diff --git a/src/ssn/verify/verifyPatchmanifest.ts b/src/ssn/verify/verifyPatchmanifest.ts
index dab27b5..8ef98a0 100644
--- a/src/ssn/verify/verifyPatchmanifest.ts
+++ b/src/ssn/verify/verifyPatchmanifest.ts
@@ -124,22 +124,30 @@ export default function verifyPatchmanifest(manifestFile: xmlJs.Element, product
     }
     //<From>289</From>
     const From = ReleaseUpdatePath.elements[0];
-    if (From.type !== 'element' || From.name !== 'From' || From.attributes !== undefined || From.elements === undefined || From.elements.length !== 1 || From.elements[0].type !== 'text' || typeof From.elements[0].text !== 'string' || String(From.elements[0].text).match(/^(-1|0|[1-9][0-9]*)$/) === null) {
+    if (From.type !== 'element' || From.name !== 'From' || From.attributes !== undefined || From.elements === undefined || From.elements.length !== 1 || From.elements[0].type !== 'text' || typeof From.elements[0].text !== 'string') {
       throw new Error('Expected From element.');
     }
+    const fromNum = From.elements[0].text;
+    if (String(fromNum).match(/^(-1|0|[1-9][0-9]*)$/) === null) {
+      throw new Error(`Expected From element to be a number but it was ${fromNum}.`);
+    }
     //<To>285</To>
     const To = ReleaseUpdatePath.elements[1];
-    if (To.type !== 'element' || To.name !== 'To' || To.attributes !== undefined || To.elements === undefined || To.elements.length !== 1 || To.elements[0].type !== 'text' || typeof To.elements[0].text !== 'string' || String(To.elements[0].text).match(/^(0|[1-9][0-9]*)$/) === null) {
+    if (To.type !== 'element' || To.name !== 'To' || To.attributes !== undefined || To.elements === undefined || To.elements.length !== 1 || To.elements[0].type !== 'text' || typeof To.elements[0].text !== 'string') {
       throw new Error('Expected To element.');
     }
+    const toNum = To.elements[0].text;
+    if (String(toNum).match(/^(0|[1-9][0-9]*)$/) === null) {
+      throw new Error(`Expected To element to be a number but it was ${toNum}.`);
+    }
     //TODO: check if From and To are valid relations
     //<ExtraData>
     const ExtraData = ReleaseUpdatePath.elements[2];
-    if (ExtraData.type !== 'element' || ExtraData.name !== 'ExtraData') {
-      throw new Error(`Expected ExtraData element in patch ${From.elements[0].text}to${To.elements[0].text}.`);
+    if (ExtraData.type !== 'element' || ExtraData.name !== 'ExtraData' || ExtraData.attributes !== undefined) {
+      throw new Error(`Expected ExtraData element in patch ${fromNum}to${toNum}.`);
     }
-    if (ExtraData.attributes !== undefined || ExtraData.elements === undefined) {
-      throw new Error(`Expected ExtraData element with no attributes but some children in patch ${From.elements[0].text}to${To.elements[0].text}.`);
+    if (ExtraData.elements === undefined || (product === 'assets_swtor_fr_fr' && fromNum === '132' && toNum === '130')) {
+      throw new Error(`Expected ExtraData element with children in patch ${fromNum}to${toNum}.`);
     }
     for (let j = 0, jl = ExtraData.elements.length; j < jl; j += 1) {
       //<ExtraDataItem>
@@ -152,12 +160,35 @@ export default function verifyPatchmanifest(manifestFile: xmlJs.Element, product
       if (Key.type !== 'element' || Key.name !== 'Key' || Key.attributes !== undefined || Key.elements === undefined || Key.elements.length !== 1 || Key.elements[0].type !== 'text') {
         throw new Error('Expected Key element.');
       }
+      const keyName = String(Key.elements[0].text);
+      if (!['SSN_VERSION', 'MetafileUrl', 'ConfigurationUrl'].includes(keyName)) {
+        throw new Error(`Expected valid Key in patch ${fromNum}to${toNum} but "${keyName}" is not a valid key.`);
+      }
       //<Value>http://cdn-patch.swtor.com/patch/assets_swtor_de_de/assets_swtor_de_de_289to285.solidpkg</Value>
       const Value = ExtraDataItem.elements[1];
       if (Value.type !== 'element' || Value.name !== 'Value' || Value.attributes !== undefined || Value.elements === undefined || Value.elements.length !== 1 || Value.elements[0].type !== 'text') {
         throw new Error('Expected Value element.');
       }
       //TODO: parse Key and Value
+      const valueName = String(Value.elements[0].text);
+      switch (keyName) {
+        case 'SSN_VERSION':
+          if (!valueName.match(/^[0-9](\.[0-9])+$/)) {
+            throw new Error(`Expected valid Value for Key "SSN_VERSION" in patch ${fromNum}to${toNum} but it was "${valueName}".`);
+          }
+          break;
+        case 'MetafileUrl':
+          if (valueName !== `http://cdn-patch.swtor.com/patch/${product}/${product}_${fromNum}to${toNum}.solidpkg`) {
+            throw new Error(`Expected valid Value for Key "MetafileUrl" in patch ${fromNum}to${toNum} but it was "${valueName}".`);
+          }
+          break;
+        case 'ConfigurationUrl':
+          if (valueName !== '{AppContentUrl}download.solidconfig') {
+            throw new Error(`Expected valid Value for Key "ConfigurationUrl" in patch ${fromNum}to${toNum} but it was "${valueName}".`);
+          }
+          break;
+        default: //do nothing
+      }
     }
   }
 }