diff --git a/data/model/questionnaire/questionnaire-question.mjson b/data/model/questionnaire/questionnaire-question.mjson
index ce7e78a..81b0ed9 100644
--- a/data/model/questionnaire/questionnaire-question.mjson
+++ b/data/model/questionnaire/questionnaire-question.mjson
@@ -11,7 +11,8 @@
                 {"@": "displayLogicExpression"},
                 {"@": "maximumNumberOfAnswer"},
                 {"@": "possibleAnswers"},
-                {"@": "respondentQuestionnaireAnswers"}
+                {"@": "respondentQuestionnaireAnswers"},
+                {"@": "notes"}
             ],
             "objectDescriptorModule": {
                 "%":"./questionnaire-question.mjson"
diff --git a/data/model/questionnaire/variable.mjson b/data/model/questionnaire/variable.mjson
index e8b90d9..9e1cfc5 100644
--- a/data/model/questionnaire/variable.mjson
+++ b/data/model/questionnaire/variable.mjson
@@ -23,9 +23,6 @@
     "variable": {
         "object": "./variable"
     },
-    "variablePrototype": {
-        "object": "./variable"
-    },
     "modVariableObjectDescriptor": {
         "object": "mod/data/model/variable.mjson"
     },
diff --git a/mjson-validation-report.md b/mjson-validation-report.md
new file mode 100644
index 0000000..c12c3bb
--- /dev/null
+++ b/mjson-validation-report.md
@@ -0,0 +1,151 @@
+# MJSON Configuration Files Validation Report
+
+**Directory:** `data/model/questionnaire`
+**Date:** 2026-01-08
+**Total Files Processed:** 8
+
+---
+
+## Inventory
+
+The following MJSON files were discovered and analyzed:
+
+1. `answer.mjson`
+2. `question.mjson`
+3. `questionnaire.mjson`
+4. `questionnaire-question.mjson`
+5. `respondent-questionnaire.mjson`
+6. `respondent-questionnaire-answer.mjson`
+7. `respondent-questionnaire-variable-value.mjson`
+8. `variable.mjson`
+
+---
+
+## Issues Report
+
+### 1. answer.mjson
+**Status:** ✅ **Valid**
+
+- **Syntax:** Valid JSON
+- **Inheritance:** Properly defined (`parent: {"@": "objectDescriptor"}` → `mod/data/model/data-object.mjson`)
+- **Property Descriptors:** All 15 properties have matching definitions
+- **References:** All internal references are valid
+
+---
+
+### 2. question.mjson
+**Status:** ✅ **Valid**
+
+- **Syntax:** Valid JSON
+- **Inheritance:** Properly defined (`parent: {"@": "objectDescriptor"}` → `mod/data/model/data-object.mjson`)
+- **Property Descriptors:** All 7 properties have matching definitions
+- **References:** All internal references are valid
+
+---
+
+### 3. questionnaire.mjson
+**Status:** ✅ **Valid**
+
+- **Syntax:** Valid JSON
+- **Inheritance:** Properly defined (`parent: {"@": "objectDescriptor"}` → `mod/data/model/data-object.mjson`)
+- **Property Descriptors:** All 11 properties have matching definitions
+- **References:** All internal references are valid
+
+---
+
+### 4. questionnaire-question.mjson
+**Status:** ⚠️ **Issue Detected**
+
+- **Syntax:** Valid JSON
+- **Inheritance:** Properly defined (`parent: {"@": "objectDescriptor"}` → `mod/data/model/data-object.mjson`)
+- **Property Descriptors:** All 8 declared properties have matching definitions
+
+**Issue:** Orphaned Property Definition
+- **Lines 123-131:** The property `"notes"` is fully defined but **NOT included** in the `propertyDescriptors` array
+- **Impact:** This property exists in the schema but is not exposed/registered, making it effectively unusable
+- **Recommendation:** Either add `{"@": "notes"}` to the `propertyDescriptors` array or remove the definition if not needed
+
+```json
+// Missing from propertyDescriptors array:
+{"@": "notes"}
+```
+
+---
+
+### 5. respondent-questionnaire.mjson
+**Status:** ✅ **Valid**
+
+- **Syntax:** Valid JSON
+- **Inheritance:** Properly defined (`parent: {"@": "objectDescriptor"}` → `mod/data/model/data-object.mjson`)
+- **Property Descriptors:** All 9 properties have matching definitions
+- **References:** All internal references are valid
+
+---
+
+### 6. respondent-questionnaire-answer.mjson
+**Status:** ✅ **Valid**
+
+- **Syntax:** Valid JSON
+- **Inheritance:** Properly defined (`parent: {"@": "objectDescriptor"}` → `mod/data/model/data-object.mjson`)
+- **Property Descriptors:** All 5 properties have matching definitions
+- **References:** All internal references are valid
+
+---
+
+### 7. respondent-questionnaire-variable-value.mjson
+**Status:** ✅ **Valid**
+
+- **Syntax:** Valid JSON
+- **Inheritance:** Properly defined (`parent: {"@": "objectDescriptor"}` → `mod/data/model/data-object.mjson`)
+- **Property Descriptors:** All 3 properties have matching definitions
+- **References:** All internal references are valid
+
+---
+
+### 8. variable.mjson
+**Status:** ⚠️ **Issue Detected**
+
+- **Syntax:** Valid JSON
+- **Inheritance:** Properly defined (`parent: {"@": "modVariableObjectDescriptor"}` → `mod/data/model/variable.mjson`)
+- **Property Descriptors:** All 3 properties have matching definitions
+
+**Issue:** Unused Definition
+- **Lines 26-28:** The key `"variablePrototype"` is defined with `"object": "./variable"` but is **never referenced** anywhere in the file
+- **Impact:** Dead code that clutters the configuration
+- **Recommendation:** Remove this unused definition or identify where it should be used
+
+```json
+// Unused definition that can be removed:
+"variablePrototype": {
+    "object": "./variable"
+}
+```
+
+**Note:** The file already has a `"variable"` key (lines 23-25) that serves the same purpose and is properly referenced by `root.values.object`.
+
+---
+
+## Summary
+
+| File | Status | Issues |
+|------|--------|--------|
+| answer.mjson | ✅ Valid | None |
+| question.mjson | ✅ Valid | None |
+| questionnaire.mjson | ✅ Valid | None |
+| questionnaire-question.mjson | ⚠️ Issue | Orphaned property definition (`notes`) |
+| respondent-questionnaire.mjson | ✅ Valid | None |
+| respondent-questionnaire-answer.mjson | ✅ Valid | None |
+| respondent-questionnaire-variable-value.mjson | ✅ Valid | None |
+| variable.mjson | ⚠️ Issue | Unused definition (`variablePrototype`) |
+
+**Total Issues Found:** 2
+
+---
+
+## Recommendations
+
+1. **questionnaire-question.mjson:** Add the `notes` property to the `propertyDescriptors` array to make it accessible, or remove the definition if it's not needed.
+
+2. **variable.mjson:** Remove the unused `variablePrototype` definition to clean up the configuration file.
+
+Both issues are non-critical but should be addressed to maintain clean, consistent MJSON configurations.