diff --git a/app/graphql/schema.graphql b/app/graphql/schema.graphql
index 5083210b6..4d97a2585 100644
--- a/app/graphql/schema.graphql
+++ b/app/graphql/schema.graphql
@@ -4962,6 +4962,26 @@ type InteractiveResourceEdge {
   node: InteractiveResource
 }
 
+"""
+Information about ISSN
+"""
+type Issn {
+  """
+  The electronic ISSN
+  """
+  electronic: String
+
+  """
+  The ISSNL
+  """
+  issnl: String
+
+  """
+  The print ISSN
+  """
+  print: String
+}
+
 """
 Information about providers
 """
@@ -8359,11 +8379,21 @@ type Repository {
   """
   alternateName: String
 
+  """
+  The certificate(s) for the repository
+  """
+  certificate: [String!]
+
   """
   The number of citations.
   """
   citationCount: Int
 
+  """
+  The client type (repository or periodical)
+  """
+  clientType: String
+
   """
   Datasets managed by the repository
   """
@@ -8416,6 +8446,16 @@ type Repository {
   """
   id: ID!
 
+  """
+  The ISSN
+  """
+  issn: Issn
+
+  """
+  The langauge of the repository
+  """
+  language: [String!]
+
   """
   Repository name
   """
@@ -8487,6 +8527,11 @@ type Repository {
   """
   re3data: ID
 
+  """
+  The repository type(s)
+  """
+  repositoryType: [String!]
+
   """
   The name of the software that is used to run the repository
   """
diff --git a/app/graphql/types/issn_type.rb b/app/graphql/types/issn_type.rb
new file mode 100644
index 000000000..c6e13ad84
--- /dev/null
+++ b/app/graphql/types/issn_type.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class IssnType < BaseObject
+  description "Information about ISSN"
+
+  field :issnl, String, null: true, description: "The ISSNL"
+  field :electronic, String, null: true, description: "The electronic ISSN"
+  field :print, String, null: true, description: "The print ISSN"
+end
diff --git a/app/graphql/types/repository_type.rb b/app/graphql/types/repository_type.rb
index ab36993dc..ef626b973 100644
--- a/app/graphql/types/repository_type.rb
+++ b/app/graphql/types/repository_type.rb
@@ -5,12 +5,18 @@ class RepositoryType < BaseObject
 
   field :id, ID, null: false, hash_key: "uid", description: "Unique identifier for each repository"
   field :type, String, null: false, description: "The type of the item."
+  field :re3data, ID, null: true, description: "The re3data identifier for the repository"
   field :name, String, null: false, description: "Repository name"
   field :alternate_name, String, null: true, description: "Repository alternate name"
-  field :re3data, ID, null: true, description: "The re3data identifier for the repository"
   field :description, String, null: true, description: "Description of the repository"
   field :url, Url, null: true, description: "The homepage of the repository"
   field :software, String, null: true, description: "The name of the software that is used to run the repository"
+  field :client_type, String, null: true, description: "The client type (repository or periodical)"
+  field :repository_type, [String], null: true, description: "The repository type(s)"
+  field :certificate, [String], null: true, description: "The certificate(s) for the repository"
+  field :language, [String], null: true, description: "The langauge of the repository"
+  field :issn, IssnType, null: true, description: "The ISSN"
+    
   field :view_count, Integer, null: true, description: "The number of views according to the Counter Code of Practice."
   field :download_count, Integer, null: true, description: "The number of downloads according to the Counter Code of Practice."
   field :citation_count, Integer, null: true, description: "The number of citations."
diff --git a/spec/graphql/types/issn_type_spec.rb b/spec/graphql/types/issn_type_spec.rb
new file mode 100644
index 000000000..32f13ec78
--- /dev/null
+++ b/spec/graphql/types/issn_type_spec.rb
@@ -0,0 +1,11 @@
+require "rails_helper"
+
+describe IssnType do
+  describe "fields" do
+    subject { described_class }
+
+    it { is_expected.to have_field(:issnl).of_type("String") }
+    it { is_expected.to have_field(:electronic).of_type("String") }
+    it { is_expected.to have_field(:print).of_type("String") }
+  end
+end
diff --git a/spec/graphql/types/repository_type_spec.rb b/spec/graphql/types/repository_type_spec.rb
index 867c38129..d42c4a210 100644
--- a/spec/graphql/types/repository_type_spec.rb
+++ b/spec/graphql/types/repository_type_spec.rb
@@ -6,9 +6,18 @@
 
     it { is_expected.to have_field(:id).of_type(!types.ID) }
     it { is_expected.to have_field(:type).of_type("String!") }
+    it { is_expected.to have_field(:re3data).of_type(types.ID) }
     it { is_expected.to have_field(:name).of_type("String!") }
     it { is_expected.to have_field(:alternateName).of_type("String") }
     it { is_expected.to have_field(:description).of_type("String") }
+    it { is_expected.to have_field(:url).of_type("Url") }
+    it { is_expected.to have_field(:software).of_type("String") }
+    it { is_expected.to have_field(:clientType).of_type("String") }
+    it { is_expected.to have_field(:repositoryType).of_type("[String!]") }
+    it { is_expected.to have_field(:certificate).of_type("[String!]") }
+    it { is_expected.to have_field(:language).of_type("[String!]") }
+    it { is_expected.to have_field(:issn).of_type("Issn") }
+
     it { is_expected.to have_field(:datasets).of_type("DatasetConnection") }
     it { is_expected.to have_field(:publications).of_type("PublicationConnection") }
     it { is_expected.to have_field(:softwares).of_type("SoftwareConnection") }