diff --git a/build/ci-cd/copy-and-convert-content.sh b/build/ci-cd/copy-and-convert-content.sh
index ad69c070c2..f6635d911e 100755
--- a/build/ci-cd/copy-and-convert-content.sh
+++ b/build/ci-cd/copy-and-convert-content.sh
@@ -151,7 +151,7 @@ while IFS="|" read path format model converttoformats || [[ -n "$path" ]]; do
         case $altformat in
         json)
           # Remove extra slashes
-          perl -pi -e 's,\\/,/,g' "${dest}"
+          # perl -pi -e 's,\\/,/,g' "${dest}"
           # translate OSCAL mime types
           perl -pi -e 's,(application/oscal\.[a-z]+\+)xml\",\1json\",g' "${dest}"
           # relative content paths
diff --git a/build/metaschema/unit-testing/datatypes/datatypes-prose_test-valid-PASS.json b/build/metaschema/unit-testing/datatypes/datatypes-prose_test_valid_PASS.json
similarity index 100%
rename from build/metaschema/unit-testing/datatypes/datatypes-prose_test-valid-PASS.json
rename to build/metaschema/unit-testing/datatypes/datatypes-prose_test_valid_PASS.json
diff --git a/build/metaschema/unit-testing/datatypes/datatypes-uri_json-schema.json b/build/metaschema/unit-testing/datatypes/datatypes-uri_json-schema.json
new file mode 100644
index 0000000000..b57380947d
--- /dev/null
+++ b/build/metaschema/unit-testing/datatypes/datatypes-uri_json-schema.json
@@ -0,0 +1,59 @@
+
+  { "$schema" : "http://json-schema.org/draft-07/schema#",
+    "$id" : "http://csrc.nist.gov/ns/metaschema/unit-test/datatypes-uri-schema.json",
+    "$comment" : "Metaschema Unit Test: URIs: JSON Schema",
+    "type" : "object",
+    "definitions" : 
+    { "parent" : 
+      { "title" : "parent",
+        "description" : "parent assembly",
+        "$id" : "#/definitions/parent",
+        "type" : "object",
+        "properties" : 
+        { "uri-flag" : 
+          { "title" : "Universal Resource Identifier Flag",
+            "description" : "Per W3C",
+            "type" : "string",
+            "format" : "uri" },
+          "uri-reference-flag" : 
+          { "title" : "Universal Resource Identifier Reference Flag",
+            "description" : "Per W3C, can be a relative URI",
+            "type" : "string",
+            "format" : "uri-reference" },
+          "uri-fields" : 
+          { "anyOf" : 
+            [ 
+              { "$ref" : "#/definitions/uri-field" },
+              
+              { "type" : "array",
+                "items" : 
+                { "$ref" : "#/definitions/uri-field" },
+                "minItems" : 2 } ] },
+          "uri-reference-fields" : 
+          { "anyOf" : 
+            [ 
+              { "$ref" : "#/definitions/uri-reference-field" },
+              
+              { "type" : "array",
+                "items" : 
+                { "$ref" : "#/definitions/uri-reference-field" },
+                "minItems" : 2 } ] } },
+        "required" : 
+        [ "uri-flag",
+          "uri-reference-flag" ],
+        "additionalProperties" : false },
+      "uri-field" : 
+      { "title" : "Universal Resource Identifier Flag",
+        "description" : "Per W3C",
+        "$id" : "#/definitions/uri-field",
+        "type" : "string",
+        "format" : "uri" },
+      "uri-reference-field" : 
+      { "title" : "Universal Resource Identifier Flag",
+        "description" : "Per W3C",
+        "$id" : "#/definitions/uri-reference-field",
+        "type" : "string",
+        "format" : "uri-reference" } },
+    "properties" : 
+    { "parent" : 
+      { "$ref" : "#/definitions/parent" } } }
\ No newline at end of file
diff --git a/build/metaschema/unit-testing/datatypes/datatypes-uri_metaschema.xml b/build/metaschema/unit-testing/datatypes/datatypes-uri_metaschema.xml
new file mode 100644
index 0000000000..8438508592
--- /dev/null
+++ b/build/metaschema/unit-testing/datatypes/datatypes-uri_metaschema.xml
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- OSCAL CATALOG METASCHEMA -->
+<!-- validate with XSD and Schematron (linked) -->
+<?xml-model href="../../lib/metaschema-check.sch" type="application/xml" schematypens="http://purl.oclc.org/dsdl/schematron"?>
+<?xml-stylesheet type="text/css" href="../../lib/metaschema-author.css"?>
+<METASCHEMA xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://csrc.nist.gov/ns/oscal/metaschema/1.0 ../../lib/metaschema.xsd"
+ xmlns="http://csrc.nist.gov/ns/oscal/metaschema/1.0"
+ xmlns:o="http://csrc.nist.gov/ns/oscal/example"
+ root="parent">
+  <schema-name>Metaschema Unit Test: URIs</schema-name>
+  <schema-version>1.0-milestone1</schema-version>
+  <short-name>metaschema-datatypes-uri</short-name>
+  <namespace>http://csrc.nist.gov/ns/metaschema/unit-test/datatypes-uri</namespace>
+
+  <define-assembly name="parent">
+    <formal-name>parent</formal-name>
+    <description>parent assembly</description>
+    <flag name="uri-flag" as-type="uri" required="yes">
+      <formal-name>Universal Resource Identifier Flag</formal-name>
+      <description>Per W3C</description>
+    </flag>
+    <flag name="uri-reference-flag" as-type="uri-reference" required="yes">
+      <formal-name>Universal Resource Identifier Reference Flag</formal-name>
+      <description>Per W3C, can be a relative URI</description>
+    </flag>
+    <model>
+      <field ref="uri-field" max-occurs="unbounded">
+        <group-as name="uri-fields"/>
+      </field>
+      <field ref="uri-reference-field" max-occurs="unbounded">
+        <group-as name="uri-reference-fields"/>
+      </field>
+    </model>
+  </define-assembly>
+
+  
+  <define-field name="uri-field" as-type="uri">
+    <formal-name>Universal Resource Identifier Flag</formal-name>
+    <description>Per W3C</description>
+  </define-field>
+  
+  <define-field name="uri-reference-field" as-type="uri-reference">
+    <formal-name>Universal Resource Identifier Flag</formal-name>
+    <description>Per W3C</description>
+  </define-field>
+  
+</METASCHEMA>
diff --git a/build/metaschema/unit-testing/datatypes/datatypes-uri_test_broken_FAIL.json b/build/metaschema/unit-testing/datatypes/datatypes-uri_test_broken_FAIL.json
new file mode 100644
index 0000000000..f3d397c104
--- /dev/null
+++ b/build/metaschema/unit-testing/datatypes/datatypes-uri_test_broken_FAIL.json
@@ -0,0 +1,13 @@
+{
+  "parent": {
+    "uri-flag": "//pages.nist.gov/OSCAL",
+    "uri-reference-flag": "c:\\OSCAL",
+    "uri-fields": [
+      "https://www.w3.org{}",
+      "https://www.w3.org/%%%%",
+      "http://www.nist.gov?x-y=z"
+    ],
+    "uri-reference-fields": [ "(|)" ]
+    
+  }
+}
diff --git a/build/metaschema/unit-testing/datatypes/datatypes-uri_test_valid_PASS.json b/build/metaschema/unit-testing/datatypes/datatypes-uri_test_valid_PASS.json
new file mode 100644
index 0000000000..a9ccf6c8b7
--- /dev/null
+++ b/build/metaschema/unit-testing/datatypes/datatypes-uri_test_valid_PASS.json
@@ -0,0 +1,12 @@
+{
+  "parent": {
+    "uri-flag": "http://pages.nist.gov/OSCAL",
+    "uri-reference-flag": "OSCAL",
+    "uri-fields": [
+      "gopher://loc.gov",
+      "https://www.w3.org",
+      "http://www.nist.gov"
+    ],
+    "uri-reference-fields": "myhomepage.html"
+  }
+}