fix: update readme

Author: noraeb

packages/compas-open-scd/public/nsdoc/README.md

@@ -8,3 +8,10 @@ Directory containing fixed nsdoc for the 'Validation' plugin:
 Where `XX` represents the revision and release values.
 
 This directory should also contain a `manifest.json` file listing all available NSDOC files for dynamic discovery. If the manifest is not present, the system will fall back to pattern-based file discovery.
+
+## Fallback pattern discovery
+
+When manifest.json is not available, the service checks for files using these patterns:
+
+- Standards 7-2, 7-3, 7-4: `2007B5` to `2007B9` (stops at first found)
+- Standard 8-1: `2003A2` to `2003A9` (stops at first found)

packages/compas-open-scd/src/compas-services/CompasNSDocFileService.ts

@@ -122,29 +122,36 @@ async function getNsDocFilesFromManifest(): Promise<string[]> {
 
 // Discover NSDOC files using pattern-based approach (fallback)
 async function getNsDocFilesByPattern(): Promise<string[]> {
-  const standards = ['7-2', '7-3', '7-4', '8-1'];
-  const versions = ['2003A2', '2007B3', '2007B4', '2007B5'];
-
-  const potentialFiles: string[] = [];
-  for (const standard of standards) {
-    for (const version of versions) {
-      potentialFiles.push(`IEC_61850-${standard}_${version}-en.nsdoc`);
+  const discoveredFiles: string[] = [];
+
+  const standards2007 = ['7-2', '7-3', '7-4'];
+  for (const standard of standards2007) {
+    for (let release = 5; release <= 9; release++) {
+      const filename = `IEC_61850-${standard}_2007B${release}-en.nsdoc`;
+      try {
+        const response = await fetch(`/public/nsdoc/${filename}`);
+        if (response.ok) {
+          discoveredFiles.push(filename);
+          break;
+        }
+      } catch (e) {
+        // Continue to next version
+      }
     }
   }
 
-  const testPromises = potentialFiles.map(async filename => {
+  for (let release = 2; release <= 9; release++) {
+    const filename = `IEC_61850-8-1_2003A${release}-en.nsdoc`;
     try {
       const response = await fetch(`/public/nsdoc/${filename}`);
-      return response.ok ? filename : null;
+      if (response.ok) {
+        discoveredFiles.push(filename);
+        break;
+      }
     } catch (e) {
-      return null;
+      // Continue to next version
     }
-  });
-
-  const existingFiles = await Promise.all(testPromises);
-  const discoveredFiles = existingFiles.filter(
-    (filename): filename is string => filename !== null
-  );
+  }
 
   return discoveredFiles;
 }