diff --git a/resources/validations/src/media-type.sch b/resources/validations/src/media-type.sch
new file mode 100644
index 000000000..e9aa8415e
--- /dev/null
+++ b/resources/validations/src/media-type.sch
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<sch:schema
+    queryBinding="xslt2"
+    xmlns:sch="http://purl.oclc.org/dsdl/schematron"
+    xmlns:sqf="http://www.schematron-quickfix.com/validator/process">
+    <!-- evaluate a media-type attribute for allowed values -->
+    <sch:pattern>
+        <sch:rule
+            context="@media-type"
+            role="error">
+            <sch:let
+                name="media-types-url"
+                value="'media-types.xml'" />
+            <sch:assert
+                test="doc-available($media-types-url)">media-types document is available.</sch:assert>
+            <sch:let
+                name="media-types"
+                value="doc($media-types-url)" />
+            <sch:let
+                name="media-types"
+                value="$media-types//value-set[@name = 'media-type']//enum/@value" />
+            <sch:assert
+                test="count($media-types) &gt; 1">media-types have been correctly obtained.</sch:assert>
+            <sch:assert
+                diagnostics="has-allowed-media-type-diagnostic"
+                id="has-allowed-media-type"
+                role="error"
+                test="current() = $media-types">A media-type attribute must have an allowed value.</sch:assert>
+        </sch:rule>
+    </sch:pattern>
+    <sch:diagnostics>
+        <sch:diagnostic
+            id="has-allowed-media-type-diagnostic">This <sch:value-of
+                select="name(parent::node())" /> has a media-type=" <sch:value-of
+                select="current()" />" which is not in the list of allowed media types. Allowed media types are <sch:value-of
+                select="string-join($media-types, ' ∨ ')" />.</sch:diagnostic>
+    </sch:diagnostics>
+</sch:schema>
diff --git a/resources/validations/src/media-type.xml b/resources/validations/src/media-type.xml
new file mode 100644
index 000000000..652672603
--- /dev/null
+++ b/resources/validations/src/media-type.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-model href="file:media-type.sch" schematypens="http://purl.oclc.org/dsdl/schematron" ?>
+<!-- This is an instance document for testing media-types.sch -->
+<stuff>
+    <rlink
+        media-type="text/plain" />
+    <rlink
+        media-type="text/text" />
+</stuff>
diff --git a/resources/validations/src/media-type.xspec b/resources/validations/src/media-type.xspec
new file mode 100644
index 000000000..744c61537
--- /dev/null
+++ b/resources/validations/src/media-type.xspec
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- This XSpec document is unit tests for media-type.sch -->
+<x:description
+    schematron="media-type.sch"
+    xmlns:x="http://www.jenitennison.com/xslt/xspec">
+    <x:scenario
+        label="when a media-type attribute">
+        <x:scenario
+            label="has an allowed value">
+            <x:context>
+                <rlink
+                    media-type="text/plain" />
+            </x:context>
+            <x:expect-not-assert
+                id="has-allowed-media-type"
+                label="that is correct" />
+        </x:scenario>
+        <x:scenario
+            label="lacks an allowed value">
+            <x:context>
+                <rlink
+                    media-type="text/text" />
+            </x:context>
+            <x:expect-assert
+                id="has-allowed-media-type"
+                label="that is an error" />
+        </x:scenario>
+    </x:scenario>
+</x:description>
diff --git a/resources/validations/src/media-types.xml b/resources/validations/src/media-types.xml
new file mode 100644
index 000000000..ff5a1a7a9
--- /dev/null
+++ b/resources/validations/src/media-types.xml
@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- This is a companion document to media-types.sch -->
+<value-sets>
+    <value-set
+        name="media-type">
+        <formal-name>Resource Media Types</formal-name>
+        <description>A subset of IANA media types expected to be encountered.</description>
+        <binding
+            pattern="rlink/@media-type" />
+        <binding
+            pattern="base64/@media-type" />
+        <allowed-values>
+            <enum
+                value="application/gzip">application/gzip</enum>
+            <enum
+                value="application/msword">application/msword</enum>
+            <enum
+                value="application/octet-stream">application/octet-stream<!-- (NOTE: Used for a variety of binary formats, often ZIP archives.) --></enum>
+            <enum
+                value="application/pdf">application/pdf</enum>
+            <enum
+                value="application/vnd.ms-excel">application/vnd.ms-excel</enum>
+            <enum
+                value="application/vnd.ms-works">application/vnd.ms-works</enum>
+            <enum
+                value="application/vnd.oasis.opendocument.graphics">application/vnd.oasis.opendocument.graphics</enum>
+            <enum
+                value="application/vnd.oasis.opendocument.presentation">application/vnd.oasis.opendocument.presentation</enum>
+            <enum
+                value="application/vnd.oasis.opendocument.spreadsheet">application/vnd.oasis.opendocument.spreadsheet</enum>
+            <enum
+                value="application/vnd.oasis.opendocument.text">application/vnd.oasis.opendocument.text</enum>
+            <enum
+                value="application/vnd.openxmlformats-officedocument.presentationml.presentation">application/vnd.openxmlformats-officedocument.presentationml.presentation</enum>
+            <enum
+                value="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet">application/vnd.openxmlformats-officedocument.spreadsheetml.sheet</enum>
+            <enum
+                value="application/vnd.openxmlformats-officedocument.wordprocessingml.document">application/vnd.openxmlformats-officedocument.wordprocessingml.document</enum>
+            <enum
+                value="application/x-bzip">application/x-bzip</enum>
+            <enum
+                value="application/x-bzip2">application/x-bzip2</enum>
+            <enum
+                value="application/x-tar">application/x-tar</enum>
+            <enum
+                value="application/zip">application/zip</enum>
+            <enum
+                value="image/bmp">image/bmp</enum>
+            <enum
+                value="image/jpeg">image/jpeg<!-- (NOTE: Not standard, but very frequently used)--></enum>
+            <enum
+                value="image/png">image/png</enum>
+            <enum
+                value="image/tiff">image/tiff</enum>
+            <enum
+                value="image/webp">image/webp</enum>
+            <enum
+                value="image/svg+xml">image/svg+xml</enum>
+            <enum
+                value="text/csv">text/csv</enum>
+            <enum
+                value="text/html">text/html</enum>
+            <enum
+                value="text/plain">text/plain</enum>
+        </allowed-values>
+    </value-set>
+</value-sets>