@id": "_:000016",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 24
       },
@@ -235,14 +198,14 @@
     },
     {
       "@id": "_:000017",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/female"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/female"
       },
       "internalIdentifier": "sub-07",
       "lookupLabel": "sub-07",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -252,11 +215,11 @@
     },
     {
       "@id": "_:000018",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 25
       },
@@ -265,14 +228,14 @@
     },
     {
       "@id": "_:000019",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/male"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/male"
       },
       "internalIdentifier": "sub-08",
       "lookupLabel": "sub-08",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -282,11 +245,11 @@
     },
     {
       "@id": "_:000020",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 19
       },
@@ -295,14 +258,14 @@
     },
     {
       "@id": "_:000021",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/female"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/female"
       },
       "internalIdentifier": "sub-09",
       "lookupLabel": "sub-09",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -312,11 +275,11 @@
     },
     {
       "@id": "_:000022",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 20
       },
@@ -325,14 +288,14 @@
     },
     {
       "@id": "_:000023",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/male"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/male"
       },
       "internalIdentifier": "sub-10",
       "lookupLabel": "sub-10",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -342,11 +305,11 @@
     },
     {
       "@id": "_:000024",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 20
       },
@@ -355,14 +318,14 @@
     },
     {
       "@id": "_:000025",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/male"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/male"
       },
       "internalIdentifier": "sub-11",
       "lookupLabel": "sub-11",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -372,11 +335,11 @@
     },
     {
       "@id": "_:000026",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 21
       },
@@ -385,14 +348,14 @@
     },
     {
       "@id": "_:000027",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/male"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/male"
       },
       "internalIdentifier": "sub-12",
       "lookupLabel": "sub-12",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -402,11 +365,11 @@
     },
     {
       "@id": "_:000028",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 22
       },
@@ -415,14 +378,14 @@
     },
     {
       "@id": "_:000029",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/female"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/female"
       },
       "internalIdentifier": "sub-13",
       "lookupLabel": "sub-13",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -432,11 +395,11 @@
     },
     {
       "@id": "_:000030",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "age": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/year"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year"
         },
         "value": 19
       },
@@ -445,14 +408,14 @@
     },
     {
       "@id": "_:000031",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "biologicalSex": {
-        "@id": "https://openminds.ebrains.eu/instances/biologicalSex/female"
+        "@id": "https://openminds.om-i.org/instances/biologicalSex/female"
       },
       "internalIdentifier": "sub-14",
       "lookupLabel": "sub-14",
       "species": {
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@@ -462,11 +425,11 @@
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+      "@type": "https://openminds.om-i.org/types/File",
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       "isPartOf": [
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-          "@id": "_:000048"
+          "@id": "_:000075"
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       "storageSize": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
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-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/byte"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/byte"
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         "value": 5871
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       "@id": "_:000218",
-      "@type": "https://openminds.ebrains.eu/core/File",
+      "@type": "https://openminds.om-i.org/types/File",
       "IRI": "PREFIXsub-16/func/sub-16_task-mixedgamblestask_run-02_bold.nii.gz",
       "contentDescription": "Data file for bold of subject 16",
       "dataType": [
         {
-          "@id": "https://openminds.ebrains.eu/instances/dataType/voxelData"
+          "@id": "https://openminds.om-i.org/instances/dataType/voxelData"
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       ],
       "fileRepository": {
@@ -5291,60 +5306,61 @@
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       "hash": [
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-          "@type": "https://openminds.ebrains.eu/core/Hash",
+          "@type": "https://openminds.om-i.org/types/Hash",
           "algorithm": "MD5",
           "digest": "d41d8cd98f00b204e9800998ecf8427e"
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-          "@id": "_:000048"
+          "@id": "_:000075"
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       "name": "sub-16_task-mixedgamblestask_run-02_bold.nii.gz",
       "storageSize": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
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-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/byte"
-        }
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/byte"
+        },
+        "value": 0
       }
     },
     {
       "@id": "_:000219",
-      "@type": "https://openminds.ebrains.eu/core/File",
+      "@type": "https://openminds.om-i.org/types/File",
       "IRI": "PREFIXsub-16/func/sub-16_task-mixedgamblestask_run-02_events.tsv",
       "fileRepository": {
         "@id": "_:000039"
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       "hash": [
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-          "@type": "https://openminds.ebrains.eu/core/Hash",
+          "@type": "https://openminds.om-i.org/types/Hash",
           "algorithm": "MD5",
           "digest": "91a43a203ce087e31a677e16d365e2bd"
         }
       ],
       "isPartOf": [
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-          "@id": "_:000048"
+          "@id": "_:000075"
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       "name": "sub-16_task-mixedgamblestask_run-02_events.tsv",
       "storageSize": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/byte"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/byte"
         },
         "value": 5794
       }
     },
     {
       "@id": "_:000220",
-      "@type": "https://openminds.ebrains.eu/core/File",
+      "@type": "https://openminds.om-i.org/types/File",
       "IRI": "PREFIXsub-16/func/sub-16_task-mixedgamblestask_run-03_bold.nii.gz",
       "contentDescription": "Data file for bold of subject 16",
       "dataType": [
         {
-          "@id": "https://openminds.ebrains.eu/instances/dataType/voxelData"
+          "@id": "https://openminds.om-i.org/instances/dataType/voxelData"
         }
       ],
       "fileRepository": {
@@ -5352,148 +5368,149 @@
       },
       "hash": [
         {
-          "@type": "https://openminds.ebrains.eu/core/Hash",
+          "@type": "https://openminds.om-i.org/types/Hash",
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           "digest": "d41d8cd98f00b204e9800998ecf8427e"
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+          "@id": "_:000075"
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       "name": "sub-16_task-mixedgamblestask_run-03_bold.nii.gz",
       "storageSize": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/byte"
-        }
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/byte"
+        },
+        "value": 0
       }
     },
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       "@id": "_:000221",
-      "@type": "https://openminds.ebrains.eu/core/File",
+      "@type": "https://openminds.om-i.org/types/File",
       "IRI": "PREFIXsub-16/func/sub-16_task-mixedgamblestask_run-03_events.tsv",
       "fileRepository": {
         "@id": "_:000039"
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       "hash": [
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-          "@type": "https://openminds.ebrains.eu/core/Hash",
+          "@type": "https://openminds.om-i.org/types/Hash",
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         }
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       "name": "sub-16_task-mixedgamblestask_run-03_events.tsv",
       "storageSize": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/byte"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/byte"
         },
         "value": 5817
       }
     },
     {
       "@id": "_:000222",
-      "@type": "https://openminds.ebrains.eu/core/File",
+      "@type": "https://openminds.om-i.org/types/File",
       "IRI": "PREFIXtask-mixedgamblestask_bold.json",
       "fileRepository": {
         "@id": "_:000039"
       },
       "hash": [
         {
-          "@type": "https://openminds.ebrains.eu/core/Hash",
+          "@type": "https://openminds.om-i.org/types/Hash",
           "algorithm": "MD5",
           "digest": "8c89b909fbcb8494a69c53afdb2d25ae"
         }
       ],
       "name": "task-mixedgamblestask_bold.json",
       "storageSize": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/byte"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/byte"
         },
         "value": 67
       }
     },
     {
       "@id": "_:000223",
-      "@type": "https://openminds.ebrains.eu/core/File",
+      "@type": "https://openminds.om-i.org/types/File",
       "IRI": "PREFIXCHANGES",
       "fileRepository": {
         "@id": "_:000039"
       },
       "hash": [
         {
-          "@type": "https://openminds.ebrains.eu/core/Hash",
+          "@type": "https://openminds.om-i.org/types/Hash",
           "algorithm": "MD5",
           "digest": "99877475c9b8921878db046c3d119fb2"
         }
       ],
       "name": "CHANGES",
       "storageSize": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/byte"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/byte"
         },
         "value": 149
       }
     },
     {
       "@id": "_:000224",
-      "@type": "https://openminds.ebrains.eu/core/File",
+      "@type": "https://openminds.om-i.org/types/File",
       "IRI": "PREFIXREADME",
       "fileRepository": {
         "@id": "_:000039"
       },
       "hash": [
         {
-          "@type": "https://openminds.ebrains.eu/core/Hash",
+          "@type": "https://openminds.om-i.org/types/Hash",
           "algorithm": "MD5",
           "digest": "3f16631d3dec0049d0d03d626be289bc"
         }
       ],
       "name": "README",
       "storageSize": {
-        "@type": "https://openminds.ebrains.eu/core/QuantitativeValue",
+        "@type": "https://openminds.om-i.org/types/QuantitativeValue",
         "unit": {
-          "@id": "https://openminds.ebrains.eu/instances/unitOfMeasurement/byte"
+          "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/byte"
         },
         "value": 1019
       }
     },
     {
       "@id": "_:000225",
-      "@type": "https://openminds.ebrains.eu/core/Person",
+      "@type": "https://openminds.om-i.org/types/Person",
       "familyName": "S.M.",
       "givenName": "Tom"
     },
     {
       "@id": "_:000226",
-      "@type": "https://openminds.ebrains.eu/core/Person",
+      "@type": "https://openminds.om-i.org/types/Person",
       "familyName": "C.R.",
       "givenName": "Fox"
     },
     {
       "@id": "_:000227",
-      "@type": "https://openminds.ebrains.eu/core/Person",
+      "@type": "https://openminds.om-i.org/types/Person",
       "familyName": "C.",
       "givenName": "Trepel"
     },
     {
       "@id": "_:000228",
-      "@type": "https://openminds.ebrains.eu/core/Person",
+      "@type": "https://openminds.om-i.org/types/Person",
       "familyName": "R.A.",
       "givenName": "Poldrack"
     },
     {
       "@id": "_:000229",
-      "@type": "https://openminds.ebrains.eu/core/DatasetVersion",
+      "@type": "https://openminds.om-i.org/types/DatasetVersion",
       "author": [
         {
           "@id": "_:000225"
@@ -5515,15 +5532,15 @@
       ],
       "dataType": [
         {
-          "@id": "https://openminds.ebrains.eu/instances/semanticDataType/rawData"
+          "@id": "https://openminds.om-i.org/instances/semanticDataType/rawData"
         }
       ],
       "experimentalApproach": [
         {
-          "@id": "https://openminds.ebrains.eu/instances/experimentalApproach/anatomy"
+          "@id": "https://openminds.om-i.org/instances/experimentalApproach/anatomy"
         },
         {
-          "@id": "https://openminds.ebrains.eu/instances/experimentalApproach/neuroimaging"
+          "@id": "https://openminds.om-i.org/instances/experimentalApproach/neuroimaging"
         }
       ],
       "fullName": "Mixed-gambles task",
@@ -5583,51 +5600,13 @@
       ],
       "technique": [
         {
-          "@id": "https://openminds.ebrains.eu/instances/technique/T2PulseSequence"
+          "@id": "https://openminds.om-i.org/instances/technique/structuralMagneticResonanceImaging"
         }
       ]
     },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/semanticDataType/rawData",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/SemanticDataType",
-      "name": "raw data"
-    },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/experimentalApproach/anatomy",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/ExperimentalApproach",
-      "definition": "Any experimental approach focused on the bodily structure of living organisms.",
-      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0739411",
-      "name": "anatomy",
-      "preferredOntologyIdentifier": "http://uri.interlex.org/tgbugs/uris/readable/modality/Anatomy",
-      "synonym": [
-        "anatomical approach"
-      ]
-    },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/experimentalApproach/neuroimaging",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/ExperimentalApproach",
-      "definition": "Any experimental approach focused on the non-invasive direct or indirect imaging of the structure, function, or pharmacology of the nervous system.",
-      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0741206",
-      "name": "neuroimaging",
-      "preferredOntologyIdentifier": "http://uri.interlex.org/tgbugs/uris/readable/modality/Neuroimaging"
-    },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/technique/T2PulseSequence",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/Technique",
-      "definition": "In magnetic resonance imaging, a 'T2 pulse sequence' is a contrasting technique that allows the magnetization of the specimen or object to decay (spin-spin relaxation) before measuring the magnetic resonance signal by changing the echo time. [adapted from [wikipedia](https://en.wikipedia.org/wiki/MRI_sequence)]",
-      "name": "T2 pulse sequence",
-      "synonym": [
-        "T2 weighted imaging",
-        "T2 weighted magnetic resonance imaging",
-        "T2 weighted MRI",
-        "T2w imaging",
-        "T2w magnetic resonance imaging",
-        "T2w MRI"
-      ]
-    },
     {
       "@id": "_:000234",
-      "@type": "https://openminds.ebrains.eu/core/Dataset",
+      "@type": "https://openminds.om-i.org/types/Dataset",
       "author": [
         {
           "@id": "_:000225"
@@ -5649,6 +5628,121 @@
         }
       ],
       "shortName": "Mixed-gambles task"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/biologicalSex/female",
+      "@type": "https://openminds.om-i.org/types/BiologicalSex",
+      "definition": "Biological sex that produces egg cells (ova).",
+      "description": "A female organism typically has the capacity to produce relatively large, usually immobile gametes (reproductive cells), called egg cells (or ova). In the process of fertilization, an egg cell (ovum) fuses with a smaller, usually mobile male gametes, called sperm cells (or spermatozoa).",
+      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0104150",
+      "name": "female",
+      "preferredOntologyIdentifier": "http://purl.obolibrary.org/obo/PATO_0000383"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/biologicalSex/male",
+      "@type": "https://openminds.om-i.org/types/BiologicalSex",
+      "definition": "Biological sex that produces sperm cells (spermatozoa).",
+      "description": "A male organism typically has the capacity to produce relatively small, usually mobile gametes (reproductive cells), called sperm cells (or spermatozoa). In the process of fertilization, these sperm cells fuse with a larger, usually immobile female gamete, called egg cell (or ovum).",
+      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0106489",
+      "name": "male",
+      "preferredOntologyIdentifier": "http://purl.obolibrary.org/obo/PATO_0000384"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/contentTypes/application_json",
+      "@type": "https://openminds.om-i.org/types/ContentType",
+      "fileExtension": [
+        ".json"
+      ],
+      "name": "application/json",
+      "relatedMediaType": "https://www.iana.org/assignments/media-types/application/json",
+      "synonym": [
+        "JavaScript Object Notation",
+        "JSON"
+      ]
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/contentTypes/application_vnd.bids",
+      "@type": "https://openminds.om-i.org/types/ContentType",
+      "name": "application/vnd.bids",
+      "synonym": [
+        "BIDS"
+      ]
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/dataType/associativeArray",
+      "@type": "https://openminds.om-i.org/types/DataType",
+      "definition": "A 'associative array' is an abstract data type that associates keys (scalars) with values (scalars, lists or matrices).",
+      "name": "associative array",
+      "preferredOntologyIdentifier": "https://www.wikidata.org/entity/Q80585",
+      "synonym": [
+        "dictionary"
+      ]
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/dataType/voxelData",
+      "@type": "https://openminds.om-i.org/types/DataType",
+      "definition": "'Voxel data' is a matrix defining values (scalars, lists, or matrices) on a grid in a three dimensional space, which can be rendered to raster graphic.",
+      "name": "voxel data"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/experimentalApproach/anatomy",
+      "@type": "https://openminds.om-i.org/types/ExperimentalApproach",
+      "definition": "Any experimental approach focused on the bodily structure of living organisms.",
+      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0739411",
+      "name": "anatomy",
+      "preferredOntologyIdentifier": "http://uri.interlex.org/tgbugs/uris/readable/modality/Anatomy",
+      "synonym": [
+        "anatomical approach"
+      ]
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/experimentalApproach/neuroimaging",
+      "@type": "https://openminds.om-i.org/types/ExperimentalApproach",
+      "definition": "Any experimental approach focused on the non-invasive direct or indirect imaging of the structure, function, or pharmacology of the nervous system.",
+      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0741206",
+      "name": "neuroimaging",
+      "preferredOntologyIdentifier": "http://uri.interlex.org/tgbugs/uris/readable/modality/Neuroimaging"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/semanticDataType/rawData",
+      "@type": "https://openminds.om-i.org/types/SemanticDataType",
+      "name": "raw data"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/species/homoSapiens",
+      "@type": "https://openminds.om-i.org/types/Species",
+      "definition": "The species *Homo sapiens* (humans) belongs to the family of *hominidae* (great apes).",
+      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0105114",
+      "knowledgeSpaceLink": "https://knowledge-space.org/wiki/NCBITaxon:9606#human",
+      "name": "Homo sapiens",
+      "preferredOntologyIdentifier": "http://purl.obolibrary.org/obo/NCBITaxon_9606",
+      "synonym": [
+        "homo sapien",
+        "human",
+        "man"
+      ]
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/technique/structuralMagneticResonanceImaging",
+      "@type": "https://openminds.om-i.org/types/Technique",
+      "definition": "A magnetic resonance imaging technique that uses strong magnetic fields, magnetic field gradients, and radio waves to generate images with static information of the scanned body.",
+      "name": "structural magnetic resonance imaging",
+      "synonym": [
+        "sMRI",
+        "structural MRI",
+        "MRI",
+        "magnetic resonance imaging"
+      ]
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/byte",
+      "@type": "https://openminds.om-i.org/types/UnitOfMeasurement",
+      "name": "byte"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/year",
+      "@type": "https://openminds.om-i.org/types/UnitOfMeasurement",
+      "name": "year"
     }
   ]
-}
+}
\ No newline at end of file
diff --git a/test/bids_examples_eeg_rest_fmri.jsonld b/test/bids_examples_eeg_rest_fmri.jsonld
index 0067dfd..06311ad 100644
--- a/test/bids_examples_eeg_rest_fmri.jsonld
+++ b/test/bids_examples_eeg_rest_fmri.jsonld
@@ -1,21 +1,21 @@
 {
   "@context": {
-    "@vocab": "https://openminds.ebrains.eu/vocab/"
+    "@vocab": "https://openminds.om-i.org/props/"
   },
   "@graph": [
     {
       "@id": "_:000000",
-      "@type": "https://openminds.ebrains.eu/core/SubjectState",
+      "@type": "https://openminds.om-i.org/types/SubjectState",
       "internalIdentifier": "Studied state sub-32",
       "lookupLabel": "Studied state sub-32"
     },
     {
       "@id": "_:000001",
-      "@type": "https://openminds.ebrains.eu/core/Subject",
+      "@type": "https://openminds.om-i.org/types/Subject",
       "internalIdentifier": "sub-32",
       "lookupLabel": "sub-32",
       "species": {
-        "@id": "https://openminds.ebrains.eu/instances/species/homoSapiens"
+        "@id": "https://openminds.om-i.org/instances/species/homoSapiens"
       },
       "studiedState": [
         {
@@ -23,33 +23,19 @@
         }
       ]
     },
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-      "synonym": [
-        "anatomical approach"
-      ]
-    },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/experimentalApproach/electrophysiology",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/ExperimentalApproach",
-      "definition": "Any experimental approach focused on electrical phenomena associated with living systems, most notably the nervous system, cardiac system, and musculoskeletal system.",
-      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0741202",
-      "name": "electrophysiology",
-      "preferredOntologyIdentifier": "http://uri.interlex.org/tgbugs/uris/readable/modality/Electrophysiology"
-    },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/technique/diffusionWeightedImaging",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/Technique",
-      "name": "diffusion-weighted imaging"
-    },
-    {
-      "@id": "https://openminds.ebrains.eu/instances/technique/electroencephalography",
-      "@type": "https://openminds.ebrains.eu/controlledTerms/Technique",
-      "name": "electroencephalography"
-    },
     {
       "@id": "_:000093",
-      "@type": "https://openminds.ebrains.eu/core/Dataset",
+      "@type": "https://openminds.om-i.org/types/Dataset",
       "author": [
         {
           "@id": "_:000079"
@@ -1939,6 +1880,89 @@
         }
       ],
       "shortName": "EEG, fMRI and NODDI at rest'"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/contentTypes/application_vnd.bids",
+      "@type": "https://openminds.om-i.org/types/ContentType",
+      "name": "application/vnd.bids",
+      "synonym": [
+        "BIDS"
+      ]
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/dataType/voxelData",
+      "@type": "https://openminds.om-i.org/types/DataType",
+      "definition": "'Voxel data' is a matrix defining values (scalars, lists, or matrices) on a grid in a three dimensional space, which can be rendered to raster graphic.",
+      "name": "voxel data"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/experimentalApproach/anatomy",
+      "@type": "https://openminds.om-i.org/types/ExperimentalApproach",
+      "definition": "Any experimental approach focused on the bodily structure of living organisms.",
+      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0739411",
+      "name": "anatomy",
+      "preferredOntologyIdentifier": "http://uri.interlex.org/tgbugs/uris/readable/modality/Anatomy",
+      "synonym": [
+        "anatomical approach"
+      ]
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/experimentalApproach/electrophysiology",
+      "@type": "https://openminds.om-i.org/types/ExperimentalApproach",
+      "definition": "Any experimental approach focused on electrical phenomena associated with living systems, most notably the nervous system, cardiac system, and musculoskeletal system.",
+      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0741202",
+      "name": "electrophysiology",
+      "preferredOntologyIdentifier": "http://uri.interlex.org/tgbugs/uris/readable/modality/Electrophysiology"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/experimentalApproach/neuralConnectivity",
+      "@type": "https://openminds.om-i.org/types/ExperimentalApproach",
+      "definition": "Any experimental approach focused on functional or anatomical connections between single neurons or populations of neurons in defined anatomical regions.",
+      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0739393",
+      "name": "neural connectivity",
+      "preferredOntologyIdentifier": "http://uri.interlex.org/tgbugs/uris/readable/modality/Connectivity"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/experimentalApproach/neuroimaging",
+      "@type": "https://openminds.om-i.org/types/ExperimentalApproach",
+      "definition": "Any experimental approach focused on the non-invasive direct or indirect imaging of the structure, function, or pharmacology of the nervous system.",
+      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0741206",
+      "name": "neuroimaging",
+      "preferredOntologyIdentifier": "http://uri.interlex.org/tgbugs/uris/readable/modality/Neuroimaging"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/semanticDataType/rawData",
+      "@type": "https://openminds.om-i.org/types/SemanticDataType",
+      "name": "raw data"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/species/homoSapiens",
+      "@type": "https://openminds.om-i.org/types/Species",
+      "definition": "The species *Homo sapiens* (humans) belongs to the family of *hominidae* (great apes).",
+      "interlexIdentifier": "http://uri.interlex.org/base/ilx_0105114",
+      "knowledgeSpaceLink": "https://knowledge-space.org/wiki/NCBITaxon:9606#human",
+      "name": "Homo sapiens",
+      "preferredOntologyIdentifier": "http://purl.obolibrary.org/obo/NCBITaxon_9606",
+      "synonym": [
+        "homo sapien",
+        "human",
+        "man"
+      ]
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/technique/diffusionWeightedImaging",
+      "@type": "https://openminds.om-i.org/types/Technique",
+      "name": "diffusion-weighted imaging"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/technique/electroencephalography",
+      "@type": "https://openminds.om-i.org/types/Technique",
+      "name": "electroencephalography"
+    },
+    {
+      "@id": "https://openminds.om-i.org/instances/unitOfMeasurement/byte",
+      "@type": "https://openminds.om-i.org/types/UnitOfMeasurement",
+      "name": "byte"
     }
   ]
-}
+}
\ No newline at end of file
diff --git a/test/test_bids_examples.py b/test/test_bids_examples.py
index 71d92de..064f1b8 100644
--- a/test/test_bids_examples.py
+++ b/test/test_bids_examples.py
@@ -19,7 +19,7 @@ def test_example_datasets(dataset_label, dataset_subject_number, dataset_subject
     test_dir = os.path.join("bids-examples", dataset_label)
     bids2openminds.converter.convert(test_dir, save_output=True)
     c = Collection()
-    c.load(os.path.join(test_dir, "openminds.jsonld"), version="v3")
+    c.load(os.path.join(test_dir, "openminds.jsonld"), version="v4")
 
     subject_number = 0
     subject_state_number = 0
@@ -30,18 +30,18 @@ def test_example_datasets(dataset_label, dataset_subject_number, dataset_subject
     subject_state_number_besed_on_subject = 0
 
     for item in c:
-        if item.type_ == "https://openminds.ebrains.eu/core/Subject":
+        if item.type_ == "https://openminds.om-i.org/types/Subject":
             subject_number += 1
             subject_state_number_besed_on_subject += len(item.studied_states)
-        if item.type_ == "https://openminds.ebrains.eu/core/SubjectState":
+        if item.type_ == "https://openminds.om-i.org/types/SubjectState":
             subject_state_number += 1
-        if item.type_ == "https://openminds.ebrains.eu/core/Person":
+        if item.type_ == "https://openminds.om-i.org/types/Person":
             person_number += 1
-        if item.type_ == "https://openminds.ebrains.eu/core/File":
+        if item.type_ == "https://openminds.om-i.org/types/File":
             files_number += 1
-        if item.type_ == "https://openminds.ebrains.eu/core/FileBundle":
+        if item.type_ == "https://openminds.om-i.org/types/FileBundle":
             file_bundles_number += 1
-        if item.type_ == "https://openminds.ebrains.eu/core/BehavioralProtocol":
+        if item.type_ == "https://openminds.om-i.org/types/BehavioralProtocol":
             behavioral_protocol_number += 1
 
     assert dataset_subject_number == subject_number
diff --git a/test/test_example_datasets_click.py b/test/test_example_datasets_click.py
index 8b476ad..6eef09c 100644
--- a/test/test_example_datasets_click.py
+++ b/test/test_example_datasets_click.py
@@ -13,7 +13,7 @@ def test_example_datasets_click():
     result = runner.invoke(convert_click, [test_dir])
     assert result.exit_code == 0
     c = Collection()
-    c.load(os.path.join(test_dir, "openminds.jsonld"), version="v3")
+    c.load(os.path.join(test_dir, "openminds.jsonld"), version="v4")
 
 
 def test_example_datasets_click_seperate_files():
@@ -36,4 +36,4 @@ def test_example_datasets_click_output_location():
         convert_click, ["-o", openminds_file, test_dir])
     assert result.exit_code == 0
     c = Collection()
-    c.load(openminds_file, version="v3")
+    c.load(openminds_file, version="v4")
diff --git a/test/test_file_bundle.py b/test/test_file_bundle.py
index 7becca5..847dd08 100644
--- a/test/test_file_bundle.py
+++ b/test/test_file_bundle.py
@@ -50,7 +50,7 @@ def test_number_file_bundle(generate_file_bundle_collection):
     _, collection, _ = generate_file_bundle_collection
     m = 0
     for item in collection:
-        if item.type_ == "https://openminds.ebrains.eu/core/FileBundle":
+        if item.type_ == "https://openminds.om-i.org/types/FileBundle":
             m += 1
     assert m == number_of_openminds_bundle
 
@@ -82,7 +82,7 @@ def test_random_folder(test_dir, path_list, bundle, parent_bundle, generate_file
     dataset_bundle = None
 
     for item in collection:
-        if item.type_ == "https://openminds.ebrains.eu/core/FileBundle" and item.name == folder_name:
+        if item.type_ == "https://openminds.om-i.org/types/FileBundle" and item.name == folder_name:
             # detects only one file bundle have this name
             assert dataset_bundle is None
             dataset_bundle = item
@@ -94,5 +94,5 @@ def test_random_folder(test_dir, path_list, bundle, parent_bundle, generate_file
     if parent_bundle is not None:
         assert dataset_bundle.is_part_of.name == parent_bundle[0]
     else:
-        assert dataset_bundle.is_part_of.type_ == "https://openminds.ebrains.eu/core/FileRepository"
+        assert dataset_bundle.is_part_of.type_ == "https://openminds.om-i.org/types/FileRepository"
         assert dataset_bundle.is_part_of.iri.value == file_repository_iri
diff --git a/test/test_person.py b/test/test_person.py
index 6dd5371..de33198 100644
--- a/test/test_person.py
+++ b/test/test_person.py
@@ -1,7 +1,7 @@
 # test for create_openminds_person function in the main
 import pytest
 from bids2openminds.main import create_openminds_person
-import openminds.v3.core as omcore
+import openminds.v4.core as omcore
 
 # Test data: (full_name, given_name, family_name)
 example_names = [("John Ronald Reuel Tolkien", "John Ronald Reuel", "Tolkien"),
diff --git a/test/test_subject_age.py b/test/test_subject_age.py
index 96b0bb0..1c43ab0 100644
--- a/test/test_subject_age.py
+++ b/test/test_subject_age.py
@@ -11,11 +11,11 @@ def test_subject_age(age, age_type):
     data_subject_table = pd.DataFrame(data={'age': [age]})
     openminds_age = create_openminds_age(data_subject_table)
     if age_type == "QuantitativeValueRange":
-        assert openminds_age.type_ == 'https://openminds.ebrains.eu/core/QuantitativeValueRange'
+        assert openminds_age.type_ == 'https://openminds.om-i.org/types/QuantitativeValueRange'
         assert openminds_age.max_value is None
         assert openminds_age.min_value == 89
     if age_type == "QuantitativeValue":
-        assert openminds_age.type_ == 'https://openminds.ebrains.eu/core/QuantitativeValue'
+        assert openminds_age.type_ == 'https://openminds.om-i.org/types/QuantitativeValue'
         assert openminds_age.value == age
     if age_type == None:
         assert openminds_age is None
diff --git a/test/test_thorough_bids_example.py b/test/test_thorough_bids_example.py
index 5514ed5..d071633 100644
--- a/test/test_thorough_bids_example.py
+++ b/test/test_thorough_bids_example.py
@@ -31,12 +31,12 @@ def load_collections():
             file.write(actual_data)
 
         reference_collection = Collection()
-        reference_collection.load(tempdir+test_standard_name, version="v3")
+        reference_collection.load(tempdir+test_standard_name, version="v4")
 
         bids2openminds.converter.convert(test_dataset, save_output=True)
         generated_collection = Collection()
         generated_collection.load(os.path.join(
-            test_dataset, "openminds.jsonld"), version="v3")
+            test_dataset, "openminds.jsonld"), version="v4")
 
         collections[dataset_label] = (
             reference_collection, generated_collection)
@@ -46,7 +46,7 @@ def load_collections():
 
 
 def detect_type(collection, type):
-    type_IRI = "https://openminds.ebrains.eu/core/" + type
+    type_IRI = "https://openminds.om-i.org/types/" + type
     items_list = []
     for item in collection:
         if item.type_ == type_IRI:
@@ -164,6 +164,6 @@ def test_file_bundle(load_collections, dataset_label):
         generated_file_bundle = find_name(
             refrence_file_bundle.name, generated_file_bundles)
         assert generated_file_bundle is not None
-        if refrence_file_bundle.is_part_of.type_ == "https://openminds.ebrains.eu/core/FileBundle":
-            assert generated_file_bundle.is_part_of.type_ == "https://openminds.ebrains.eu/core/FileBundle"
+        if refrence_file_bundle.is_part_of.type_ == "https://openminds.om-i.org/types/FileBundle":
+            assert generated_file_bundle.is_part_of.type_ == "https://openminds.om-i.org/types/FileBundle"
             assert refrence_file_bundle.is_part_of.name == generated_file_bundle.is_part_of.name