diff --git a/package-lock.json b/package-lock.json
index 88c75b046509..a7da6f41362d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,6 +28,36 @@
         "node": ">=10"
       }
     },
+    "../reffy": {
+      "version": "10.0.4",
+      "extraneous": true,
+      "license": "MIT",
+      "dependencies": {
+        "abortcontroller-polyfill": "1.7.3",
+        "ajv": "8.11.0",
+        "ajv-formats": "2.1.1",
+        "commander": "9.4.0",
+        "fetch-filecache-for-crawling": "4.1.0",
+        "puppeteer": "18.0.5",
+        "semver": "^7.3.5",
+        "web-specs": "2.25.0",
+        "webidl2": "24.2.2"
+      },
+      "bin": {
+        "reffy": "reffy.js"
+      },
+      "devDependencies": {
+        "chai": "4.3.6",
+        "mocha": "10.0.0",
+        "nock": "13.2.9",
+        "respec": "32.2.4",
+        "respec-hljs": "2.1.1",
+        "rollup": "2.79.1"
+      },
+      "engines": {
+        "node": ">=14"
+      }
+    },
     "node_modules/@actions/core": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/@actions/core/-/core-1.9.1.tgz",
@@ -910,7 +940,7 @@
     "node_modules/filename-reserved-regex": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/filename-reserved-regex/-/filename-reserved-regex-2.0.0.tgz",
-      "integrity": "sha1-q/c9+rc10EVECr/qLZHzieu/oik=",
+      "integrity": "sha512-lc1bnsSr4L4Bdif8Xb/qrtokGbq5zlsms/CYH8PP+WtCkGNF65DPiQY8vG3SakEdRn8Dlnm+gW/qWKKjS5sZzQ==",
       "dev": true,
       "engines": {
         "node": ">=4"
@@ -1803,7 +1833,7 @@
     "node_modules/strip-outer/node_modules/escape-string-regexp": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
-      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
+      "integrity": "sha512-vbRorB5FUQWvla16U8R/qgaFIya2qGzwDrNmCZuYKrbdSUMG6I1ZCGQRefkRVhuOkIGVne7BQ35DSfo1qvJqFg==",
       "dev": true,
       "engines": {
         "node": ">=0.8.0"
@@ -1879,7 +1909,7 @@
     "node_modules/trim-repeated": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/trim-repeated/-/trim-repeated-1.0.0.tgz",
-      "integrity": "sha1-42RqLqTokTEr9+rObPsFOAvAHCE=",
+      "integrity": "sha512-pkonvlKk8/ZuR0D5tLW8ljt5I8kmxp2XKymhepUeOdCEfKpZaktSArkLHZt76OB1ZvO9bssUsDty4SWhLvZpLg==",
       "dev": true,
       "dependencies": {
         "escape-string-regexp": "^1.0.2"
@@ -1891,7 +1921,7 @@
     "node_modules/trim-repeated/node_modules/escape-string-regexp": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
-      "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
+      "integrity": "sha512-vbRorB5FUQWvla16U8R/qgaFIya2qGzwDrNmCZuYKrbdSUMG6I1ZCGQRefkRVhuOkIGVne7BQ35DSfo1qvJqFg==",
       "dev": true,
       "engines": {
         "node": ">=0.8.0"
@@ -2964,7 +2994,7 @@
     "filename-reserved-regex": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/filename-reserved-regex/-/filename-reserved-regex-2.0.0.tgz",
-      "integrity": "sha1-q/c9+rc10EVECr/qLZHzieu/oik=",
+      "integrity": "sha512-lc1bnsSr4L4Bdif8Xb/qrtokGbq5zlsms/CYH8PP+WtCkGNF65DPiQY8vG3SakEdRn8Dlnm+gW/qWKKjS5sZzQ==",
       "dev": true
     },
     "filenamify": {
@@ -3594,7 +3624,7 @@
         "escape-string-regexp": {
           "version": "1.0.5",
           "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
-          "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
+          "integrity": "sha512-vbRorB5FUQWvla16U8R/qgaFIya2qGzwDrNmCZuYKrbdSUMG6I1ZCGQRefkRVhuOkIGVne7BQ35DSfo1qvJqFg==",
           "dev": true
         }
       }
@@ -3657,7 +3687,7 @@
     "trim-repeated": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/trim-repeated/-/trim-repeated-1.0.0.tgz",
-      "integrity": "sha1-42RqLqTokTEr9+rObPsFOAvAHCE=",
+      "integrity": "sha512-pkonvlKk8/ZuR0D5tLW8ljt5I8kmxp2XKymhepUeOdCEfKpZaktSArkLHZt76OB1ZvO9bssUsDty4SWhLvZpLg==",
       "dev": true,
       "requires": {
         "escape-string-regexp": "^1.0.2"
@@ -3666,7 +3696,7 @@
         "escape-string-regexp": {
           "version": "1.0.5",
           "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
-          "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=",
+          "integrity": "sha512-vbRorB5FUQWvla16U8R/qgaFIya2qGzwDrNmCZuYKrbdSUMG6I1ZCGQRefkRVhuOkIGVne7BQ35DSfo1qvJqFg==",
           "dev": true
         }
       }
diff --git a/test/schemas.js b/test/schemas.js
new file mode 100644
index 000000000000..57a0f92dfe12
--- /dev/null
+++ b/test/schemas.js
@@ -0,0 +1,41 @@
+/**
+ * Test individual elements extracts.
+ * 
+ * The tests run against the curated view of the extracts.
+ */
+
+const fs = require('fs');
+const path = require('path');
+const assert = require('assert').strict;
+const { getSchemaValidationFunction } = require('reffy');
+
+const curatedFolder = path.join(__dirname, '..', 'curated');
+const files = fs.readdirSync(curatedFolder);
+for (const file of files) {
+  const validate = getSchemaValidationFunction(file);
+  if (file.endsWith('.json')) {
+    describe(`The ${file} file`, function () {
+      it('contains valid data', function () {
+        const data = require(path.join(curatedFolder, file));
+        const errors = validate(data);
+        assert.strictEqual(errors, null, JSON.stringify(errors, null, 2));
+      });
+    });
+  }
+  else {
+    describe(`The ${file} folder`, function () {
+      const extractType = file;
+      const folder = path.join(curatedFolder, extractType);
+      const files = fs.readdirSync(folder);
+      for (const file of files) {
+        if (file.endsWith('.json')) {
+          it(`contains valid ${extractType} data in ${file}`, () => {
+            const data = require(path.join(folder, file));
+            const errors = validate(data);
+            assert.strictEqual(errors, null, JSON.stringify(errors, null, 2));
+          });
+        }
+      }
+    });
+  }
+}