diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
index d711a406409..15228ef7dda 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
@@ -5594,9 +5594,9 @@ public class DefaultCodegen implements CodegenConfig {
         } else if (Parameter.StyleEnum.SIMPLE.equals(parameter.getStyle())) {
             return "csv";
         } else if (Parameter.StyleEnum.PIPEDELIMITED.equals(parameter.getStyle())) {
-            return "pipe";
+            return "pipes";
         } else if (Parameter.StyleEnum.SPACEDELIMITED.equals(parameter.getStyle())) {
-            return "space";
+            return "ssv";
         } else {
             return null;
         }
diff --git a/samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs b/samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs
index df3d3f14670..10fd8f0804c 100644
--- a/samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs
+++ b/samples/client/petstore/csharp-netcore/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs
@@ -2671,7 +2671,7 @@ namespace Org.OpenAPITools.Api
 
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "pipe", pipe));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "ioutil", ioutil));
-            localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("space", "http", http));
+            localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("ssv", "http", http));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "url", url));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("multi", "context", context));
 
@@ -2754,7 +2754,7 @@ namespace Org.OpenAPITools.Api
             
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "pipe", pipe));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "ioutil", ioutil));
-            localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("space", "http", http));
+            localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("ssv", "http", http));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "url", url));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("multi", "context", context));
 
diff --git a/samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Api/FakeApi.cs b/samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Api/FakeApi.cs
index df3d3f14670..10fd8f0804c 100644
--- a/samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Api/FakeApi.cs
+++ b/samples/client/petstore/csharp-netcore/OpenAPIClientCore/src/Org.OpenAPITools/Api/FakeApi.cs
@@ -2671,7 +2671,7 @@ namespace Org.OpenAPITools.Api
 
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "pipe", pipe));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "ioutil", ioutil));
-            localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("space", "http", http));
+            localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("ssv", "http", http));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "url", url));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("multi", "context", context));
 
@@ -2754,7 +2754,7 @@ namespace Org.OpenAPITools.Api
             
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "pipe", pipe));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "ioutil", ioutil));
-            localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("space", "http", http));
+            localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("ssv", "http", http));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("csv", "url", url));
             localVarRequestOptions.QueryParameters.Add(Org.OpenAPITools.Client.ClientUtils.ParameterToMultiMap("multi", "context", context));
 
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs
index 6ed5af7439d..45b78bb8db0 100644
--- a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs
@@ -3004,7 +3004,7 @@ namespace Org.OpenAPITools.Api
 
             if (pipe != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("csv", "pipe", pipe)); // query parameter
             if (ioutil != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("csv", "ioutil", ioutil)); // query parameter
-            if (http != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("space", "http", http)); // query parameter
+            if (http != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("ssv", "http", http)); // query parameter
             if (url != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("csv", "url", url)); // query parameter
             if (context != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("multi", "context", context)); // query parameter
 
@@ -3095,7 +3095,7 @@ namespace Org.OpenAPITools.Api
 
             if (pipe != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("csv", "pipe", pipe)); // query parameter
             if (ioutil != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("csv", "ioutil", ioutil)); // query parameter
-            if (http != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("space", "http", http)); // query parameter
+            if (http != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("ssv", "http", http)); // query parameter
             if (url != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("csv", "url", url)); // query parameter
             if (context != null) localVarQueryParams.AddRange(this.Configuration.ApiClient.ParameterToKeyValuePairs("multi", "context", context)); // query parameter
 
diff --git a/samples/client/petstore/go-experimental/go-petstore/api_fake.go b/samples/client/petstore/go-experimental/go-petstore/api_fake.go
index 2466fa119af..59903c214ee 100644
--- a/samples/client/petstore/go-experimental/go-petstore/api_fake.go
+++ b/samples/client/petstore/go-experimental/go-petstore/api_fake.go
@@ -1710,7 +1710,7 @@ func (r apiTestQueryParameterCollectionFormatRequest) Execute() (*_nethttp.Respo
 
 	localVarQueryParams.Add("pipe", parameterToString(*r.pipe, "csv"))
 	localVarQueryParams.Add("ioutil", parameterToString(*r.ioutil, "csv"))
-	localVarQueryParams.Add("http", parameterToString(*r.http, "space"))
+	localVarQueryParams.Add("http", parameterToString(*r.http, "ssv"))
 	localVarQueryParams.Add("url", parameterToString(*r.url, "csv"))
 	{
 		t := *r.context
diff --git a/samples/client/petstore/go/go-petstore-withXml/api_fake.go b/samples/client/petstore/go/go-petstore-withXml/api_fake.go
index 5d60b36436c..2c5f9b2149b 100644
--- a/samples/client/petstore/go/go-petstore-withXml/api_fake.go
+++ b/samples/client/petstore/go/go-petstore-withXml/api_fake.go
@@ -1170,7 +1170,7 @@ func (a *FakeApiService) TestQueryParameterCollectionFormat(ctx _context.Context
 
 	localVarQueryParams.Add("pipe", parameterToString(pipe, "csv"))
 	localVarQueryParams.Add("ioutil", parameterToString(ioutil, "csv"))
-	localVarQueryParams.Add("http", parameterToString(http, "space"))
+	localVarQueryParams.Add("http", parameterToString(http, "ssv"))
 	localVarQueryParams.Add("url", parameterToString(url, "csv"))
 	{
 		t:=context
diff --git a/samples/client/petstore/go/go-petstore/api_fake.go b/samples/client/petstore/go/go-petstore/api_fake.go
index ac3402fe4e4..5978577ddff 100644
--- a/samples/client/petstore/go/go-petstore/api_fake.go
+++ b/samples/client/petstore/go/go-petstore/api_fake.go
@@ -1169,7 +1169,7 @@ func (a *FakeApiService) TestQueryParameterCollectionFormat(ctx _context.Context
 
 	localVarQueryParams.Add("pipe", parameterToString(pipe, "csv"))
 	localVarQueryParams.Add("ioutil", parameterToString(ioutil, "csv"))
-	localVarQueryParams.Add("http", parameterToString(http, "space"))
+	localVarQueryParams.Add("http", parameterToString(http, "ssv"))
 	localVarQueryParams.Add("url", parameterToString(url, "csv"))
 	{
 		t:=context
diff --git a/samples/client/petstore/java/feign10x/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/feign10x/src/main/java/org/openapitools/client/api/FakeApi.java
index 69cc2a9064f..7648f4c650f 100644
--- a/samples/client/petstore/java/feign10x/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/feign10x/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -407,7 +407,7 @@ public interface FakeApi extends ApiClient.Api {
       return this;
     }
     public TestQueryParameterCollectionFormatQueryParams http(final List<String> value) {
-      put("http", EncodingUtils.encodeCollection(value, "space"));
+      put("http", EncodingUtils.encodeCollection(value, "ssv"));
       return this;
     }
     public TestQueryParameterCollectionFormatQueryParams url(final List<String> value) {
diff --git a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/api/FakeApi.java
index ea1d42bae88..3c3ca7c4c9c 100644
--- a/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/jersey1/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -760,7 +760,7 @@ if (param2 != null)
 
     localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "pipe", pipe));
     localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "ioutil", ioutil));
-    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("space", "http", http));
+    localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("ssv", "http", http));
     localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("csv", "url", url));
     localVarCollectionQueryParams.addAll(apiClient.parameterToPairs("multi", "context", context));
 
diff --git a/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/api/FakeApi.java
index e3fa8df3bdd..d82160dce46 100644
--- a/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -1174,7 +1174,7 @@ if (param2 != null)
 
     localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "pipe", pipe));
     localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "ioutil", ioutil));
-    localVarQueryParams.addAll(apiClient.parameterToPairs("space", "http", http));
+    localVarQueryParams.addAll(apiClient.parameterToPairs("ssv", "http", http));
     localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "url", url));
     localVarQueryParams.addAll(apiClient.parameterToPairs("multi", "context", context));
 
diff --git a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/api/FakeApi.java
index f2009364b7d..db15514520e 100644
--- a/samples/client/petstore/java/native/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/native/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -837,7 +837,7 @@ public class FakeApi {
     List<Pair> localVarQueryParams = new ArrayList<>();
     localVarQueryParams.addAll(ApiClient.parameterToPairs("csv", "pipe", pipe));
     localVarQueryParams.addAll(ApiClient.parameterToPairs("csv", "ioutil", ioutil));
-    localVarQueryParams.addAll(ApiClient.parameterToPairs("space", "http", http));
+    localVarQueryParams.addAll(ApiClient.parameterToPairs("ssv", "http", http));
     localVarQueryParams.addAll(ApiClient.parameterToPairs("csv", "url", url));
     localVarQueryParams.addAll(ApiClient.parameterToPairs("multi", "context", context));
 
diff --git a/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/org/openapitools/client/api/FakeApi.java
index 121867dd07a..657e2dfd968 100644
--- a/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/okhttp-gson-parcelableModel/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -1791,7 +1791,7 @@ public class FakeApi {
         }
 
         if (http != null) {
-            localVarCollectionQueryParams.addAll(localVarApiClient.parameterToPairs("space", "http", http));
+            localVarCollectionQueryParams.addAll(localVarApiClient.parameterToPairs("ssv", "http", http));
         }
 
         if (url != null) {
diff --git a/samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/api/FakeApi.java
index 121867dd07a..657e2dfd968 100644
--- a/samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/okhttp-gson/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -1791,7 +1791,7 @@ public class FakeApi {
         }
 
         if (http != null) {
-            localVarCollectionQueryParams.addAll(localVarApiClient.parameterToPairs("space", "http", http));
+            localVarCollectionQueryParams.addAll(localVarApiClient.parameterToPairs("ssv", "http", http));
         }
 
         if (url != null) {
diff --git a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/api/FakeApi.java
index 34b1bf25878..bd2b2386f2b 100644
--- a/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/resteasy/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -732,7 +732,7 @@ if (param2 != null)
 
     localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "pipe", pipe));
     localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "ioutil", ioutil));
-    localVarQueryParams.addAll(apiClient.parameterToPairs("space", "http", http));
+    localVarQueryParams.addAll(apiClient.parameterToPairs("ssv", "http", http));
     localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "url", url));
     localVarQueryParams.addAll(apiClient.parameterToPairs("multi", "context", context));
 
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/FakeApi.java
index 16ef8456325..2c5be6cd0ec 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -852,7 +852,7 @@ public class FakeApi {
 
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "pipe", pipe));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "ioutil", ioutil));
-        queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("space".toUpperCase(Locale.ROOT)), "http", http));
+        queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("ssv".toUpperCase(Locale.ROOT)), "http", http));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "url", url));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("multi".toUpperCase(Locale.ROOT)), "context", context));
 
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/FakeApi.java
index 16ef8456325..2c5be6cd0ec 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -852,7 +852,7 @@ public class FakeApi {
 
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "pipe", pipe));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "ioutil", ioutil));
-        queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("space".toUpperCase(Locale.ROOT)), "http", http));
+        queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("ssv".toUpperCase(Locale.ROOT)), "http", http));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "url", url));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("multi".toUpperCase(Locale.ROOT)), "context", context));
 
diff --git a/samples/client/petstore/java/retrofit2-play24/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/retrofit2-play24/src/main/java/org/openapitools/client/api/FakeApi.java
index 0c05259fb1e..b1a773c63d7 100644
--- a/samples/client/petstore/java/retrofit2-play24/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/retrofit2-play24/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -230,7 +230,7 @@ public interface FakeApi {
    */
   @PUT("fake/test-query-paramters")
   F.Promise<Response<Void>> testQueryParameterCollectionFormat(
-    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SPACEParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
+    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SSVParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
   );
 
 }
diff --git a/samples/client/petstore/java/retrofit2-play25/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/retrofit2-play25/src/main/java/org/openapitools/client/api/FakeApi.java
index f8a5c1f9ec2..a9c8e3f16da 100644
--- a/samples/client/petstore/java/retrofit2-play25/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/retrofit2-play25/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -230,7 +230,7 @@ public interface FakeApi {
    */
   @PUT("fake/test-query-paramters")
   CompletionStage<Response<Void>> testQueryParameterCollectionFormat(
-    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SPACEParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
+    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SSVParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
   );
 
 }
diff --git a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/api/FakeApi.java
index f8a5c1f9ec2..a9c8e3f16da 100644
--- a/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/retrofit2-play26/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -230,7 +230,7 @@ public interface FakeApi {
    */
   @PUT("fake/test-query-paramters")
   CompletionStage<Response<Void>> testQueryParameterCollectionFormat(
-    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SPACEParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
+    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SSVParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
   );
 
 }
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeApi.java
index d536945d5d4..dbaa2f6d1b7 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -225,7 +225,7 @@ public interface FakeApi {
    */
   @PUT("fake/test-query-paramters")
   Call<Void> testQueryParameterCollectionFormat(
-    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SPACEParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
+    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SSVParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
   );
 
 }
diff --git a/samples/client/petstore/java/retrofit2rx/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/retrofit2rx/src/main/java/org/openapitools/client/api/FakeApi.java
index b17c3d20f2b..438c244adc7 100644
--- a/samples/client/petstore/java/retrofit2rx/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/retrofit2rx/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -225,7 +225,7 @@ public interface FakeApi {
    */
   @PUT("fake/test-query-paramters")
   Observable<Void> testQueryParameterCollectionFormat(
-    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SPACEParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
+    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SSVParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
   );
 
 }
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeApi.java
index 82a7657309f..a2d7e57449e 100644
--- a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -226,7 +226,7 @@ public interface FakeApi {
    */
   @PUT("fake/test-query-paramters")
   Completable testQueryParameterCollectionFormat(
-    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SPACEParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
+    @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SSVParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
   );
 
 }
diff --git a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/api/FakeApiImpl.java b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/api/FakeApiImpl.java
index e32629442fd..70b3577d960 100644
--- a/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/api/FakeApiImpl.java
+++ b/samples/client/petstore/java/vertx/src/main/java/org/openapitools/client/api/FakeApiImpl.java
@@ -650,7 +650,7 @@ if (param2 != null) localVarFormParams.put("param2", param2);
         List<Pair> localVarQueryParams = new ArrayList<>();
         localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "pipe", pipe));
         localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "ioutil", ioutil));
-        localVarQueryParams.addAll(apiClient.parameterToPairs("space", "http", http));
+        localVarQueryParams.addAll(apiClient.parameterToPairs("ssv", "http", http));
         localVarQueryParams.addAll(apiClient.parameterToPairs("csv", "url", url));
         localVarQueryParams.addAll(apiClient.parameterToPairs("multi", "context", context));
 
diff --git a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/FakeApi.java
index f14ef82d0b2..5468d6c2c14 100644
--- a/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/webclient/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -625,7 +625,7 @@ public class FakeApi {
 
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "pipe", pipe));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "ioutil", ioutil));
-        queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("space".toUpperCase(Locale.ROOT)), "http", http));
+        queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("ssv".toUpperCase(Locale.ROOT)), "http", http));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "url", url));
         queryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("multi".toUpperCase(Locale.ROOT)), "context", context));
 
diff --git a/samples/client/petstore/javascript-es6/src/api/FakeApi.js b/samples/client/petstore/javascript-es6/src/api/FakeApi.js
index 83c4437a592..bfb8488e1bd 100644
--- a/samples/client/petstore/javascript-es6/src/api/FakeApi.js
+++ b/samples/client/petstore/javascript-es6/src/api/FakeApi.js
@@ -734,7 +734,7 @@ export default class FakeApi {
       let queryParams = {
         'pipe': this.apiClient.buildCollectionParam(pipe, 'multi'),
         'ioutil': this.apiClient.buildCollectionParam(ioutil, 'csv'),
-        'http': this.apiClient.buildCollectionParam(http, 'space'),
+        'http': this.apiClient.buildCollectionParam(http, 'ssv'),
         'url': this.apiClient.buildCollectionParam(url, 'csv'),
         'context': this.apiClient.buildCollectionParam(context, 'multi')
       };
diff --git a/samples/client/petstore/javascript-promise-es6/src/api/FakeApi.js b/samples/client/petstore/javascript-promise-es6/src/api/FakeApi.js
index ebd78bfda48..60668b32a9a 100644
--- a/samples/client/petstore/javascript-promise-es6/src/api/FakeApi.js
+++ b/samples/client/petstore/javascript-promise-es6/src/api/FakeApi.js
@@ -830,7 +830,7 @@ export default class FakeApi {
       let queryParams = {
         'pipe': this.apiClient.buildCollectionParam(pipe, 'multi'),
         'ioutil': this.apiClient.buildCollectionParam(ioutil, 'csv'),
-        'http': this.apiClient.buildCollectionParam(http, 'space'),
+        'http': this.apiClient.buildCollectionParam(http, 'ssv'),
         'url': this.apiClient.buildCollectionParam(url, 'csv'),
         'context': this.apiClient.buildCollectionParam(context, 'multi')
       };
diff --git a/samples/client/petstore/python-asyncio/petstore_api/api/fake_api.py b/samples/client/petstore/python-asyncio/petstore_api/api/fake_api.py
index e1d9ffebebf..7789acf51c3 100644
--- a/samples/client/petstore/python-asyncio/petstore_api/api/fake_api.py
+++ b/samples/client/petstore/python-asyncio/petstore_api/api/fake_api.py
@@ -2020,7 +2020,7 @@ class FakeApi(object):
             collection_formats['ioutil'] = 'csv'  # noqa: E501
         if 'http' in local_var_params and local_var_params['http'] is not None:  # noqa: E501
             query_params.append(('http', local_var_params['http']))  # noqa: E501
-            collection_formats['http'] = 'space'  # noqa: E501
+            collection_formats['http'] = 'ssv'  # noqa: E501
         if 'url' in local_var_params and local_var_params['url'] is not None:  # noqa: E501
             query_params.append(('url', local_var_params['url']))  # noqa: E501
             collection_formats['url'] = 'csv'  # noqa: E501
diff --git a/samples/client/petstore/python-tornado/petstore_api/api/fake_api.py b/samples/client/petstore/python-tornado/petstore_api/api/fake_api.py
index e1d9ffebebf..7789acf51c3 100644
--- a/samples/client/petstore/python-tornado/petstore_api/api/fake_api.py
+++ b/samples/client/petstore/python-tornado/petstore_api/api/fake_api.py
@@ -2020,7 +2020,7 @@ class FakeApi(object):
             collection_formats['ioutil'] = 'csv'  # noqa: E501
         if 'http' in local_var_params and local_var_params['http'] is not None:  # noqa: E501
             query_params.append(('http', local_var_params['http']))  # noqa: E501
-            collection_formats['http'] = 'space'  # noqa: E501
+            collection_formats['http'] = 'ssv'  # noqa: E501
         if 'url' in local_var_params and local_var_params['url'] is not None:  # noqa: E501
             query_params.append(('url', local_var_params['url']))  # noqa: E501
             collection_formats['url'] = 'csv'  # noqa: E501
diff --git a/samples/client/petstore/python/petstore_api/api/fake_api.py b/samples/client/petstore/python/petstore_api/api/fake_api.py
index e1d9ffebebf..7789acf51c3 100644
--- a/samples/client/petstore/python/petstore_api/api/fake_api.py
+++ b/samples/client/petstore/python/petstore_api/api/fake_api.py
@@ -2020,7 +2020,7 @@ class FakeApi(object):
             collection_formats['ioutil'] = 'csv'  # noqa: E501
         if 'http' in local_var_params and local_var_params['http'] is not None:  # noqa: E501
             query_params.append(('http', local_var_params['http']))  # noqa: E501
-            collection_formats['http'] = 'space'  # noqa: E501
+            collection_formats['http'] = 'ssv'  # noqa: E501
         if 'url' in local_var_params and local_var_params['url'] is not None:  # noqa: E501
             query_params.append(('url', local_var_params['url']))  # noqa: E501
             collection_formats['url'] = 'csv'  # noqa: E501
diff --git a/samples/client/petstore/ruby-faraday/lib/petstore/api/fake_api.rb b/samples/client/petstore/ruby-faraday/lib/petstore/api/fake_api.rb
index 3117e4bca52..8d5e5b6ab9a 100644
--- a/samples/client/petstore/ruby-faraday/lib/petstore/api/fake_api.rb
+++ b/samples/client/petstore/ruby-faraday/lib/petstore/api/fake_api.rb
@@ -1104,7 +1104,7 @@ module Petstore
       query_params = opts[:query_params] || {}
       query_params[:'pipe'] = @api_client.build_collection_param(pipe, :multi)
       query_params[:'ioutil'] = @api_client.build_collection_param(ioutil, :csv)
-      query_params[:'http'] = @api_client.build_collection_param(http, :space)
+      query_params[:'http'] = @api_client.build_collection_param(http, :ssv)
       query_params[:'url'] = @api_client.build_collection_param(url, :csv)
       query_params[:'context'] = @api_client.build_collection_param(context, :multi)
 
diff --git a/samples/client/petstore/ruby/lib/petstore/api/fake_api.rb b/samples/client/petstore/ruby/lib/petstore/api/fake_api.rb
index 3117e4bca52..8d5e5b6ab9a 100644
--- a/samples/client/petstore/ruby/lib/petstore/api/fake_api.rb
+++ b/samples/client/petstore/ruby/lib/petstore/api/fake_api.rb
@@ -1104,7 +1104,7 @@ module Petstore
       query_params = opts[:query_params] || {}
       query_params[:'pipe'] = @api_client.build_collection_param(pipe, :multi)
       query_params[:'ioutil'] = @api_client.build_collection_param(ioutil, :csv)
-      query_params[:'http'] = @api_client.build_collection_param(http, :space)
+      query_params[:'http'] = @api_client.build_collection_param(http, :ssv)
       query_params[:'url'] = @api_client.build_collection_param(url, :csv)
       query_params[:'context'] = @api_client.build_collection_param(context, :multi)
 
diff --git a/samples/openapi3/client/petstore/go-experimental/go-petstore/api_fake.go b/samples/openapi3/client/petstore/go-experimental/go-petstore/api_fake.go
index 25f70dafb54..de1429aecf2 100644
--- a/samples/openapi3/client/petstore/go-experimental/go-petstore/api_fake.go
+++ b/samples/openapi3/client/petstore/go-experimental/go-petstore/api_fake.go
@@ -1725,7 +1725,7 @@ func (r apiTestQueryParameterCollectionFormatRequest) Execute() (*_nethttp.Respo
 		}
 	}
 	localVarQueryParams.Add("ioutil", parameterToString(*r.ioutil, "csv"))
-	localVarQueryParams.Add("http", parameterToString(*r.http, "space"))
+	localVarQueryParams.Add("http", parameterToString(*r.http, "ssv"))
 	localVarQueryParams.Add("url", parameterToString(*r.url, "csv"))
 	{
 		t := *r.context
diff --git a/samples/openapi3/client/petstore/go/go-petstore/api_fake.go b/samples/openapi3/client/petstore/go/go-petstore/api_fake.go
index 8c5521b6430..393bb97ff3e 100644
--- a/samples/openapi3/client/petstore/go/go-petstore/api_fake.go
+++ b/samples/openapi3/client/petstore/go/go-petstore/api_fake.go
@@ -1275,7 +1275,7 @@ func (a *FakeApiService) TestQueryParameterCollectionFormat(ctx _context.Context
 		}
 	}
 	localVarQueryParams.Add("ioutil", parameterToString(ioutil, "csv"))
-	localVarQueryParams.Add("http", parameterToString(http, "space"))
+	localVarQueryParams.Add("http", parameterToString(http, "ssv"))
 	localVarQueryParams.Add("url", parameterToString(url, "csv"))
 	{
 		t:=context
diff --git a/samples/openapi3/client/petstore/python-experimental/petstore_api/api/fake_api.py b/samples/openapi3/client/petstore/python-experimental/petstore_api/api/fake_api.py
index 687d23eecc4..6580f2f2c52 100644
--- a/samples/openapi3/client/petstore/python-experimental/petstore_api/api/fake_api.py
+++ b/samples/openapi3/client/petstore/python-experimental/petstore_api/api/fake_api.py
@@ -2077,7 +2077,7 @@ class FakeApi(object):
                 'collection_format_map': {
                     'pipe': 'multi',
                     'ioutil': 'csv',
-                    'http': 'space',
+                    'http': 'ssv',
                     'url': 'csv',
                     'context': 'multi',
                 }
diff --git a/samples/openapi3/client/petstore/python/petstore_api/api/fake_api.py b/samples/openapi3/client/petstore/python/petstore_api/api/fake_api.py
index 49c9033aca2..6fe97f5b5ce 100644
--- a/samples/openapi3/client/petstore/python/petstore_api/api/fake_api.py
+++ b/samples/openapi3/client/petstore/python/petstore_api/api/fake_api.py
@@ -2160,7 +2160,7 @@ class FakeApi(object):
             collection_formats['ioutil'] = 'csv'  # noqa: E501
         if 'http' in local_var_params and local_var_params['http'] is not None:  # noqa: E501
             query_params.append(('http', local_var_params['http']))  # noqa: E501
-            collection_formats['http'] = 'space'  # noqa: E501
+            collection_formats['http'] = 'ssv'  # noqa: E501
         if 'url' in local_var_params and local_var_params['url'] is not None:  # noqa: E501
             query_params.append(('url', local_var_params['url']))  # noqa: E501
             collection_formats['url'] = 'csv'  # noqa: E501
diff --git a/samples/server/petstore/java-play-framework-fake-endpoints/app/controllers/FakeApiController.java b/samples/server/petstore/java-play-framework-fake-endpoints/app/controllers/FakeApiController.java
index 59733b8c58b..83d5368ae0e 100644
--- a/samples/server/petstore/java-play-framework-fake-endpoints/app/controllers/FakeApiController.java
+++ b/samples/server/petstore/java-play-framework-fake-endpoints/app/controllers/FakeApiController.java
@@ -476,7 +476,7 @@ public class FakeApiController extends Controller {
         if (httpArray == null) {
             throw new IllegalArgumentException("'http' parameter is required");
         }
-        List<String> httpList = OpenAPIUtils.parametersToList("space", httpArray);
+        List<String> httpList = OpenAPIUtils.parametersToList("ssv", httpArray);
         List<String> http = new ArrayList<>();
         for (String curParam : httpList) {
             if (!curParam.isEmpty()) {