Serialise a QTI item's language as xml:lang and run the item schema's Schematron rules

contentcuration/contentcuration/tests/utils/qti/fixtures/free_response_no_answers.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="string" />
     <qti-outcome-declaration identifier="SCORE" cardinality="single" base-type="float" />
     <qti-item-body>

contentcuration/contentcuration/tests/utils/qti/fixtures/free_response_with_maths.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="string">
         <qti-correct-response>
             <qti-value>Nothing</qti-value>

contentcuration/contentcuration/tests/utils/qti/fixtures/input_question.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K_ty6CYdlQyH-3LoJh2VDIQ" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="multiple" base-type="float">
         <qti-correct-response>
             <qti-value>1</qti-value>

contentcuration/contentcuration/tests/utils/qti/fixtures/math_content_choice_interaction.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K3d3d3d3d3d3d3d3d3d3d3Q" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="K3d3d3d3d3d3d3d3d3d3d3Q" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="identifier">
         <qti-correct-response>
             <qti-value>choice_0</qti-value>

contentcuration/contentcuration/tests/utils/qti/fixtures/multiple_selection.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="Kq83vEjRWeJCrze8SNFZ4kA" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="Kq83vEjRWeJCrze8SNFZ4kA" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="multiple" base-type="identifier">
         <qti-correct-response>
             <qti-value>choice_0</qti-value>

contentcuration/contentcuration/tests/utils/qti/fixtures/single_selection.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="KEjRWeJCrze8SNFZ4kKvN7w" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="KEjRWeJCrze8SNFZ4kKvN7w" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="identifier">
         <qti-correct-response>
             <qti-value>choice_0</qti-value>

contentcuration/contentcuration/tests/utils/qti/fixtures/true_false.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="KEjRWeJCrze8SNFZ4kKvN7w" title="Test Question 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="KEjRWeJCrze8SNFZ4kKvN7w" title="Test Question 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
     <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="identifier">
         <qti-correct-response>
             <qti-value>choice_0</qti-value>

contentcuration/contentcuration/tests/utils/qti/test_assessment_items.py

@@ -56,7 +56,7 @@ def test_assessment_item_with_catalog_info_orders_between_item_body_and_response
         assessment_item = AssessmentItem(
             identifier="item1",
             title="Test",
-            language="en-US",
+            xml__lang="en-US",
             item_body=item_body,
             catalog_info=catalog_info,
             response_processing=response_processing,
@@ -78,7 +78,7 @@ def test_true_false_question(self):
  title="BG true false example "
  adaptive="false"
  time-dependent="false"
- language="en-US"
+ xml:lang="en-US"
  tool-name="kolibri"
  tool-version="0.1">
 <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="identifier">
@@ -139,7 +139,7 @@ def test_true_false_question(self):
         assessment_item = AssessmentItem(
             identifier="beginnersguide007",
             title="BG true false example ",
-            language="EN-US",
+            xml__lang="EN-US",
             time_dependent=False,
             item_body=item_body,
             response_declaration=[response_declaration],
@@ -162,7 +162,7 @@ def test_multiple_choice_question(self):
  title="BG Choice example"
  adaptive="false"
  time-dependent="false"
- language="en-US"
+ xml:lang="en-US"
  tool-name="kolibri"
  tool-version="0.1">
 <qti-response-declaration identifier="RESPONSE" cardinality="multiple" base-type="identifier">
@@ -257,7 +257,7 @@ def test_multiple_choice_question(self):
         assessment_item = AssessmentItem(
             identifier="beginnersguide008",
             title="BG Choice example",
-            language="EN-US",
+            xml__lang="EN-US",
             time_dependent=False,
             item_body=item_body,
             response_declaration=[response_declaration],
@@ -277,7 +277,7 @@ def test_long_text_question(self):
  title="BG Postcard example"
  adaptive="false"
  time-dependent="false"
- language="en-US"
+ xml:lang="en-US"
  tool-name="kolibri"
  tool-version="0.1">
 <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="string" />
@@ -350,7 +350,7 @@ def test_long_text_question(self):
         assessment_item = AssessmentItem(
             identifier="beginnersguide009",
             title="BG Postcard example",
-            language="en-US",
+            xml__lang="en-US",
             time_dependent=False,
             item_body=item_body,
             response_declaration=[response_declaration],
@@ -369,7 +369,7 @@ def test_missing_word_question(self):
  title="BG Missing Word example"
  adaptive="false"
  time-dependent="false"
- language="en-US"
+ xml:lang="en-US"
  tool-name="kolibri"
  tool-version="0.1">
 <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="string">
@@ -460,7 +460,7 @@ def test_missing_word_question(self):
         assessment_item = AssessmentItem(
             identifier="beginnersguide010",
             title="BG Missing Word example",
-            language="en-US",
+            xml__lang="en-US",
             time_dependent=False,
             item_body=item_body,
             response_declaration=[response_declaration],
@@ -480,7 +480,7 @@ def test_numerical_entry_question(self):
  title="Numerical Entry Question"
  adaptive="false"
  time-dependent="false"
- language="en-US"
+ xml:lang="en-US"
  tool-name="kolibri"
  tool-version="0.1">
 <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="float">
@@ -525,7 +525,7 @@ def test_numerical_entry_question(self):
         assessment_item = AssessmentItem(
             identifier="numerical-entry-item",
             title="Numerical Entry Question",
-            language="en-US",
+            xml__lang="en-US",
             time_dependent=False,
             item_body=ItemBody(
                 children=[

contentcuration/contentcuration/tests/utils/qti/test_qti.py

@@ -220,10 +220,10 @@ def test_assessment_item_element(self):
         assessment_item_element = AssessmentItem(
             identifier="item_1",
             title="Test Assessment Item",
-            language="en-US",
+            xml__lang="en-US",
             item_body=item_body,
         )
-        expected_xml = '<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="item_1" title="Test Assessment Item" adaptive="false" language="en-US" tool-name="kolibri" tool-version="0.1"><qti-item-body><p>Test Item Body Content</p></qti-item-body></qti-assessment-item>'  # noqa: E501
+        expected_xml = '<qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="item_1" title="Test Assessment Item" adaptive="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1"><qti-item-body><p>Test Item Body Content</p></qti-item-body></qti-assessment-item>'  # noqa: E501
         self.assertEqual(assessment_item_element.to_xml_string(), expected_xml)
 
     def test_prompt_element(self):

contentcuration/contentcuration/tests/utils/qti/test_validation.py

@@ -5,6 +5,7 @@
 from lxml import etree
 
 from contentcuration.utils.assessment.qti.validation import _compiled_schema
+from contentcuration.utils.assessment.qti.validation import _compiled_schematron
 from contentcuration.utils.assessment.qti.validation import validate_qti_item
 
 
@@ -24,7 +25,7 @@ def _item_xml(identifier, title, response_declaration, item_body):
         'xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 '
         'https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" '
         'identifier="%s" title="%s" adaptive="false" time-dependent="false" '
-        'language="en-US" tool-name="kolibri" tool-version="0.1">'
+        'xml:lang="en-US" tool-name="kolibri" tool-version="0.1">'
         "%s"
         '<qti-outcome-declaration identifier="SCORE" cardinality="single" base-type="float" />'
         "<qti-item-body>%s</qti-item-body>"
@@ -77,6 +78,25 @@ def test_rejects_missing_required_attribute(self):
         self.assertFalse(result.is_valid)
         self.assertTrue(any("time-dependent" in e.message for e in result.errors))
 
+    def test_rejects_undeclared_root_attribute(self):
+        xml = VALID_CHOICE_ITEM.replace('xml:lang="en-US"', 'language="en-US"')
+        result = validate_qti_item(xml)
+        self.assertFalse(result.is_valid)
+        self.assertTrue(
+            any(
+                "Invalid XML attribute" in e.message and "language" in e.message
+                for e in result.errors
+            )
+        )
+
+    def test_accepts_data_prefixed_root_attribute(self):
+        xml = VALID_CHOICE_ITEM.replace(
+            'tool-name="kolibri"', 'data-foo="bar" tool-name="kolibri"'
+        )
+        result = validate_qti_item(xml)
+        self.assertTrue(result.is_valid)
+        self.assertEqual(result.errors, [])
+
     def test_rejects_malformed_xml_without_raising(self):
         result = validate_qti_item("<qti-assessment-item><unclosed>")
         self.assertFalse(result.is_valid)
@@ -161,3 +181,14 @@ def test_schema_compiled_once_across_multiple_validate_calls(self):
         validate_qti_item(ORDER_INTERACTION_ITEM)
         self.assertEqual(_compiled_schema.cache_info().misses, 1)
         self.assertEqual(_compiled_schema.cache_info().hits, 2)
+
+
+class SchematronReuseTests(unittest.TestCase):
+    def test_schematron_compiled_once_across_multiple_validate_calls(self):
+        _compiled_schematron.cache_clear()
+        self.addCleanup(_compiled_schematron.cache_clear)
+        validate_qti_item(VALID_CHOICE_ITEM)
+        validate_qti_item(MATCH_INTERACTION_ITEM)
+        validate_qti_item(ORDER_INTERACTION_ITEM)
+        self.assertEqual(_compiled_schematron.cache_info().misses, 1)
+        self.assertEqual(_compiled_schematron.cache_info().hits, 2)

contentcuration/contentcuration/tests/utils/test_exercise_creation.py

@@ -1637,7 +1637,7 @@ def test_exercise_with_image(self):
             _normalize_xml(actual_manifest_xml),
         )
 
-        self.assertEqual(exercise_file.checksum, "cd5a770d35fa1c25092331ee00f4ce4a")
+        self.assertEqual(exercise_file.checksum, "08f316508478ea4710b96473d0e5e1f3")
 
     def test_image_resizing(self):
         # Create a base image file
@@ -1707,7 +1707,7 @@ def test_image_resizing(self):
 
         # Expected QTI item XML content with MathML conversion
         expected_item_xml = f"""<?xml version="1.0" encoding="UTF-8"?>
-        <qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="{qti_id}" title="Test QTI Exercise 1" adaptive="false" time-dependent="false" language="en-US" tool-name="kolibri" tool-version="0.1">
+        <qti-assessment-item xmlns="http://www.imsglobal.org/xsd/imsqtiasi_v3p0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.imsglobal.org/xsd/imsqtiasi_v3p0 https://purl.imsglobal.org/spec/qti/v3p0/schema/xsd/imsqti_asiv3p0p1_v1p0.xsd" identifier="{qti_id}" title="Test QTI Exercise 1" adaptive="false" time-dependent="false" xml:lang="en-US" tool-name="kolibri" tool-version="0.1">
         <qti-response-declaration identifier="RESPONSE" cardinality="single" base-type="identifier">
         <qti-correct-response>
         <qti-value>choice_0</qti-value>
@@ -1843,7 +1843,7 @@ def test_multiple_question_types_mixed(self):
             _normalize_xml(actual_manifest_xml),
         )
 
-        self.assertEqual(exercise_file.checksum, "f15370f74b06b59bca6e289fe0e9cb87")
+        self.assertEqual(exercise_file.checksum, "f4689243ba9f9b5e1abdc874d2d7527d")
 
     def test_unsupported_question_type(self):
         """Test that unsupported question types raise appropriate errors"""

contentcuration/contentcuration/tests/viewsets/test_assessmentitem.py

@@ -25,9 +25,12 @@
     "</qti-response-declaration>",
     '<qti-choice-interaction response-identifier="RESPONSE" max-choices="1" '
     'min-choices="0" orientation="vertical"><qti-prompt>Select the correct answer. '
-    '<img src="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.png" '
-    'srcset="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.png 1x, cccccccccccccccccccccccccccccccc.png 2x" '
-    'alt="diagram" /><object data="dddddddddddddddddddddddddddddddd.pdf" '
+    # srcset belongs on <source>, not <img> — QTI 3.0's ImgDType has no such attribute.
+    "<picture>"
+    '<source srcset="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.png 1x, cccccccccccccccccccccccccccccccc.png 2x" />'
+    '<img src="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.png" alt="diagram" />'
+    "</picture>"
+    '<object data="dddddddddddddddddddddddddddddddd.pdf" '
     'type="application/pdf"></object></qti-prompt>'
     '<qti-simple-choice identifier="choice_0" show-hide="show" fixed="false">Option A</qti-simple-choice>'
     '<qti-simple-choice identifier="choice_1" show-hide="show" fixed="false">'

contentcuration/contentcuration/utils/assessment/qti/assessment_item.py

@@ -282,7 +282,7 @@ class AssessmentItem(QTIBase):
     label: Optional[str] = None
     adaptive: bool = False
     time_dependent: Optional[bool] = None
-    language: BCP47Language
+    xml__lang: BCP47Language
     tool_name: str = "kolibri"
     tool_version: str = "0.1"
 

contentcuration/contentcuration/utils/assessment/qti/convert.py

@@ -244,7 +244,7 @@ def build_perseus_custom_interaction_item(
     item = AssessmentItem(
         identifier=identifier,
         title=title,
-        language=language,
+        xml__lang=language,
         adaptive=False,
         time_dependent=False,
         response_declaration=[
@@ -327,7 +327,7 @@ def convert_legacy_assessment_item_to_qti(
     qti_item = AssessmentItem(
         identifier=qti_item_id,
         title=item.title,
-        language=item.language,
+        xml__lang=item.language,
         adaptive=False,
         time_dependent=False,
         response_declaration=[response_declaration],

contentcuration/contentcuration/utils/assessment/qti/schema/README.md

@@ -14,6 +14,10 @@ XSD files backing `contentcuration.utils.assessment.qti.validation`. Source: QTI
   SSML markup for text-to-speech hints).
   Source: https://purl.imsglobal.org/spec/ssml/v1p1/schema/xsd/
 
+`validation.py` also runs the Schematron rules `imsqti_itemv3p0p1_v1p0.xsd` carries inline
+in `xs:appinfo` — without them the XSD's `extensionAnyTypeLax.Attr` wildcard admits any
+attribute. Do not strip `xs:appinfo`.
+
 All `schemaLocation` attributes that originally pointed at `https://purl.imsglobal.org/...`
 have been rewritten to local relative filenames so the schema compiles with no network
 access at runtime — required since bulk publish and ricecooker upload validate many items