diff --git a/output/openapi/elasticsearch-openapi.json b/output/openapi/elasticsearch-openapi.json
index 6fd54d2d9e..2b5d80da59 100644
--- a/output/openapi/elasticsearch-openapi.json
+++ b/output/openapi/elasticsearch-openapi.json
@@ -105035,6 +105035,11 @@
                 "description": "If `false`, the processor does not append values already present in the field.",
                 "default": true,
                 "type": "boolean"
+              },
+              "ignore_empty_values": {
+                "description": "If `true`, the processor will skip empty values from the source (e.g. empty strings, and null values),\nrather than appending them to the field.",
+                "default": false,
+                "type": "boolean"
               }
             },
             "required": [
diff --git a/output/openapi/elasticsearch-serverless-openapi.json b/output/openapi/elasticsearch-serverless-openapi.json
index b9f4361cb5..b9e1b887e3 100644
--- a/output/openapi/elasticsearch-serverless-openapi.json
+++ b/output/openapi/elasticsearch-serverless-openapi.json
@@ -69018,6 +69018,11 @@
                 "description": "If `false`, the processor does not append values already present in the field.",
                 "default": true,
                 "type": "boolean"
+              },
+              "ignore_empty_values": {
+                "description": "If `true`, the processor will skip empty values from the source (e.g. empty strings, and null values),\nrather than appending them to the field.",
+                "default": false,
+                "type": "boolean"
               }
             },
             "required": [
diff --git a/output/schema/schema.json b/output/schema/schema.json
index 572e57bd52..641399c937 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -183923,9 +183923,22 @@
               "namespace": "_builtins"
             }
           }
+        },
+        {
+          "description": "If `true`, the processor will skip empty values from the source (e.g. empty strings, and null values),\nrather than appending them to the field.",
+          "name": "ignore_empty_values",
+          "required": false,
+          "serverDefault": false,
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "boolean",
+              "namespace": "_builtins"
+            }
+          }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L329-L355"
+      "specLocation": "ingest/_types/Processors.ts#L329-L361"
     },
     {
       "kind": "interface",
@@ -184045,7 +184058,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L357-L398"
+      "specLocation": "ingest/_types/Processors.ts#L363-L404"
     },
     {
       "kind": "interface",
@@ -184099,7 +184112,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L567-L583"
+      "specLocation": "ingest/_types/Processors.ts#L573-L589"
     },
     {
       "kind": "interface",
@@ -184176,7 +184189,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L585-L608"
+      "specLocation": "ingest/_types/Processors.ts#L591-L614"
     },
     {
       "kind": "interface",
@@ -184335,7 +184348,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L610-L671"
+      "specLocation": "ingest/_types/Processors.ts#L616-L677"
     },
     {
       "kind": "interface",
@@ -184401,7 +184414,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L684-L704"
+      "specLocation": "ingest/_types/Processors.ts#L690-L710"
     },
     {
       "kind": "enum",
@@ -184435,7 +184448,7 @@
         "name": "ConvertType",
         "namespace": "ingest._types"
       },
-      "specLocation": "ingest/_types/Processors.ts#L673-L682"
+      "specLocation": "ingest/_types/Processors.ts#L679-L688"
     },
     {
       "kind": "interface",
@@ -184533,7 +184546,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L706-L739"
+      "specLocation": "ingest/_types/Processors.ts#L712-L745"
     },
     {
       "kind": "interface",
@@ -184758,7 +184771,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L741-L779"
+      "specLocation": "ingest/_types/Processors.ts#L747-L785"
     },
     {
       "kind": "interface",
@@ -184853,7 +184866,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L781-L814"
+      "specLocation": "ingest/_types/Processors.ts#L787-L820"
     },
     {
       "kind": "interface",
@@ -184919,7 +184932,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L816-L835"
+      "specLocation": "ingest/_types/Processors.ts#L822-L841"
     },
     {
       "kind": "interface",
@@ -185154,7 +185167,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L837-L855"
+      "specLocation": "ingest/_types/Processors.ts#L843-L861"
     },
     {
       "kind": "interface",
@@ -185169,7 +185182,7 @@
         "namespace": "ingest._types"
       },
       "properties": [],
-      "specLocation": "ingest/_types/Processors.ts#L857-L857"
+      "specLocation": "ingest/_types/Processors.ts#L863-L863"
     },
     {
       "kind": "interface",
@@ -185273,7 +185286,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L859-L898"
+      "specLocation": "ingest/_types/Processors.ts#L865-L904"
     },
     {
       "kind": "interface",
@@ -185301,7 +185314,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L900-L906"
+      "specLocation": "ingest/_types/Processors.ts#L906-L912"
     },
     {
       "kind": "enum",
@@ -185347,7 +185360,7 @@
         "name": "FingerprintDigest",
         "namespace": "ingest._types"
       },
-      "specLocation": "ingest/_types/Processors.ts#L908-L914"
+      "specLocation": "ingest/_types/Processors.ts#L914-L920"
     },
     {
       "kind": "interface",
@@ -185426,7 +185439,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L916-L944"
+      "specLocation": "ingest/_types/Processors.ts#L922-L950"
     },
     {
       "kind": "interface",
@@ -185479,7 +185492,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L946-L960"
+      "specLocation": "ingest/_types/Processors.ts#L952-L966"
     },
     {
       "kind": "interface",
@@ -185606,7 +185619,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L400-L441"
+      "specLocation": "ingest/_types/Processors.ts#L406-L447"
     },
     {
       "kind": "enum",
@@ -185622,7 +185635,7 @@
         "name": "GeoGridTargetFormat",
         "namespace": "ingest._types"
       },
-      "specLocation": "ingest/_types/Processors.ts#L449-L452"
+      "specLocation": "ingest/_types/Processors.ts#L455-L458"
     },
     {
       "kind": "enum",
@@ -185641,7 +185654,7 @@
         "name": "GeoGridTileType",
         "namespace": "ingest._types"
       },
-      "specLocation": "ingest/_types/Processors.ts#L443-L447"
+      "specLocation": "ingest/_types/Processors.ts#L449-L453"
     },
     {
       "kind": "interface",
@@ -185748,7 +185761,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L454-L488"
+      "specLocation": "ingest/_types/Processors.ts#L460-L494"
     },
     {
       "kind": "interface",
@@ -185853,7 +185866,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L962-L993"
+      "specLocation": "ingest/_types/Processors.ts#L968-L999"
     },
     {
       "kind": "interface",
@@ -185931,7 +185944,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L995-L1019"
+      "specLocation": "ingest/_types/Processors.ts#L1001-L1025"
     },
     {
       "kind": "interface",
@@ -185985,7 +185998,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1021-L1037"
+      "specLocation": "ingest/_types/Processors.ts#L1027-L1043"
     },
     {
       "kind": "interface",
@@ -186019,7 +186032,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1078-L1090",
+      "specLocation": "ingest/_types/Processors.ts#L1084-L1096",
       "variants": {
         "kind": "container"
       }
@@ -186096,7 +186109,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1105-L1131"
+      "specLocation": "ingest/_types/Processors.ts#L1111-L1137"
     },
     {
       "kind": "interface",
@@ -186132,7 +186145,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1092-L1103"
+      "specLocation": "ingest/_types/Processors.ts#L1098-L1109"
     },
     {
       "kind": "interface",
@@ -186243,7 +186256,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1039-L1071"
+      "specLocation": "ingest/_types/Processors.ts#L1045-L1077"
     },
     {
       "kind": "interface",
@@ -186324,7 +186337,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1073-L1076"
+      "specLocation": "ingest/_types/Processors.ts#L1079-L1082"
     },
     {
       "kind": "interface",
@@ -186431,7 +186444,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L490-L524"
+      "specLocation": "ingest/_types/Processors.ts#L496-L530"
     },
     {
       "kind": "interface",
@@ -186493,7 +186506,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1133-L1148"
+      "specLocation": "ingest/_types/Processors.ts#L1139-L1154"
     },
     {
       "kind": "interface",
@@ -186572,7 +186585,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1150-L1179"
+      "specLocation": "ingest/_types/Processors.ts#L1156-L1185"
     },
     {
       "kind": "enum",
@@ -186590,7 +186603,7 @@
         "name": "JsonProcessorConflictStrategy",
         "namespace": "ingest._types"
       },
-      "specLocation": "ingest/_types/Processors.ts#L1181-L1186"
+      "specLocation": "ingest/_types/Processors.ts#L1187-L1192"
     },
     {
       "kind": "interface",
@@ -186747,7 +186760,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1188-L1240"
+      "specLocation": "ingest/_types/Processors.ts#L1194-L1246"
     },
     {
       "kind": "interface",
@@ -186822,7 +186835,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1242-L1258"
+      "specLocation": "ingest/_types/Processors.ts#L1248-L1264"
     },
     {
       "kind": "interface",
@@ -186938,7 +186951,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1260-L1294"
+      "specLocation": "ingest/_types/Processors.ts#L1266-L1300"
     },
     {
       "kind": "interface",
@@ -187226,7 +187239,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1296-L1307"
+      "specLocation": "ingest/_types/Processors.ts#L1302-L1313"
     },
     {
       "kind": "interface",
@@ -188209,7 +188222,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1309-L1350"
+      "specLocation": "ingest/_types/Processors.ts#L1315-L1356"
     },
     {
       "kind": "interface",
@@ -188262,7 +188275,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1352-L1368"
+      "specLocation": "ingest/_types/Processors.ts#L1358-L1374"
     },
     {
       "kind": "interface",
@@ -188315,7 +188328,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1370-L1384"
+      "specLocation": "ingest/_types/Processors.ts#L1376-L1390"
     },
     {
       "kind": "interface",
@@ -188368,7 +188381,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1386-L1402"
+      "specLocation": "ingest/_types/Processors.ts#L1392-L1408"
     },
     {
       "kind": "interface",
@@ -188450,7 +188463,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1404-L1432"
+      "specLocation": "ingest/_types/Processors.ts#L1410-L1438"
     },
     {
       "kind": "interface",
@@ -188522,7 +188535,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1434-L1454"
+      "specLocation": "ingest/_types/Processors.ts#L1440-L1460"
     },
     {
       "kind": "interface",
@@ -188609,7 +188622,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1456-L1491"
+      "specLocation": "ingest/_types/Processors.ts#L1462-L1497"
     },
     {
       "kind": "interface",
@@ -188652,7 +188665,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1493-L1502"
+      "specLocation": "ingest/_types/Processors.ts#L1499-L1508"
     },
     {
       "kind": "enum",
@@ -188668,7 +188681,7 @@
         "name": "ShapeType",
         "namespace": "ingest._types"
       },
-      "specLocation": "ingest/_types/Processors.ts#L1504-L1507"
+      "specLocation": "ingest/_types/Processors.ts#L1510-L1513"
     },
     {
       "kind": "interface",
@@ -188767,7 +188780,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1509-L1525"
+      "specLocation": "ingest/_types/Processors.ts#L1515-L1531"
     },
     {
       "kind": "interface",
@@ -188846,7 +188859,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1527-L1552"
+      "specLocation": "ingest/_types/Processors.ts#L1533-L1558"
     },
     {
       "kind": "interface",
@@ -188861,7 +188874,7 @@
         "namespace": "ingest._types"
       },
       "properties": [],
-      "specLocation": "ingest/_types/Processors.ts#L1554-L1554"
+      "specLocation": "ingest/_types/Processors.ts#L1560-L1560"
     },
     {
       "kind": "interface",
@@ -188915,7 +188928,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1556-L1572"
+      "specLocation": "ingest/_types/Processors.ts#L1562-L1578"
     },
     {
       "kind": "interface",
@@ -188969,7 +188982,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1574-L1590"
+      "specLocation": "ingest/_types/Processors.ts#L1580-L1596"
     },
     {
       "kind": "interface",
@@ -189049,7 +189062,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1610-L1636"
+      "specLocation": "ingest/_types/Processors.ts#L1616-L1642"
     },
     {
       "kind": "interface",
@@ -189103,7 +189116,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L1592-L1608"
+      "specLocation": "ingest/_types/Processors.ts#L1598-L1614"
     },
     {
       "kind": "interface",
@@ -189211,7 +189224,7 @@
           }
         }
       ],
-      "specLocation": "ingest/_types/Processors.ts#L526-L557"
+      "specLocation": "ingest/_types/Processors.ts#L532-L563"
     },
     {
       "kind": "enum",
@@ -189236,7 +189249,7 @@
         "name": "UserAgentProperty",
         "namespace": "ingest._types"
       },
-      "specLocation": "ingest/_types/Processors.ts#L559-L565"
+      "specLocation": "ingest/_types/Processors.ts#L565-L571"
     },
     {
       "kind": "interface",
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index d177bd0e4a..063ea3dcfe 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -15196,6 +15196,7 @@ export interface IngestAppendProcessor extends IngestProcessorBase {
   media_type?: string
   copy_from?: Field
   allow_duplicates?: boolean
+  ignore_empty_values?: boolean
 }
 
 export interface IngestAttachmentProcessor extends IngestProcessorBase {
diff --git a/specification/ingest/_types/Processors.ts b/specification/ingest/_types/Processors.ts
index 9da4669e8c..42eb5cd331 100644
--- a/specification/ingest/_types/Processors.ts
+++ b/specification/ingest/_types/Processors.ts
@@ -352,6 +352,12 @@ export class AppendProcessor extends ProcessorBase {
    * @server_default true
    */
   allow_duplicates?: boolean
+  /**
+   * If `true`, the processor will skip empty values from the source (e.g. empty strings, and null values),
+   * rather than appending them to the field.
+   * @server_default false
+   */
+  ignore_empty_values?: boolean
 }
 
 export class AttachmentProcessor extends ProcessorBase {