diff --git a/src/file/document/document.ts b/src/file/document/document.ts
index cc33709076..6fc78b8b1a 100644
--- a/src/file/document/document.ts
+++ b/src/file/document/document.ts
@@ -11,6 +11,25 @@ export interface IDocumentOptions {
     readonly background: IDocumentBackgroundOptions;
 }
 
+// <xsd:element name="document" type="CT_Document"/>
+//
+// <xsd:complexType name="CT_Document">
+//     <xsd:complexContent>
+//         <xsd:extension base="CT_DocumentBase">
+//             <xsd:sequence>
+//                 <xsd:element name="body" type="CT_Body" minOccurs="0" maxOccurs="1"/>
+//             </xsd:sequence>
+//             <xsd:attribute name="conformance" type="s:ST_ConformanceClass"/>
+//             <xsd:attribute ref="mc:Ignorable" use="optional" />
+//         </xsd:extension>
+//     </xsd:complexContent>
+// </xsd:complexType>
+//
+// <xsd:complexType name="CT_DocumentBase">
+//     <xsd:sequence>
+//         <xsd:element name="background" type="CT_Background" minOccurs="0"/>
+//     </xsd:sequence>
+// </xsd:complexType>
 export class Document extends XmlComponent {
     private readonly body: Body;
 
diff --git a/src/file/numbering/abstract-numbering.ts b/src/file/numbering/abstract-numbering.ts
index 363d233ac9..6c4af129c3 100644
--- a/src/file/numbering/abstract-numbering.ts
+++ b/src/file/numbering/abstract-numbering.ts
@@ -1,8 +1,24 @@
+import { decimalNumber } from "file/values";
 import { XmlAttributeComponent, XmlComponent } from "file/xml-components";
 
 import { ILevelsOptions, Level } from "./level";
 import { MultiLevelType } from "./multi-level-type";
 
+// <xsd:complexType name="CT_AbstractNum">
+// <xsd:sequence>
+//   <xsd:element name="nsid" type="CT_LongHexNumber" minOccurs="0"/>
+//   <xsd:element name="multiLevelType" type="CT_MultiLevelType" minOccurs="0"/>
+//   <xsd:element name="tmpl" type="CT_LongHexNumber" minOccurs="0"/>
+//   <xsd:element name="name" type="CT_String" minOccurs="0"/>
+//   <xsd:element name="styleLink" type="CT_String" minOccurs="0"/>
+//   <xsd:element name="numStyleLink" type="CT_String" minOccurs="0"/>
+//   <xsd:element name="lvl" type="CT_Lvl" minOccurs="0" maxOccurs="9"/>
+// </xsd:sequence>
+// <xsd:attribute name="abstractNumId" type="ST_DecimalNumber" use="required"/>
+// </xsd:complexType>
+
+// <xsd:attribute name="restartNumberingAfterBreak" type="w12:ST_OnOff"/>
+// https://docs.microsoft.com/en-us/openspecs/office_standards/ms-docx/cbddeff8-01aa-4486-a48e-6a83dede4f13
 class AbstractNumberingAttributes extends XmlAttributeComponent<{
     readonly abstractNumId: number;
     readonly restartNumberingAfterBreak: number;
@@ -20,7 +36,7 @@ export class AbstractNumbering extends XmlComponent {
         super("w:abstractNum");
         this.root.push(
             new AbstractNumberingAttributes({
-                abstractNumId: id,
+                abstractNumId: decimalNumber(id),
                 restartNumberingAfterBreak: 0,
             }),
         );
diff --git a/src/file/numbering/level.ts b/src/file/numbering/level.ts
index d189e24e01..93fcbe6f67 100644
--- a/src/file/numbering/level.ts
+++ b/src/file/numbering/level.ts
@@ -1,5 +1,6 @@
 // http://officeopenxml.com/WPnumbering-numFmt.php
-import { Attributes, XmlAttributeComponent, XmlComponent } from "file/xml-components";
+import { decimalNumber } from "file/values";
+import { Attributes, NumberValueElement, XmlAttributeComponent, XmlComponent } from "file/xml-components";
 import { AlignmentType } from "../paragraph/formatting";
 import { IParagraphStylePropertiesOptions, ParagraphProperties } from "../paragraph/properties";
 import { IRunStylePropertiesOptions, RunProperties } from "../paragraph/run/properties";
@@ -31,17 +32,10 @@ class LevelAttributes extends XmlAttributeComponent<{
     };
 }
 
-class Start extends XmlComponent {
-    constructor(value: number) {
-        super("w:start");
-        this.root.push(
-            new Attributes({
-                val: value,
-            }),
-        );
-    }
-}
-
+// <xsd:complexType name="CT_NumFmt">
+//     <xsd:attribute name="val" type="ST_NumberFormat" use="required"/>
+//     <xsd:attribute name="format" type="s:ST_String" use="optional"/>
+// </xsd:complexType>
 class NumberFormat extends XmlComponent {
     constructor(value: string) {
         super("w:numFmt");
@@ -53,6 +47,10 @@ class NumberFormat extends XmlComponent {
     }
 }
 
+// <xsd:complexType name="CT_LevelText">
+//     <xsd:attribute name="val" type="s:ST_String" use="optional"/>
+//     <xsd:attribute name="null" type="s:ST_OnOff" use="optional"/>
+// </xsd:complexType>
 class LevelText extends XmlComponent {
     constructor(value: string) {
         super("w:lvlText");
@@ -94,6 +92,16 @@ export interface ILevelsOptions {
     };
 }
 
+// <xsd:complexType name="CT_LevelSuffix">
+//     <xsd:attribute name="val" type="ST_LevelSuffix" use="required"/>
+// </xsd:complexType>
+//     <xsd:simpleType name="ST_LevelSuffix">
+//         <xsd:restriction base="xsd:string">
+//             <xsd:enumeration value="tab"/>
+//             <xsd:enumeration value="space"/>
+//             <xsd:enumeration value="nothing"/>
+//         </xsd:restriction>
+//     </xsd:simpleType>
 class Suffix extends XmlComponent {
     constructor(value: LevelSuffix) {
         super("w:suff");
@@ -105,6 +113,25 @@ class Suffix extends XmlComponent {
     }
 }
 
+// <xsd:complexType name="CT_Lvl">
+//     <xsd:sequence>
+//         <xsd:element name="start" type="CT_DecimalNumber" minOccurs="0"/>
+//         <xsd:element name="numFmt" type="CT_NumFmt" minOccurs="0"/>
+//         <xsd:element name="lvlRestart" type="CT_DecimalNumber" minOccurs="0"/>
+//         <xsd:element name="pStyle" type="CT_String" minOccurs="0"/>
+//         <xsd:element name="isLgl" type="CT_OnOff" minOccurs="0"/>
+//         <xsd:element name="suff" type="CT_LevelSuffix" minOccurs="0"/>
+//         <xsd:element name="lvlText" type="CT_LevelText" minOccurs="0"/>
+//         <xsd:element name="lvlPicBulletId" type="CT_DecimalNumber" minOccurs="0"/>
+//         <xsd:element name="legacy" type="CT_LvlLegacy" minOccurs="0"/>
+//         <xsd:element name="lvlJc" type="CT_Jc" minOccurs="0"/>
+//         <xsd:element name="pPr" type="CT_PPrGeneral" minOccurs="0"/>
+//         <xsd:element name="rPr" type="CT_RPr" minOccurs="0"/>
+//     </xsd:sequence>
+//     <xsd:attribute name="ilvl" type="ST_DecimalNumber" use="required"/>
+//     <xsd:attribute name="tplc" type="ST_LongHexNumber" use="optional"/>
+//     <xsd:attribute name="tentative" type="s:ST_OnOff" use="optional"/>
+// </xsd:complexType>
 export class LevelBase extends XmlComponent {
     private readonly paragraphProperties: ParagraphProperties;
     private readonly runProperties: RunProperties;
@@ -112,7 +139,7 @@ export class LevelBase extends XmlComponent {
     constructor({ level, format, text, alignment = AlignmentType.START, start = 1, style, suffix }: ILevelsOptions) {
         super("w:lvl");
 
-        this.root.push(new Start(start));
+        this.root.push(new NumberValueElement("w:start", decimalNumber(start)));
 
         if (format) {
             this.root.push(new NumberFormat(format));
@@ -136,7 +163,7 @@ export class LevelBase extends XmlComponent {
 
         this.root.push(
             new LevelAttributes({
-                ilvl: level,
+                ilvl: decimalNumber(level),
                 tentative: 1,
             }),
         );
diff --git a/src/file/numbering/multi-level-type.ts b/src/file/numbering/multi-level-type.ts
index c73ebec3cf..c2d53bb8cf 100644
--- a/src/file/numbering/multi-level-type.ts
+++ b/src/file/numbering/multi-level-type.ts
@@ -1,5 +1,19 @@
 import { Attributes, XmlComponent } from "file/xml-components";
 
+// <xsd:complexType name="CT_AbstractNum">
+//     ...
+//     <xsd:element name="multiLevelType" type="CT_MultiLevelType" minOccurs="0"/>
+
+//         <xsd:complexType name="CT_MultiLevelType">
+//             <xsd:attribute name="val" type="ST_MultiLevelType" use="required"/>
+//         </xsd:complexType>
+//             <xsd:simpleType name="ST_MultiLevelType">
+//                 <xsd:restriction base="xsd:string">
+//                     <xsd:enumeration value="singleLevel"/>
+//                     <xsd:enumeration value="multilevel"/>
+//                     <xsd:enumeration value="hybridMultilevel"/>
+//                 </xsd:restriction>
+//             </xsd:simpleType>
 export class MultiLevelType extends XmlComponent {
     constructor(value: string) {
         super("w:multiLevelType");
diff --git a/src/file/numbering/num.ts b/src/file/numbering/num.ts
index 526d0f1b9f..87cd399a96 100644
--- a/src/file/numbering/num.ts
+++ b/src/file/numbering/num.ts
@@ -1,3 +1,4 @@
+import { decimalNumber } from "file/values";
 import { Attributes, XmlAttributeComponent, XmlComponent } from "file/xml-components";
 
 class AbstractNumId extends XmlComponent {
@@ -28,6 +29,17 @@ export interface IConcreteNumberingOptions {
     };
 }
 
+// <xsd:complexType name="CT_Numbering">
+//     ...
+//     <xsd:element name="num" type="CT_Num" minOccurs="0" maxOccurs="unbounded"/>
+
+//         <xsd:complexType name="CT_Num">
+//             <xsd:sequence>
+//                 <xsd:element name="abstractNumId" type="CT_DecimalNumber" minOccurs="1"/>
+//                 <xsd:element name="lvlOverride" type="CT_NumLvl" minOccurs="0" maxOccurs="9"/>
+//             </xsd:sequence>
+//             <xsd:attribute name="numId" type="ST_DecimalNumber" use="required"/>
+//         </xsd:complexType>
 export class ConcreteNumbering extends XmlComponent {
     public readonly numId: number;
     public readonly reference: string;
@@ -42,11 +54,11 @@ export class ConcreteNumbering extends XmlComponent {
 
         this.root.push(
             new NumAttributes({
-                numId: options.numId,
+                numId: decimalNumber(options.numId),
             }),
         );
 
-        this.root.push(new AbstractNumId(options.abstractNumId));
+        this.root.push(new AbstractNumId(decimalNumber(options.abstractNumId)));
 
         if (options.overrideLevel) {
             this.root.push(new LevelOverride(options.overrideLevel.num, options.overrideLevel.start));
diff --git a/src/file/numbering/numbering.ts b/src/file/numbering/numbering.ts
index 6b95f0d222..8f37b386c5 100644
--- a/src/file/numbering/numbering.ts
+++ b/src/file/numbering/numbering.ts
@@ -16,6 +16,16 @@ export interface INumberingOptions {
     }[];
 }
 
+// <xsd:element name="numbering" type="CT_Numbering"/>
+//
+//     <xsd:complexType name="CT_Numbering">
+//         <xsd:sequence>
+//             <xsd:element name="numPicBullet" type="CT_NumPicBullet" minOccurs="0" maxOccurs="unbounded"/>
+//             <xsd:element name="abstractNum" type="CT_AbstractNum" minOccurs="0" maxOccurs="unbounded"/>
+//             <xsd:element name="num" type="CT_Num" minOccurs="0" maxOccurs="unbounded"/>
+//             <xsd:element name="numIdMacAtCleanup" type="CT_DecimalNumber" minOccurs="0"/>
+//         </xsd:sequence>
+//     </xsd:complexType>
 export class Numbering extends XmlComponent {
     private readonly abstractNumberingMap = new Map<string, AbstractNumbering>();
     private readonly concreteNumberingMap = new Map<string, ConcreteNumbering>();