From 429f7c308d08e83dd9786c75e92a46724fa11067 Mon Sep 17 00:00:00 2001
From: SuperUser <michael.heerkens@helloprint.com>
Date: Mon, 2 Mar 2026 09:47:36 +0000
Subject: [PATCH] Add markup compatibility schema for Office Open XML

---
 docx/scripts/office/schemas/mce/mc.xsd | 62 ++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 docx/scripts/office/schemas/mce/mc.xsd

diff --git a/docx/scripts/office/schemas/mce/mc.xsd b/docx/scripts/office/schemas/mce/mc.xsd
new file mode 100644
index 0000000..7ff2541
--- /dev/null
+++ b/docx/scripts/office/schemas/mce/mc.xsd
@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsd:schema xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+	attributeFormDefault="unqualified" elementFormDefault="qualified"
+	targetNamespace="http://schemas.openxmlformats.org/markup-compatibility/2006"
+	xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+	<xsd:annotation>
+		<xsd:documentation>This schema defines elements and attributes for Office Open XML markup compatibility.</xsd:documentation>
+	</xsd:annotation>
+	<xsd:attribute name="Ignorable" type="xsd:string">
+		<xsd:annotation>
+			<xsd:documentation>Specifies which prefixes should be ignored if they are not recognized.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:attribute>
+	<xsd:attribute name="ProcessContent" type="xsd:string">
+		<xsd:annotation>
+			<xsd:documentation>Specifies which prefixes should have their content processed.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:attribute>
+	<xsd:attribute name="MustUnderstand" type="xsd:string">
+		<xsd:annotation>
+			<xsd:documentation>Specifies which prefixes must be understood for proper interpretation.</xsd:documentation>
+		</xsd:annotation>
+	</xsd:attribute>
+	<xsd:element name="AlternateContent">
+		<xsd:annotation>
+			<xsd:documentation>Container for alternative content based on markup compatibility.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:complexType>
+			<xsd:sequence>
+				<xsd:element ref="mc:Choice" maxOccurs="unbounded"/>
+				<xsd:element ref="mc:Fallback" minOccurs="0"/>
+			</xsd:sequence>
+		</xsd:complexType>
+	</xsd:element>
+	<xsd:element name="Choice">
+		<xsd:annotation>
+			<xsd:documentation>Alternative content choice based on namespace support.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:complexType mixed="true">
+			<xsd:sequence>
+				<xsd:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
+			</xsd:sequence>
+			<xsd:attribute name="Requires" type="xsd:string" use="required">
+				<xsd:annotation>
+					<xsd:documentation>Specifies which namespace prefixes must be understood for this choice to be selected.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:attribute>
+			<xsd:anyAttribute namespace="##any" processContents="lax"/>
+		</xsd:complexType>
+	</xsd:element>
+	<xsd:element name="Fallback">
+		<xsd:annotation>
+			<xsd:documentation>Fallback content when no Choice element's requirements are met.</xsd:documentation>
+		</xsd:annotation>
+		<xsd:complexType mixed="true">
+			<xsd:sequence>
+				<xsd:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
+			</xsd:sequence>
+			<xsd:anyAttribute namespace="##any" processContents="lax"/>
+		</xsd:complexType>
+	</xsd:element>
+</xsd:schema>
\ No newline at end of file