diff --git a/dev/js/src/match/corpusByMatch.js b/dev/js/src/match/corpusByMatch.js
index 1c0bead..59038a0 100644
--- a/dev/js/src/match/corpusByMatch.js
+++ b/dev/js/src/match/corpusByMatch.js
@@ -1,6 +1,6 @@
 define(['vc/fragment', 'util'], function (vcFragmentClass) {
   "use strict";
-
+  
   return {
     /**
      * Constructor
@@ -11,6 +11,8 @@
 
     // Initialize corpusByMatch
     _init : function (meta) {
+
+      // Meta is an element <dl />
       if (meta === undefined) {
         throw new Error('Missing parameters');
       }
@@ -24,11 +26,73 @@
       // Remember the meta table
       this._meta = meta;
 
+      this._meta.addEventListener(
+        "click", this.clickOnMeta.bind(this), false
+      );
+
       this._fragment = vcFragmentClass.create();
 
       return this;
     },
 
+    clickOnMeta : function (e) {
+      e.stopPropagation();
+      if (e.target === e.currentTarget) {
+        return;
+      };
+
+      // Get event target
+      let target = e.target;
+
+      let key, value, type;
+
+      // Meta information is a single value
+      if (target.tagName === 'DD') {
+        type = target.getAttribute("data-type");
+        key  = target.previousSibling.innerText;
+        value = target.innerText;
+      }
+
+      // Meta information is in a list
+      else if (target.tagName === 'DIV') {
+        type = target.parentNode.getAttribute("data-type");
+        key = target.parentNode.previousSibling.innerText;
+        value = target.innerText;
+      };
+
+      // Ignore stored types
+      if (type === "type:store")
+        return;
+
+      // Add or remove the constraint to the fragment
+      if (key && value) {
+        if (target.classList.contains("chosen")) {
+          target.classList.remove("chosen");
+          this._fragment.remove(key, value);
+        }
+        else {
+          target.classList.add("chosen");
+          this._fragment.add(key, value);
+        };
+
+        // Check if the fragment is empty
+        // If empty - hide!
+        if (!this._fragment.isEmpty()) {
+          this._meta.parentNode.insertBefore(
+            this._fragment.element(),
+            this._meta.nextSibling
+          );
+        }
+
+        // Otherwise show!
+        else {
+          this._meta.parentNode.removeChild(
+            this._fragment.element()
+          );
+        };
+      }
+    },
+
     // Stringify annotation
     toString : function () {
       return '';
diff --git a/dev/js/src/match/meta.js b/dev/js/src/match/meta.js
index d4e481e..e273a39 100644
--- a/dev/js/src/match/meta.js
+++ b/dev/js/src/match/meta.js
@@ -81,7 +81,8 @@
           dt.setAttribute("title", k);
           
           let metaDescr = field["value"];
-          metaDD =  metaL.addE('dd');
+          metaDD = metaL.addE('dd');
+          metaDD.setAttribute('data-type', field["type"]);
           
           if(metaDescr instanceof Array){
         	  metaDD.classList.add("metakeyvalues");  
diff --git a/dev/js/src/vc/fragment.js b/dev/js/src/vc/fragment.js
index 9b87ee2..a623549 100644
--- a/dev/js/src/vc/fragment.js
+++ b/dev/js/src/vc/fragment.js
@@ -9,6 +9,9 @@
 define(['util'], function () {
   "use strict";
 
+  const loc = KorAP.Locale;
+  loc.NEW_CONSTRAINT = loc.NEW_CONSTRAINT || 'New Constraint';
+  
   // Create a VC doc
   function _doc (op) {
     var doc = document.createElement('div');
@@ -91,8 +94,14 @@
         return this._element;
       };
 
+      // Initialize element
       this._element = document.createElement('div');
       this._element.classList.add('vc', 'fragment');
+
+      // Prepend info text
+      this._element.addE('span').addT(loc.NEW_CONSTRAINT + ':');
+      this._frag = this._element.addE('div');
+      
       return this._element;
     },
 
@@ -125,7 +134,8 @@
         root = _doc(this._operands[0]);
       };
 
-      const e = this.element();
+      this.element();
+      const e = this._frag;
       if (l === 0) {
         _removeChildren(e);
       }