diff --git a/data/biobank-directory/demo/AlsoKnownIn.csv b/data/biobank-directory/demo/AlsoKnownIn.csv
index cc6c637df45..6b313bd33ca 100644
--- a/data/biobank-directory/demo/AlsoKnownIn.csv
+++ b/data/biobank-directory/demo/AlsoKnownIn.csv
@@ -2,4 +2,4 @@ id,name_system,pid,url,national_node,label
 bbmri-eric:akiID:NL_00001,Catalogue in The Netherlands,cat_neth_biobank2,https://linktopid/cat_neth_biobank2.nl,NL,Catalogue in The Netherlands
 bbmri-eric:akiID:NL_00002,Collection catalogue of The Netherlands,,https://collections@catalogue.nl,NL,Collection catalogue of The Netherlands
 bbmri-eric:akiID:DE_00001,Another DataCatalogue,,https://another_data_catalogue.eu,DE,Another DataCatalogue
-bbmri-eric:akiID:DE_00002,A catalogue of studies,,https://a_study_catalogue.eu/112233,,A Catalogue With Studies
\ No newline at end of file
+bbmri-eric:akiID:DE_00002,A catalogue of studies,,https://a_study_catalogue.eu/112233,EXT,A Catalogue With Studies
\ No newline at end of file
diff --git a/data/biobank-directory/demo/Studies.csv b/data/biobank-directory/demo/Studies.csv
index 15bbadc11ec..d709f2bd369 100644
--- a/data/biobank-directory/demo/Studies.csv
+++ b/data/biobank-directory/demo/Studies.csv
@@ -1,2 +1,2 @@
-id,title,description,type,sex,age_high,age_low,age_unit,also_known
-bbmri-eric:studyID:DE_112233,Dummy study,This is just a fake study with demo data,Interventional,"FEMALE,MALE",10,50,YEAR,bbmri-eric:akiID:DE_00002
+id,title,description,type,sex,age_high,age_low,age_unit,also_known,national_node
+bbmri-eric:studyID:DE_112233,Dummy study,This is just a fake study with demo data,Interventional,"FEMALE,MALE",10,50,YEAR,bbmri-eric:akiID:DE_00002,EXT
diff --git a/data/biobank-directory/molgenis.csv b/data/biobank-directory/molgenis.csv
index 2d16573f4f3..a71b76fac9e 100644
--- a/data/biobank-directory/molgenis.csv
+++ b/data/biobank-directory/molgenis.csv
@@ -12,7 +12,7 @@ AlsoKnownIn,,id,ID,string,1,true,true,Unique ID.,,,,,,,,,
 AlsoKnownIn,,name_system,Name of the System,string,,true,,"Name of the source in which the biobank, collection or network also exists.",,,,,,,,,
 AlsoKnownIn,,pid,Persistent Identifier,string,,false,,"Persistent Identifier of the biobank, collection or network in the other source.",,,,,,,,,
 AlsoKnownIn,,url,URL,hyperlink,,true,,"Link to the biobank, collection or network in the other source.",,,,,,,,,
-AlsoKnownIn,,national_node,National Node,ref,,false,,"The biobank, collection or network where this also known In refers to originates from this national node.",,NationalNodes,,${description},,,,,
+AlsoKnownIn,,national_node,National Node,ref,,true,,"The biobank, collection or network where this also known In refers to originates from this national node.",,NationalNodes,,${description},,,,,
 AlsoKnownIn,,label,Name of the System,string,,false,true,"Name of the source in which the biobank, collection or network also exists.",,,,,,,,name_system,
 Biobanks,,,,,,,,"Description of the biobank organisation, like name, location, network, contact person, collaboration opportunities and quality assessments.",,,,,,,,,
 Biobanks,,id,ID,string,1,true,true,"Unique biobank ID within BBMRI-ERIC based on MIABIS 2.0 standard (ISO 3166-1 alpha-2 + underscore + biobank national ID or name), prefixed with bbmri-eric:ID: string - MIABIS-2.0-01.",,,,,,,,,
@@ -175,3 +175,4 @@ Studies,,age_unit,Age Unit,ontology,,false,,"Unit defining Age Low and Age High.
 Studies,,number_of_subjects,Number of subjects,int,,false,,"The number of subjects that participated to the study",,,,,,,,,
 Studies,,also_known,Also Known In,ref_array,,false,,The study also exists in …,,AlsoKnownIn,,${name_system},,,,,
 Studies,,collections,Collections,refback,,false,true,,,Collections,study,,,,,,
+Studies,,national_node,National Node,ref,,true,,The study originates from this national node.,,NationalNodes,,${description},,,,,
\ No newline at end of file