diff --git a/db/datatypes.go b/db/datatypes.go
index 939d8cf4..21e2adfe 100644
--- a/db/datatypes.go
+++ b/db/datatypes.go
@@ -15,6 +15,7 @@ func (h *Host) indexDataTypeModels(cxt context.Context, parent *sectionInfo, clu
 	h.indexBitmaps(cluster, parent)
 	h.indexEnums(cluster, parent)
 	h.indexStructs(cluster, parent)
+	h.indexTypeDefs(cluster, parent)
 	return nil
 }
 
@@ -55,6 +56,16 @@ func (h *Host) indexEnums(cluster *matter.Cluster, parent *sectionInfo) {
 		}
 	}
 }
+func (h *Host) indexTypeDefs(cluster *matter.Cluster, parent *sectionInfo) {
+	for _, t := range cluster.TypeDefs {
+		row := newDBRow()
+		row.values[matter.TableColumnName] = t.Name
+		row.values[matter.TableColumnType] = t.Type.Name
+		row.values[matter.TableColumnDescription] = t.Description
+		ei := &sectionInfo{id: h.nextID(typedefTable), parent: parent, values: row, children: make(map[string][]*sectionInfo)}
+		parent.children[typedefTable] = append(parent.children[typedefTable], ei)
+	}
+}
 
 func (h *Host) readField(f *matter.Field, parent *sectionInfo, tableName string, entityType types.EntityType) {
 	sr := newDBRow()
@@ -93,7 +104,7 @@ func (h *Host) indexDataTypes(cxt context.Context, doc *spec.Doc, ds *sectionInf
 	}
 	for _, s := range parse.Skim[*spec.Section](dts.Elements()) {
 		switch s.SecType {
-		case matter.SectionDataTypeBitmap, matter.SectionDataTypeEnum, matter.SectionDataTypeStruct:
+		case matter.SectionDataTypeBitmap, matter.SectionDataTypeEnum, matter.SectionDataTypeStruct, matter.SectionDataTypeDef:
 			var t string
 			switch s.SecType {
 			case matter.SectionDataTypeBitmap:
@@ -102,6 +113,8 @@ func (h *Host) indexDataTypes(cxt context.Context, doc *spec.Doc, ds *sectionInf
 				t = "enum"
 			case matter.SectionDataTypeStruct:
 				t = "struct"
+			case matter.SectionDataTypeDef:
+				t = "typedef"
 			}
 			name := text.TrimCaseInsensitiveSuffix(s.Name, " Type")
 			name = matter.StripDataTypeSuffixes(name)
@@ -128,6 +141,9 @@ func (h *Host) indexDataTypes(cxt context.Context, doc *spec.Doc, ds *sectionInf
 				ci.id = h.nextID(structTable)
 				err = h.readTableSection(cxt, doc, ci, s, structField)
 				ds.children[structTable] = append(ds.children[structTable], ci)
+			case matter.SectionDataTypeDef:
+				ci.id = h.nextID(typedefTable)
+				ds.children[typedefTable] = append(ds.children[typedefTable], ci)
 			}
 			if err != nil {
 				return
diff --git a/db/schema.go b/db/schema.go
index 22ef2bdd..d9b20a51 100644
--- a/db/schema.go
+++ b/db/schema.go
@@ -22,6 +22,7 @@ var (
 	deviceTypeRevisionTable           = "device_type_revision"
 	deviceTypeConditionTable          = "device_type_condition"
 	deviceTypeClusterRequirementTable = "device_type_cluster_requirement"
+	typedefTable                      = "typedef"
 )
 
 type tableSchemaDef struct {
@@ -115,6 +116,14 @@ var tableSchema = map[string]tableSchemaDef{
 			matter.TableColumnConformance,
 		},
 	},
+	typedefTable: {
+		parent: clusterTable,
+		columns: []matter.TableColumn{
+			matter.TableColumnName,
+			matter.TableColumnDescription,
+			matter.TableColumnType,
+		},
+	},
 	attributeTable: {
 		parent: clusterTable,
 		columns: []matter.TableColumn{
diff --git a/errata/spec.go b/errata/spec.go
index c97d7a94..cb993d90 100644
--- a/errata/spec.go
+++ b/errata/spec.go
@@ -37,9 +37,10 @@ const (
 	SpecPurposeCluster                      = 1 << (iota - 1)
 	SpecPurposeDeviceType                   = 1 << (iota - 1)
 	SpecPurposeCommandArguments             = 1 << (iota - 1)
+	SpecPurposeDataTypesDef                 = 1 << (iota - 1)
 
-	SpecPurposeDataTypes SpecPurpose = SpecPurposeDataTypesBitmap | SpecPurposeDataTypesEnum | SpecPurposeDataTypesStruct
-	SpecPurposeAll       SpecPurpose = SpecPurposeDataTypesBitmap | SpecPurposeDataTypesEnum | SpecPurposeDataTypesStruct | SpecPurposeCluster | SpecPurposeDeviceType | SpecPurposeCommandArguments
+	SpecPurposeDataTypes SpecPurpose = SpecPurposeDataTypesBitmap | SpecPurposeDataTypesEnum | SpecPurposeDataTypesStruct | SpecPurposeDataTypesDef
+	SpecPurposeAll       SpecPurpose = SpecPurposeDataTypes | SpecPurposeCluster | SpecPurposeDeviceType | SpecPurposeCommandArguments
 )
 
 var specPurposes = map[string]SpecPurpose{
diff --git a/matter/cluster.go b/matter/cluster.go
index 9e67739a..318b6e3b 100644
--- a/matter/cluster.go
+++ b/matter/cluster.go
@@ -87,6 +87,7 @@ type Cluster struct {
 
 	Features *Features `json:"features,omitempty"`
 	AssociatedDataTypes
+	TypeDefs   TypeDefSet `json:"typedefs,omitempty"`
 	Attributes FieldSet   `json:"attributes,omitempty"`
 	Events     EventSet   `json:"events,omitempty"`
 	Commands   CommandSet `json:"commands,omitempty"`
diff --git a/matter/sections.go b/matter/sections.go
index e85a9afd..60cbe713 100644
--- a/matter/sections.go
+++ b/matter/sections.go
@@ -39,6 +39,7 @@ const (
 	SectionDerivedClusterNamespace
 	SectionModeTags
 	SectionGlobalElements
+	SectionDataTypeDef
 )
 
 var TopLevelSectionOrders = map[DocType][]Section{
@@ -67,7 +68,7 @@ var TopLevelSectionOrders = map[DocType][]Section{
 	},
 }
 
-var DataTypeSectionOrder = []Section{SectionPrefix, SectionDataTypeBitmap, SectionDataTypeEnum, SectionDataTypeStruct}
+var DataTypeSectionOrder = []Section{SectionPrefix, SectionDataTypeBitmap, SectionDataTypeEnum, SectionDataTypeStruct, SectionDataTypeDef}
 
 var sectionTypeStrings = map[Section]string{
 	SectionPrefix:                         "Prefix",
@@ -85,6 +86,7 @@ var sectionTypeStrings = map[Section]string{
 	SectionDataTypeBitmap:                 "Bitmap",
 	SectionDataTypeEnum:                   "Enum",
 	SectionDataTypeStruct:                 "Struct",
+	SectionDataTypeDef:                    "TypeDef",
 	SectionDeviceType:                     "DeviceType",
 	SectionStatusCodes:                    "StatusCodes",
 	SectionAttributes:                     "Attributes",
@@ -130,6 +132,7 @@ var sectionTypeNames = map[Section]string{
 	SectionDataTypeBitmap:                 "Bitmap",
 	SectionDataTypeEnum:                   "Enum",
 	SectionDataTypeStruct:                 "Struct",
+	SectionDataTypeDef:                    "Type Definition",
 	SectionDeviceType:                     "Device Type",
 	SectionStatusCodes:                    "Status Codes",
 	SectionAttributes:                     "Attributes",
diff --git a/matter/spec/build.go b/matter/spec/build.go
index 8ca0b3a6..02a40504 100644
--- a/matter/spec/build.go
+++ b/matter/spec/build.go
@@ -231,6 +231,16 @@ func addClusterToSpec(spec *Specification, d *Doc, m *matter.Cluster) {
 		spec.DocRefs[en] = d
 		spec.addEntityByName(en.Name, en, m)
 	}
+	for _, en := range m.TypeDefs {
+		_, ok := spec.typeDefIndex[en.Name]
+		if ok {
+			slog.Debug("multiple structs with same name", "name", en.Name)
+		} else {
+			spec.typeDefIndex[en.Name] = en
+		}
+		spec.DocRefs[en] = d
+		spec.addEntityByName(en.Name, en, m)
+	}
 }
 
 func (sp *Builder) resolveDataTypeReferences(spec *Specification) {
diff --git a/matter/spec/cluster.go b/matter/spec/cluster.go
index a8647006..f5cb9d89 100644
--- a/matter/spec/cluster.go
+++ b/matter/spec/cluster.go
@@ -40,17 +40,20 @@ func (s *Section) toClusters(d *Doc, entityMap map[asciidoc.Attributable][]types
 	var bitmaps matter.BitmapSet
 	var enums matter.EnumSet
 	var structs matter.StructSet
+	var typedefs matter.TypeDefSet
 	for _, s := range elements {
 		switch s.SecType {
 		case matter.SectionDataTypes, matter.SectionStatusCodes:
 			var bs matter.BitmapSet
 			var es matter.EnumSet
 			var ss matter.StructSet
-			bs, es, ss, err = s.toDataTypes(d, entityMap)
+			var ts matter.TypeDefSet
+			bs, es, ss, ts, err = s.toDataTypes(d, entityMap)
 			if err == nil {
 				bitmaps = append(bitmaps, bs...)
 				enums = append(enums, es...)
 				structs = append(structs, ss...)
+				typedefs = append(typedefs, ts...)
 			}
 		case matter.SectionFeatures:
 			features, err = s.toFeatures(d, entityMap)
@@ -90,6 +93,7 @@ func (s *Section) toClusters(d *Doc, entityMap map[asciidoc.Attributable][]types
 		c.AddBitmaps(bitmaps...)
 		c.AddEnums(enums...)
 		c.AddStructs(structs...)
+		c.TypeDefs = append(c.TypeDefs, typedefs...)
 		c.Features = features
 
 		for _, s := range elements {
@@ -137,6 +141,8 @@ func (s *Section) toClusters(d *Doc, entityMap map[asciidoc.Attributable][]types
 							c.AddEnums(le)
 						case *matter.Struct:
 							c.AddStructs(le)
+						case *matter.TypeDef:
+							c.TypeDefs = append(c.TypeDefs, le)
 						default:
 							slog.Warn("unexpected loose entity", log.Element("path", d.Path, s.Base), "entity", le)
 						}
@@ -206,6 +212,12 @@ func assignCustomDataType(c *matter.Cluster, dt *types.DataType) {
 			return
 		}
 	}
+	for _, t := range c.TypeDefs {
+		if name == t.Name {
+			dt.Entity = t
+			return
+		}
+	}
 	slog.Debug("unable to find data type for field", slog.String("dataType", name), log.Type("source", dt.Source))
 }
 
diff --git a/matter/spec/datatypes.go b/matter/spec/datatypes.go
index 826288d5..c93aefce 100644
--- a/matter/spec/datatypes.go
+++ b/matter/spec/datatypes.go
@@ -16,7 +16,7 @@ import (
 	"github.com/project-chip/alchemy/matter/types"
 )
 
-func (s *Section) toDataTypes(d *Doc, entityMap map[asciidoc.Attributable][]types.Entity) (bitmaps matter.BitmapSet, enums matter.EnumSet, structs matter.StructSet, err error) {
+func (s *Section) toDataTypes(d *Doc, entityMap map[asciidoc.Attributable][]types.Entity) (bitmaps matter.BitmapSet, enums matter.EnumSet, structs matter.StructSet, typedefs matter.TypeDefSet, err error) {
 
 	traverse(d, s, errata.SpecPurposeDataTypes, func(s *Section, parent parse.HasElements, index int) parse.SearchShould {
 		switch s.SecType {
@@ -47,6 +47,16 @@ func (s *Section) toDataTypes(d *Doc, entityMap map[asciidoc.Attributable][]type
 			} else {
 				structs = append(structs, me)
 			}
+		case matter.SectionDataTypeDef:
+			var me *matter.TypeDef
+			me, err = s.toTypeDef(d, entityMap)
+			if err != nil {
+				slog.Warn("Error converting section to typedef", log.Element("path", d.Path, s.Base), slog.Any("error", err))
+				err = nil
+			} else {
+				typedefs = append(typedefs, me)
+				entityMap[s.Base] = append(entityMap[s.Base], me)
+			}
 		default:
 		}
 		return parse.SearchShouldContinue
@@ -140,7 +150,7 @@ func (d *Doc) readFields(ti *TableInfo, entityType types.EntityType) (fields []*
 	return
 }
 
-var listDataTypeDefinitionPattern = regexp.MustCompile(`(?:list|List|DataTypeList)\[([^\]]+)\]`)
+var listDataTypeDefinitionPattern = regexp.MustCompile(`(?:list|List|DataTypeList)\[([^]]+)]`)
 var asteriskPattern = regexp.MustCompile(`\^[0-9]+\^\s*$`)
 
 func (d *Doc) ReadRowDataType(row *asciidoc.TableRow, columnMap ColumnIndex, column matter.TableColumn) (*types.DataType, error) {
diff --git a/matter/spec/global.go b/matter/spec/global.go
index d322c056..6c4133ff 100644
--- a/matter/spec/global.go
+++ b/matter/spec/global.go
@@ -45,6 +45,15 @@ func addGlobalEntities(spec *Specification, doc *Doc) error {
 				spec.structIndex[m.Name] = m
 			}
 			spec.addEntityByName(m.Name, m, nil)
+		case *matter.TypeDef:
+			slog.Debug("Found global typedef", "name", m.Name, "path", doc.Path)
+			_, ok := spec.typeDefIndex[m.Name]
+			if ok {
+				slog.Warn("multiple global typedefs with same name", "name", m.Name)
+			} else {
+				spec.typeDefIndex[m.Name] = m
+			}
+			spec.addEntityByName(m.Name, m, nil)
 		case *matter.Command:
 			_, ok := spec.commandIndex[m.Name]
 			if ok {
diff --git a/matter/spec/section.go b/matter/spec/section.go
index 967fae3c..1805e603 100644
--- a/matter/spec/section.go
+++ b/matter/spec/section.go
@@ -156,7 +156,7 @@ func AssignSectionTypes(doc *Doc, top *Section) error {
 
 		assignSectionType(doc, section, getSectionType(ps, section))
 		switch section.SecType {
-		case matter.SectionDataTypeBitmap, matter.SectionDataTypeEnum, matter.SectionDataTypeStruct:
+		case matter.SectionDataTypeBitmap, matter.SectionDataTypeEnum, matter.SectionDataTypeStruct, matter.SectionDataTypeDef:
 			if section.Base.Level > 2 {
 				slog.Debug("Unusual depth for section type", slog.String("name", section.Name), slog.String("type", section.SecType.String()), slog.String("path", doc.Path.String()))
 			}
@@ -177,6 +177,8 @@ func assignSectionType(doc *Doc, s *Section, sectionType matter.Section) {
 		ignore = doc.errata.Spec.IgnoreSection(s.Name, errata.SpecPurposeDataTypesEnum)
 	case matter.SectionDataTypeStruct:
 		ignore = doc.errata.Spec.IgnoreSection(s.Name, errata.SpecPurposeDataTypesStruct)
+	case matter.SectionDataTypeDef:
+		ignore = doc.errata.Spec.IgnoreSection(s.Name, errata.SpecPurposeDataTypesDef)
 	case matter.SectionCluster:
 		ignore = doc.errata.Spec.IgnoreSection(s.Name, errata.SpecPurposeCluster)
 	case matter.SectionDeviceType:
@@ -360,6 +362,8 @@ func deriveSectionType(section *Section, parent *Section) matter.Section {
 			return matter.SectionDataTypeBitmap
 		} else if dataType.BaseType == types.BaseDataTypeCustom {
 			return matter.SectionDataTypeStruct
+		} else if dataType.BaseType.IsSimple() {
+			return matter.SectionDataTypeDef
 		}
 	}
 	slog.Debug("unknown section type", "path", section.Doc.Path, "name", name)
@@ -453,7 +457,7 @@ func (s *Section) toGlobalObjects(d *Doc, entityMap map[asciidoc.Attributable][]
 	return entities, nil
 }
 
-var dataTypeDefinitionPattern = regexp.MustCompile(`is\s+derived\s+from\s+(?:<<enum-def\s*,\s*)?(enum8|enum16|enum32|map8|map16|map32)(?:\s*>>)?`)
+var dataTypeDefinitionPattern = regexp.MustCompile(`is\s+derived\s+from\s+(?:<<enum-def\s*,\s*)?(enum8|enum16|enum32|map8|map16|map32|uint8|uint16|uint24|uint32|uint40|uint48|uint56|uint64|int8|int16|int24|int32|int40|int48|int56|int64|string)(?:\s*>>)?`)
 
 func (s *Section) GetDataType() *types.DataType {
 	var dts string
@@ -527,6 +531,15 @@ func findLooseEntities(doc *Doc, section *Section, entityMap map[asciidoc.Attrib
 			} else {
 				entities = append(entities, s)
 			}
+		case matter.SectionDataTypeDef:
+			var t *matter.TypeDef
+			t, err = section.toTypeDef(doc, entityMap)
+			if err != nil {
+				slog.Warn("Error converting loose section to typedef", log.Element("path", doc.Path, section.Base), slog.Any("error", err))
+				err = nil
+			} else {
+				entities = append(entities, t)
+			}
 		case matter.SectionGlobalElements:
 			var ges []types.Entity
 			ges, err = section.toGlobalElements(doc, entityMap)
diff --git a/matter/spec/spec.go b/matter/spec/spec.go
index c020c20c..c9982647 100644
--- a/matter/spec/spec.go
+++ b/matter/spec/spec.go
@@ -27,6 +27,7 @@ type Specification struct {
 	bitmapIndex  map[string]*matter.Bitmap
 	enumIndex    map[string]*matter.Enum
 	structIndex  map[string]*matter.Struct
+	typeDefIndex map[string]*matter.TypeDef
 	commandIndex map[string]*matter.Command
 	eventIndex   map[string]*matter.Event
 
@@ -48,6 +49,7 @@ func newSpec() *Specification {
 		bitmapIndex:  make(map[string]*matter.Bitmap),
 		enumIndex:    make(map[string]*matter.Enum),
 		structIndex:  make(map[string]*matter.Struct),
+		typeDefIndex: make(map[string]*matter.TypeDef),
 		commandIndex: make(map[string]*matter.Command),
 		eventIndex:   make(map[string]*matter.Event),
 
diff --git a/matter/spec/typedef.go b/matter/spec/typedef.go
new file mode 100644
index 00000000..01b2fbe6
--- /dev/null
+++ b/matter/spec/typedef.go
@@ -0,0 +1,25 @@
+package spec
+
+import (
+	"fmt"
+
+	"github.com/project-chip/alchemy/asciidoc"
+	"github.com/project-chip/alchemy/internal/text"
+	"github.com/project-chip/alchemy/matter"
+	"github.com/project-chip/alchemy/matter/types"
+)
+
+func (s *Section) toTypeDef(d *Doc, entityMap map[asciidoc.Attributable][]types.Entity) (ms *matter.TypeDef, err error) {
+	name := text.TrimCaseInsensitiveSuffix(s.Name, " Type")
+	ms = matter.NewTypeDef(s.Base)
+	ms.Name = name
+
+	dt := s.GetDataType()
+	if (dt == nil) || !dt.BaseType.IsSimple() {
+		return nil, fmt.Errorf("unknown typedef data type: %s", dt.Name)
+	}
+	ms.Type = dt
+	entityMap[s.Base] = append(entityMap[s.Base], ms)
+	ms.Name = CanonicalName(ms.Name)
+	return
+}
diff --git a/matter/typedef.go b/matter/typedef.go
new file mode 100644
index 00000000..961d7d75
--- /dev/null
+++ b/matter/typedef.go
@@ -0,0 +1,46 @@
+package matter
+
+import (
+	"github.com/project-chip/alchemy/asciidoc"
+	"github.com/project-chip/alchemy/matter/types"
+)
+
+type TypeDef struct {
+	entity
+	Name        string          `json:"name,omitempty"`
+	Description string          `json:"description,omitempty"`
+	Type        *types.DataType `json:"type,omitempty"`
+}
+
+func NewTypeDef(source asciidoc.Element) *TypeDef {
+	return &TypeDef{
+		entity: entity{source: source},
+	}
+}
+
+func (*TypeDef) EntityType() types.EntityType {
+	return types.EntityTypeDef
+}
+
+func (s *TypeDef) Clone() *TypeDef {
+	ns := &TypeDef{Name: s.Name, Description: s.Description, Type: s.Type}
+	return ns
+}
+
+func (s *TypeDef) Inherit(parent *TypeDef) {
+	if len(s.Description) == 0 {
+		s.Description = parent.Description
+	}
+	s.Type = s.Type
+}
+
+type TypeDefSet []*TypeDef
+
+func (ss TypeDefSet) Identifier(name string) (types.Entity, bool) {
+	for _, e := range ss {
+		if e.Name == name {
+			return e, true
+		}
+	}
+	return nil, false
+}
diff --git a/matter/types/base.go b/matter/types/base.go
index 8946c94b..b83bb912 100644
--- a/matter/types/base.go
+++ b/matter/types/base.go
@@ -89,7 +89,6 @@ const (
 	BaseDataTypeTag
 
 	BaseDataTypeMessageID
-	BaseDataTypeDeviceType
 )
 
 type HasBaseDataType interface {
@@ -121,6 +120,18 @@ func (bdt BaseDataType) String() string {
 	return BaseDataTypeName(bdt)
 }
 
+func (bdt BaseDataType) IsSimple() bool {
+	switch bdt {
+	case BaseDataTypeUInt8, BaseDataTypeUInt16, BaseDataTypeUInt24, BaseDataTypeUInt32,
+		BaseDataTypeUInt40, BaseDataTypeUInt48, BaseDataTypeUInt56, BaseDataTypeUInt64,
+		BaseDataTypeInt8, BaseDataTypeInt16, BaseDataTypeInt24, BaseDataTypeInt32,
+		BaseDataTypeInt40, BaseDataTypeInt48, BaseDataTypeInt56, BaseDataTypeInt64,
+		BaseDataTypeString:
+		return true
+	}
+	return false
+}
+
 func BaseDataTypeName(baseDataType BaseDataType) string {
 	switch baseDataType {
 	case BaseDataTypeUnknown:
diff --git a/matter/types/entity.go b/matter/types/entity.go
index 4af056f5..faf616dc 100644
--- a/matter/types/entity.go
+++ b/matter/types/entity.go
@@ -27,6 +27,7 @@ const (
 	EntityTypeCondition
 	EntityTypeStructField
 	EntityTypeElementRequirement
+	EntityTypeDef
 	EntityTypeNamespace
 )
 
@@ -58,6 +59,7 @@ var (
 		EntityTypeCondition:          "condition",
 		EntityTypeStructField:        "structField",
 		EntityTypeElementRequirement: "elementRequirement",
+		EntityTypeDef:                "typeDef",
 		EntityTypeNamespace:          "namespace",
 	}
 )
diff --git a/zap/datatype.go b/zap/datatype.go
index 882dd663..84b892b5 100644
--- a/zap/datatype.go
+++ b/zap/datatype.go
@@ -423,14 +423,6 @@ func ToBaseDataType(s string) types.BaseDataType {
 	}
 	return types.BaseDataTypeUnknown
 }
-
-func ConvertZapToDataTypeName(s string) string {
-	if z, ok := zapToMatterMap[strings.ToLower(s)]; ok {
-		return z
-	}
-	return s
-}
-
 func maxOver255Bytes(fs matter.FieldSet, f *matter.Field) bool {
 	if f.Constraint == nil {
 		return false
@@ -464,6 +456,10 @@ func FieldToZapDataType(fs matter.FieldSet, f *matter.Field) string {
 	if f.Type.IsArray() {
 		return DataTypeName(f.Type.EntryType)
 	}
+	if t, isTypeDef := f.Type.Entity.(*matter.TypeDef); isTypeDef {
+		return DataTypeName(t.Type)
+	}
+
 	return DataTypeName(f.Type)
 }
 
diff --git a/zap/generate/cluster.go b/zap/generate/cluster.go
index 628c5710..8e2c963b 100644
--- a/zap/generate/cluster.go
+++ b/zap/generate/cluster.go
@@ -123,8 +123,10 @@ func (tg *TemplateGenerator) populateCluster(configurator *zap.Configurator, cle
 		commands[c] = []*matter.Number{}
 	}
 
-	xml.SetOrCreateSimpleElement(cle, "domain", matter.DomainNames[configurator.Doc.Domain])
-	clusterName := cluster.Name
+	de := xml.SetOrCreateSimpleElement(cle, "domain", "")
+	de.CreateAttr("name", matter.DomainNames[configurator.Doc.Domain])
+	de.SetText("")
+  clusterName := cluster.Name
 	if errata.ClusterName != "" {
 		clusterName = errata.ClusterName
 	}
diff --git a/zap/generate/configurator.go b/zap/generate/configurator.go
index 46a40da1..a075c40c 100644
--- a/zap/generate/configurator.go
+++ b/zap/generate/configurator.go
@@ -48,6 +48,8 @@ func (tg *TemplateGenerator) renderZapTemplate(configurator *zap.Configurator, x
 	if ce == nil {
 		ce = x.CreateElement("configurator")
 	}
+	ce.CreateAttr("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance")
+	ce.CreateAttr("xsi:noNamespaceSchemaLocation", "../../zcl.xsd")
 
 	de := ce.SelectElement("domain")
 	if de == nil {