diff --git a/src/epub/content.opf b/src/epub/content.opf
index 1ad164b..ccef9e8 100644
--- a/src/epub/content.opf
+++ b/src/epub/content.opf
@@ -21,13 +21,13 @@
 		<meta property="schema:accessMode">visual</meta>
 		<meta property="schema:accessModeSufficient">textual</meta>
 		<meta property="schema:accessibilityFeature">alternativeText</meta>
+		<meta property="schema:accessibilityFeature">displayTransformability</meta>
 		<meta property="schema:accessibilityFeature">readingOrder</meta>
 		<meta property="schema:accessibilityFeature">structuralNavigation</meta>
 		<meta property="schema:accessibilityFeature">tableOfContents</meta>
 		<meta property="schema:accessibilityFeature">unlocked</meta>
 		<meta property="schema:accessibilityHazard">none</meta>
 		<meta property="schema:accessibilitySummary">This publication conforms to WCAG 2.2 Level AA.</meta>
-		<link href="onix.xml" media-type="application/xml" properties="onix" rel="record"/>
 		<dc:title id="title">The Origin of Species</dc:title>
 		<meta property="file-as" refines="#title">Origin of Species, The</meta>
 		<meta property="title-type" refines="#title">main</meta>
diff --git a/src/epub/onix.xml b/src/epub/onix.xml
deleted file mode 100644
index 70055b5..0000000
--- a/src/epub/onix.xml
+++ /dev/null
@@ -1,70 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<ONIXMessage xmlns="http://ns.editeur.org/onix/3.1/reference" release="3.1">
-	<Header>
-		<Sender>
-			<SenderName>Standard Ebooks</SenderName>
-		</Sender>
-		<SentDateTime>2024-05-01T00:00:00Z</SentDateTime>
-	</Header>
-	<Product>
-		<DescriptiveDetail>
-			<ProductFormFeature>
-				<!--Compliant with ePub Accessibility Spec v1.1-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>04</ProductFormFeatureValue>
-			</ProductFormFeature>
-			<ProductFormFeature>
-				<!--No reading system accessibility options disabled-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>10</ProductFormFeatureValue>
-			</ProductFormFeature>
-			<ProductFormFeature>
-				<!--Table of contents navigation-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>11</ProductFormFeatureValue>
-			</ProductFormFeature>
-			<ProductFormFeature>
-				<!--Reading order-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>13</ProductFormFeatureValue>
-			</ProductFormFeature>
-			<ProductFormFeature>
-				<!--Short alternative descriptions-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>14</ProductFormFeatureValue>
-			</ProductFormFeature>
-			<ProductFormFeature>
-				<!--Language tagging provided-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>22</ProductFormFeatureValue>
-			</ProductFormFeature>
-			<ProductFormFeature>
-				<!--All non-decorative content supports reading without sight-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>52</ProductFormFeatureValue>
-			</ProductFormFeature>
-			<ProductFormFeature>
-				<!--WCAG v2.2-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>82</ProductFormFeatureValue>
-			</ProductFormFeature>
-			<ProductFormFeature>
-				<!--WCAG level AA-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>85</ProductFormFeatureValue>
-			</ProductFormFeature>
-			<ProductFormFeature>
-				<!--Publisher’s web page for detailed accessibility information-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>96</ProductFormFeatureValue>
-				<ProductFormFeatureDescription>https://standardebooks.org/about/accessibility</ProductFormFeatureDescription>
-			</ProductFormFeature>
-			<ProductFormFeature>
-				<!--Publisher contact for further accessibility information-->
-				<ProductFormFeatureType>09</ProductFormFeatureType>
-				<ProductFormFeatureValue>99</ProductFormFeatureValue>
-				<ProductFormFeatureDescription>standardebooks@googlegroups.com</ProductFormFeatureDescription>
-			</ProductFormFeature>
-		</DescriptiveDetail>
-	</Product>
-</ONIXMessage>