diff --git a/README.md b/README.md
index 24d019d..7563b7d 100644
--- a/README.md
+++ b/README.md
@@ -16,10 +16,10 @@ FlexSearch v0.8: [Overview and Migration Guide](doc/0.8.0.md)
 <a href="#installation">Basic Start</a> &ensp;&bull;&ensp; 
 <a href="#api">API Reference</a> &ensp;&bull;&ensp;
 <a href="doc/encoder.md">Encoder</a> &ensp;&bull;&ensp;
-<a href="doc/custom-builds.md">Document Search</a> &ensp;&bull;&ensp;
+<a href="doc/document-search.md">Document Search</a> &ensp;&bull;&ensp;
 <a href="doc/persistent.md">Persistent Indexes</a> &ensp;&bull;&ensp;
 <a href="doc/worker.md">Using Worker</a> &ensp;&bull;&ensp;
-<a href="doc/document-search.md">Tag Search</a> &ensp;&bull;&ensp;
+<a href="doc/document-search#tag-search">Tag Search</a> &ensp;&bull;&ensp;
 <a href="doc/resolver.md">Resolver</a> &ensp;&bull;&ensp;
 <a href="doc/customization.md">Customization</a> &ensp;&bull;&ensp;
 <a href="CHANGELOG.md">Changelog</a>
@@ -102,80 +102,80 @@ The **_dist_** folder are located in: `node_modules/flexsearch/dist/`
     </tr>
     <tr>
         <td>flexsearch.bundle.debug.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.bundle.debug.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.debug.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.bundle.debug.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.debug.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.bundle.min.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.bundle.min.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.min.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.bundle.min.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.min.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.bundle.module.debug.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.bundle.module.debug.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.debug.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.bundle.module.debug.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.debug.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.bundle.module.min.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.bundle.module.min.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.bundle.module.min.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.es5.debug.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.es5.debug.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.es5.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.es5.debug.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.es5.debug.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.es5.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.es5.debug.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.es5.min.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.es5.min.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.es5.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.es5.min.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.es5.min.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.es5.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.es5.min.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.light.debug.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.light.debug.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.debug.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.light.debug.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.debug.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.light.min.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.light.min.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.min.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.light.min.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.min.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.light.module.debug.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.light.module.debug.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.module.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.module.debug.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.light.module.debug.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.module.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.module.debug.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.light.module.min.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.light.module.min.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.module.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.module.min.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.light.module.min.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.module.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.module.min.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>Javascript Modules (ESM)</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/module/" target="_blank">Download</a></td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module" target="_blank">https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/module/" target="_blank">Download</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module" target="_blank">https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>Javascript Modules Minified (ESM)</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/module-min/" target="_blank">Download</a></td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module-min" target="_blank">https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module-min</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/module-min/" target="_blank">Download</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module-min" target="_blank">https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module-min</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>Javascript Modules Debug (ESM)</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/module-debug/" target="_blank">Download</a></td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module-debug" target="_blank">https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module-debug</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/module-debug/" target="_blank">Download</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module-debug" target="_blank">https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module-debug</a></td>
     </tr>
     <tr></tr>
     <tr>
@@ -593,7 +593,7 @@ You can also load modules via CDN:
 
 ```html
 <script type="module">
-    import Index from "https://unpkg.com/flexsearch@v0.8-preview/dist/module/index.js";
+    import Index from "https://unpkg.com/flexsearch@0.8.0/dist/module/index.js";
     const index = new Index(/* ... */);
 </script>
 ```
diff --git a/demo/autocomplete.html b/demo/autocomplete.html
index a3030db..fc9daf2 100644
--- a/demo/autocomplete.html
+++ b/demo/autocomplete.html
@@ -76,8 +76,8 @@
 <div id="suggestions"></div>
 <script type="module">
 
-    import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
-    import data from "https://rawcdn.githack.com/nextapps-de/flexsearch/master/demo/data/movies.js";
+    import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js";
+    import data from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/demo/data/movies.js";
 
     (function(){
 
diff --git a/doc/0.8.0.md b/doc/0.8.0.md
index 3b3cd78..d5e05b4 100644
--- a/doc/0.8.0.md
+++ b/doc/0.8.0.md
@@ -1,7 +1,7 @@
 # FlexSearch v0.8 (Preview)
 
 ```bash
-npm install git+https://github.com/nextapps-de/flexsearch/tree/v0.8-preview
+npm install git+https://github.com/nextapps-de/flexsearch/tree/master
 ```
 
 ## What's New
@@ -1380,80 +1380,80 @@ The **_dist_** folder are located in: `node_modules/flexsearch/dist/`
     </tr>
     <tr>
         <td>flexsearch.bundle.debug.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.bundle.debug.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.debug.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.bundle.debug.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.debug.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.bundle.min.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.bundle.min.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.min.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.bundle.min.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.min.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.bundle.module.debug.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.bundle.module.debug.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.debug.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.bundle.module.debug.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.debug.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.bundle.module.min.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.bundle.module.min.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.bundle.module.min.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.bundle.module.min.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.es5.debug.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.es5.debug.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.es5.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.es5.debug.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.es5.debug.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.es5.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.es5.debug.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.es5.min.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.es5.min.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.es5.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.es5.min.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.es5.min.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.es5.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.es5.min.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.light.debug.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.light.debug.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.debug.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.light.debug.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.debug.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.light.min.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.light.min.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.min.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.light.min.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.min.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.light.module.debug.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.light.module.debug.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.module.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.module.debug.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.light.module.debug.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.module.debug.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.module.debug.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>flexsearch.light.module.min.js</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/flexsearch.light.module.min.js" target="_blank">Download</a></td>
-        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.module.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/v0.8-preview/dist/flexsearch.light.module.min.js</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/flexsearch.light.module.min.js" target="_blank">Download</a></td>
+        <td><a href="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.module.min.js" target="_blank">https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.module.min.js</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>Javascript Modules (ESM)</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/module/" target="_blank">Download</a></td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module" target="_blank">https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/module/" target="_blank">Download</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module" target="_blank">https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>Javascript Modules Minified (ESM)</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/module-min/" target="_blank">Download</a></td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module-min" target="_blank">https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module-min</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/module-min/" target="_blank">Download</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module-min" target="_blank">https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module-min</a></td>
     </tr>
     <tr></tr>
     <tr>
         <td>Javascript Modules Debug (ESM)</td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/raw/v0.8-preview/dist/module-debug/" target="_blank">Download</a></td>
-        <td><a href="https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module-debug" target="_blank">https://github.com/nextapps-de/flexsearch/tree/v0.8-preview/dist/module-debug</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/raw/0.8.0/dist/module-debug/" target="_blank">Download</a></td>
+        <td><a href="https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module-debug" target="_blank">https://github.com/nextapps-de/flexsearch/tree/0.8.0/dist/module-debug</a></td>
     </tr>
     <tr></tr>
     <tr>
@@ -1573,7 +1573,7 @@ You can also load modules via CDN:
 
 ```html
 <script type="module">
-    import Index from "https://unpkg.com/flexsearch@v0.8-preview/dist/module/index.js";
+    import Index from "https://unpkg.com/flexsearch@0.8.0/dist/module/index.js";
     const index = new Index(/* ... */);
 </script>
 ```
diff --git a/doc/document-search.md b/doc/document-search.md
index 2b40ff6..5160a72 100644
--- a/doc/document-search.md
+++ b/doc/document-search.md
@@ -37,6 +37,8 @@ By passing the search option `merge: true` the result set will be merged into (g
 }]
 ```
 
+<a name="tag-search"></a>
+
 ## Multi-Tag-Search
 
 Assume this document schema (a dataset from IMDB):
diff --git a/example/browser-legacy/basic-persistent/index.html b/example/browser-legacy/basic-persistent/index.html
index 2b0c0a4..1b8bb51 100644
--- a/example/browser-legacy/basic-persistent/index.html
+++ b/example/browser-legacy/basic-persistent/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-basic-persistent</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/basic-resolver/index.html b/example/browser-legacy/basic-resolver/index.html
index a68f3c6..b642d95 100644
--- a/example/browser-legacy/basic-resolver/index.html
+++ b/example/browser-legacy/basic-resolver/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-basic-resolver</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.min.js"></script>
 <script>
 
   // create a simple index which can store id-content-pairs
diff --git a/example/browser-legacy/basic-suggestion/index.html b/example/browser-legacy/basic-suggestion/index.html
index 6b856b6..7aeb838 100644
--- a/example/browser-legacy/basic-suggestion/index.html
+++ b/example/browser-legacy/basic-suggestion/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-basic-suggestion</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.light.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.min.js"></script>
 <script>
 
   // create a simple index which can store id-content-pairs
diff --git a/example/browser-legacy/basic-worker/index.html b/example/browser-legacy/basic-worker/index.html
index 2ab7343..b1f9aeb 100644
--- a/example/browser-legacy/basic-worker/index.html
+++ b/example/browser-legacy/basic-worker/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-basic-worker</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/basic/index.html b/example/browser-legacy/basic/index.html
index e1bf9d0..5c2a621 100644
--- a/example/browser-legacy/basic/index.html
+++ b/example/browser-legacy/basic/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-basic</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.light.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.min.js"></script>
 <script>
 
   // create a simple index which can store id-content-pairs
diff --git a/example/browser-legacy/document-highlighting/index.html b/example/browser-legacy/document-highlighting/index.html
index 60ba950..8434fa3 100644
--- a/example/browser-legacy/document-highlighting/index.html
+++ b/example/browser-legacy/document-highlighting/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-document-highlighting</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.compact.min.js"></script>
 <script type="module">
 
   // some test data
diff --git a/example/browser-legacy/document-persistent/index.html b/example/browser-legacy/document-persistent/index.html
index 1b6bb00..92ae3da 100644
--- a/example/browser-legacy/document-persistent/index.html
+++ b/example/browser-legacy/document-persistent/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-document-persistent</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/document-worker/index.html b/example/browser-legacy/document-worker/index.html
index 853b1ee..bc948ff 100644
--- a/example/browser-legacy/document-worker/index.html
+++ b/example/browser-legacy/document-worker/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-document-worker</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.min.js"></script>
 <script>
 (async function(){
 
diff --git a/example/browser-legacy/document/index.html b/example/browser-legacy/document/index.html
index 1ae1d53..8427727 100644
--- a/example/browser-legacy/document/index.html
+++ b/example/browser-legacy/document/index.html
@@ -6,7 +6,7 @@
   <title>Example: browser-legacy-document</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.compact.min.js"></script>
 <script>
 
   // some test data
diff --git a/example/browser-legacy/language-pack/index.html b/example/browser-legacy/language-pack/index.html
index 097df6a..2c05bb4 100644
--- a/example/browser-legacy/language-pack/index.html
+++ b/example/browser-legacy/language-pack/index.html
@@ -6,9 +6,9 @@
   <title>Example: browser-legacy-language-packs</title>
 </head>
 <body style="white-space: pre">
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.compact.min.js"></script>
 <!-- Load language pack after loading the library -->
-<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/lang/en.min.js"></script>
+<script src="https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/lang/en.min.js"></script>
 <script>
 
   const encoder = new FlexSearch.Encoder(
diff --git a/example/browser-module/basic-persistent/index.html b/example/browser-module/basic-persistent/index.html
index a02a7fd..f60674d 100644
--- a/example/browser-module/basic-persistent/index.html
+++ b/example/browser-module/basic-persistent/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
+  import { Index, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js";
 
   // create DB instance with namespace
   const db = new IndexedDB("my-store");
diff --git a/example/browser-module/basic-resolver/index.html b/example/browser-module/basic-resolver/index.html
index 913f975..a07ef6e 100644
--- a/example/browser-module/basic-resolver/index.html
+++ b/example/browser-module/basic-resolver/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index, Resolver } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
+  import { Index, Resolver } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js";
 
   // create a simple index which can store id-content-pairs
   const index = new Index({
diff --git a/example/browser-module/basic-suggestion/index.html b/example/browser-module/basic-suggestion/index.html
index 0290d87..1a29462 100644
--- a/example/browser-module/basic-suggestion/index.html
+++ b/example/browser-module/basic-suggestion/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.light.module.min.js";
+  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.module.min.js";
 
   // create a simple index which can store id-content-pairs
   const index = new Index({
diff --git a/example/browser-module/basic-worker-extern-config/config.js b/example/browser-module/basic-worker-extern-config/config.js
index 973e2b9..814d178 100644
--- a/example/browser-module/basic-worker-extern-config/config.js
+++ b/example/browser-module/basic-worker-extern-config/config.js
@@ -1,4 +1,4 @@
-import { Encoder } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
+import { Encoder } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js";
 
 export default {
     tokenize: "forward",
diff --git a/example/browser-module/basic/index.html b/example/browser-module/basic/index.html
index 4f6705c..2eeb8af 100644
--- a/example/browser-module/basic/index.html
+++ b/example/browser-module/basic/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.light.module.min.js";
+  import { Index } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.light.module.min.js";
 
   // create a simple index which can store id-content-pairs
   const index = new Index({
diff --git a/example/browser-module/document-highlighting/index.html b/example/browser-module/document-highlighting/index.html
index b6dbe9f..8e4159d 100644
--- a/example/browser-module/document-highlighting/index.html
+++ b/example/browser-module/document-highlighting/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.module.min.js";
+  import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.compact.module.min.js";
 
   // some test data
   const data = [{
diff --git a/example/browser-module/document-persistent/index.html b/example/browser-module/document-persistent/index.html
index 5b2da35..9e45a22 100644
--- a/example/browser-module/document-persistent/index.html
+++ b/example/browser-module/document-persistent/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Document, Charset, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
+  import { Document, Charset, IndexedDB } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js";
 
   // some test data
   const data = [{
diff --git a/example/browser-module/document-worker-extern-config/config.originalTitle.js b/example/browser-module/document-worker-extern-config/config.originalTitle.js
index 437c543..9d96f4f 100644
--- a/example/browser-module/document-worker-extern-config/config.originalTitle.js
+++ b/example/browser-module/document-worker-extern-config/config.originalTitle.js
@@ -1,5 +1,5 @@
-import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
-import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/module/lang/en.js";
+import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js";
+import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/module/lang/en.js";
 
 export default {
     tokenize: "forward",
diff --git a/example/browser-module/document-worker-extern-config/config.primaryTitle.js b/example/browser-module/document-worker-extern-config/config.primaryTitle.js
index 437c543..9d96f4f 100644
--- a/example/browser-module/document-worker-extern-config/config.primaryTitle.js
+++ b/example/browser-module/document-worker-extern-config/config.primaryTitle.js
@@ -1,5 +1,5 @@
-import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.bundle.module.min.js";
-import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/module/lang/en.js";
+import { Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.bundle.module.min.js";
+import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/module/lang/en.js";
 
 export default {
     tokenize: "forward",
diff --git a/example/browser-module/document/index.html b/example/browser-module/document/index.html
index 5c6c621..bd38202 100644
--- a/example/browser-module/document/index.html
+++ b/example/browser-module/document/index.html
@@ -8,7 +8,7 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.module.min.js";
+  import { Document, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.compact.module.min.js";
 
   // some test data
   const data = [{
diff --git a/example/browser-module/language-pack/index.html b/example/browser-module/language-pack/index.html
index 781a0f8..0a200bb 100644
--- a/example/browser-module/language-pack/index.html
+++ b/example/browser-module/language-pack/index.html
@@ -8,8 +8,8 @@
 <body style="white-space: pre">
 <script type="module">
 
-  import { Index, Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/flexsearch.compact.module.min.js";
-  import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/a006c24bbb6f77ad491fa81c1c30481efa2431de/dist/module/lang/en.js";
+  import { Index, Encoder, Charset } from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/flexsearch.compact.module.min.js";
+  import EnglishPreset from "https://rawcdn.githack.com/nextapps-de/flexsearch/0.8.0/dist/module/lang/en.js";
 
   const encoder = new Encoder(
     Charset.LatinSimple,