diff --git a/xlsx/scripts/office/schemas/ISO-IEC29500-4_2016/shared-documentPropertiesCustom.xsd b/xlsx/scripts/office/schemas/ISO-IEC29500-4_2016/shared-documentPropertiesCustom.xsd
new file mode 100644
index 0000000..9231ab7
--- /dev/null
+++ b/xlsx/scripts/office/schemas/ISO-IEC29500-4_2016/shared-documentPropertiesCustom.xsd
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
+ xmlns="http://schemas.openxmlformats.org/officeDocument/2006/custom-properties"
+ targetNamespace="http://schemas.openxmlformats.org/officeDocument/2006/custom-properties"
+ elementFormDefault="qualified">
+ <xsd:import namespace="http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes"
+  schemaLocation="shared-documentPropertiesVariantTypes.xsd"/>
+ <xsd:element name="Properties" type="CT_Properties"/>
+ <xsd:complexType name="CT_Properties">
+  <xsd:sequence>
+   <xsd:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
+  </xsd:sequence>
+ </xsd:complexType>
+</xsd:schema>