diff --git a/aspnetcore/src/ElasticService/ElasticSearchQueryGenerators/PublicationQueryGenerator.cs b/aspnetcore/src/ElasticService/ElasticSearchQueryGenerators/PublicationQueryGenerator.cs
index 62f3537..e659f3e 100644
--- a/aspnetcore/src/ElasticService/ElasticSearchQueryGenerators/PublicationQueryGenerator.cs
+++ b/aspnetcore/src/ElasticService/ElasticSearchQueryGenerators/PublicationQueryGenerator.cs
@@ -231,18 +231,22 @@ private static IEnumerable<Func<QueryContainerDescriptor<Publication>, QueryCont
                     .Value(parameters.AuthorOrcId)));
         }
         
-        if (parameters.TypeCode is not null)
+        // Searching with type code requires exact match.
+        if (!string.IsNullOrWhiteSpace(parameters.TypeCode))
         {
-            filters.Add(t =>
-                t.Term(s => s.Field(f => f.Type)
-                    .Value(parameters.TypeCode)));
+            filters.Add(t => t.Term(term => term
+                .Field(f => f.Type!.Code)
+                .Value(parameters.TypeCode)
+            ));
         }
-        
-        if (parameters.PublisherOpenAccess is not null)
+
+        // Searching with publisher open access code requires exact match.
+        if (!string.IsNullOrWhiteSpace(parameters.PublisherOpenAccess))
         {
-            filters.Add(t =>
-                t.Term(s => s.Field(f => f.PublisherOpenAccess)
-                    .Value(parameters.PublisherOpenAccess)));
+            filters.Add(t => t.Term(term => term
+                .Field(f => f.PublisherOpenAccess!.Code)
+                .Value(parameters.PublisherOpenAccess)
+            ));
         }
         
         if (parameters.Issn is not null)
@@ -274,11 +278,13 @@ private static IEnumerable<Func<QueryContainerDescriptor<Publication>, QueryCont
                     .Value(parameters.Doi)));
         }
 
-        if (parameters.Status is not null)
+        // Searching with status requires exact match.
+        if (!string.IsNullOrWhiteSpace(parameters.Status))
         {
-            filters.Add(t =>
-                t.Term(s => s.Field(f => f.Status)
-                    .Value(parameters.Status)));
+            filters.Add(t => t.Term(term => term
+                .Field(f => f.Status!.Code)
+                .Value(parameters.Status)
+            ));
         }
 
         return filters;
diff --git a/aspnetcore/src/Interface/Maps/PublicationProfile.cs b/aspnetcore/src/Interface/Maps/PublicationProfile.cs
index 1094cb0..812760f 100644
--- a/aspnetcore/src/Interface/Maps/PublicationProfile.cs
+++ b/aspnetcore/src/Interface/Maps/PublicationProfile.cs
@@ -17,7 +17,7 @@ public PublicationProfile()
         AllowNullDestinationValues = true;
         
         CreateMap<GetPublicationsQueryParameters, PublicationSearchParameters>()
-            .ForMember(dst => dst.TypeCode, opt => opt.MapFrom(src =>  src.Type!.ToLower()));
+            .ForMember(dst => dst.TypeCode, opt => opt.MapFrom(src =>  src.Type!));
         
         CreateMap<Service.Models.Publication.Publication, Publication>()
             .ForMember(dst => dst.PublicationYear, opt => opt.MapFrom(src =>  src.PublicationYear.HasValue ? src.PublicationYear.Value.ToString(DateTimeYearFormat) : null))
diff --git a/aspnetcore/src/Service.Models/ReferenceData.cs b/aspnetcore/src/Service.Models/ReferenceData.cs
index 5f6f23c..85207b6 100644
--- a/aspnetcore/src/Service.Models/ReferenceData.cs
+++ b/aspnetcore/src/Service.Models/ReferenceData.cs
@@ -6,7 +6,6 @@ public class ReferenceData
 {
     [Keyword]
     public string? Code { get; set; }
-
     public string? NameFi { get; set; }
     public string? NameSv { get; set; }
     public string? NameEn { get; set; }