diff --git a/dev/js/src/match/corpusByMatch.js b/dev/js/src/match/corpusByMatch.js
index cc2ae2f..4b8ec73 100644
--- a/dev/js/src/match/corpusByMatch.js
+++ b/dev/js/src/match/corpusByMatch.js
@@ -99,7 +99,7 @@
       if (target.tagName === 'DD') {
         type = target.getAttribute("data-type");
         key  = target.previousElementSibling.innerText;
-        value = target.innerText;
+        value = (type == "type:integer" ? Number(target.innerText) : target.innerText);
       }
 
       // Meta information is in a list
diff --git a/dev/js/src/vc.js b/dev/js/src/vc.js
index 2c068ee..9d91a62 100644
--- a/dev/js/src/vc.js
+++ b/dev/js/src/vc.js
@@ -74,6 +74,7 @@
   KorAP._validUnspecMatchRE = new RegExp(
     "^(?:eq|ne|contains(?:not)?|excludes)$");
   KorAP._validStringMatchRE = new RegExp("^(?:eq|ne)$");
+  KorAP._validIntegerMatchRE = new RegExp("^(?:[gl]?eq|ne)$");
   KorAP._validTextMatchRE = KorAP._validUnspecMatchRE;
   KorAP._validTextOnlyMatchRE = new RegExp(
     "^(?:contains(?:not)?|excludes)$");
@@ -111,6 +112,12 @@
     'regex' : menuClass.create([
       [ 'eq', null ],
       [ 'ne', null ]
+    ]),
+    'integer' : menuClass.create([
+      [ 'eq', null ],
+      [ 'ne', null ],
+      [ 'geq', null ],
+      [ 'leq', null ]
     ])
   };
 
diff --git a/dev/js/src/vc/doc.js b/dev/js/src/vc/doc.js
index 37b0e0b..d504642 100644
--- a/dev/js/src/vc/doc.js
+++ b/dev/js/src/vc/doc.js
@@ -7,9 +7,10 @@
   'vc/jsonld',
   'vc/rewritelist',
   'vc/stringval',
+  'vc/intval',
   'vc/docgroupref',
   'util'
-], function (jsonldClass, rewriteListClass, stringValClass, docGroupRefClass) {
+], function (jsonldClass, rewriteListClass, stringValClass, intValClass, docGroupRefClass) {
 
   /*
    * TODO:
@@ -219,8 +220,14 @@
         return;
       };
 
-      if (json["value"] === undefined ||
-          typeof json["value"] != 'string') {
+      if (json["value"] === undefined
+          ||
+          (typeof json["value"] != 'string'
+
+           && !(json["type"] != undefined &&
+                json["type"] == "type:integer" &&
+                typeof json["value"] == 'number')
+          )) {
         KorAP.log(805, "Value is invalid");
         return;
       };
@@ -305,6 +312,24 @@
           t.value(json["value"]);
         }
 
+        // Key is integer
+        else if (json["type"] == "type:integer") {
+          t.type("integer");
+
+          // Check match type
+          if (!KorAP._validIntegerMatchRE.test(t.matchop())) {
+            KorAP.log(802, errstr802);
+
+            // Rewrite method
+            t.matchop('eq');
+            rewrite = 'modification';
+          };
+
+          // Set string value
+          t.value(json["value"]);
+        }
+
+        
         // Key is a date
         else if (json["type"] === "type:date") {
           t.type("date");
@@ -450,6 +475,8 @@
             ||
             (t._type === 'text' && KorAP._validTextMatchRE.test(m))
             ||
+            (t._type === 'integer' && KorAP._validIntegerMatchRE.test(m))
+            ||
             (t._type === 'date' && KorAP._validDateMatchRE.test(m))
         ) {
           t._matchop = m;
@@ -557,32 +584,49 @@
 
         dp.input().focus();
       }
-
+   
       else {
-        const regex = this.type() === 'regex' ? true : false;
-        const str = stringValClass.create(this.value(), regex);
-        const strElem = str.element();
 
-        str.store = function (value, regex) {
-          that.value(value);
-          if (regex === true)
-            that.type('regex');
-          else
-            that.type('string');
+        let vcVal;
+        
+        if (this.type() === 'integer') {
+          vcVal = intValClass.create(this.value());
+
+          vcVal.store = function (value) {
+            that.value(value);
+            that.type('integer');
+            that._el.removeChild(
+              this._el
+            );
+            that.update();
+          };
+        }
+
+        else {
+          const regex = this.type() === 'regex' ? true : false;
+          vcVal = stringValClass.create(this.value(), regex);
+
+          vcVal.store = function (value, regex) {
+            that.value(value);
+            if (regex === true)
+              that.type('regex');
+            else
+              that.type('string');
           
-          that._el.removeChild(
-            this._el
-          );
-          that.update();
+            that._el.removeChild(
+              this._el
+            );
+            that.update();
+          };
         };
 
         // Insert element
         this._el.insertBefore(
-          strElem,
+          vcVal.element(),
           this._valueE
         );
 
-        str.focus();
+        vcVal.focus();
       };
     },
 
@@ -666,10 +710,10 @@
         string += '!~';
         break;
       case "geq":
-        string += 'since';
+        string += (this.type() == 'date') ? 'since' : '>=';
         break;
       case "leq":
-        string += 'until';
+        string += (this.type() == 'date') ? 'until' : '<=';
         break;
       default:
         string += (this.type() == 'date') ? 'in' : '=';
@@ -681,6 +725,7 @@
       // Add value
       switch (this.type()) {
       case "date":
+      case "integer":
         return string + this.value();
       case "regex":
         return string + '/' + this.value().escapeRegex() + '/';
diff --git a/dev/js/src/vc/fragment.js b/dev/js/src/vc/fragment.js
index 72bd80e..e5b03a0 100644
--- a/dev/js/src/vc/fragment.js
+++ b/dev/js/src/vc/fragment.js
@@ -115,7 +115,7 @@
           doc.key(item[0]);
           doc.matchop("eq");
           doc.value(item[1]);
-          doc.type(item[2] === "date" ? "date" : "string");
+          doc.type(item[2] === "date" ? "date" : (item[2] === "integer" ? "integer" : "string"));
           return doc;
         }
       );
diff --git a/dev/js/src/vc/intval.js b/dev/js/src/vc/intval.js
new file mode 100644
index 0000000..55a5829
--- /dev/null
+++ b/dev/js/src/vc/intval.js
@@ -0,0 +1,144 @@
+/**
+ * Add integer values to the virtual corpus
+ */
+"use strict";
+
+define(['util'], function () {
+
+  return {
+    /**
+     * Create new integer value helper.
+     */
+    create : function () {
+      const a = arguments;
+      let value = 0;
+
+      // Set value
+      if (a.length >= 1) {
+        if (a[0] !== undefined)
+          value = a[0];
+      };
+
+      return Object.create(this)._init(value);
+    },
+    
+
+    // Initialize the integer value
+    _init : function (value) {
+      this.value(value);
+      return this;
+    },
+
+    /**
+     * Get or set the integer value.
+     */
+    value : function (val) {
+      if (arguments.length === 1) {
+
+        if (typeof val != "number")
+          val = parseInt(val);
+
+        if (isNaN(val))
+          val = 0;
+        
+        this._value = val;
+        this._update();
+      };
+      return this._value;
+    },
+
+
+    // Update dom element
+    _update : function () {
+      if (this._el === undefined)
+        return;
+      
+      this._value = this._input.value;
+    },
+    
+
+    /**
+     * Store the integer value.
+     * This method should be overwritten.
+     * The method receives the value.
+     */
+    store : function (v) {},
+
+
+    /**
+     * Put focus on element
+     */
+    focus : function () {
+      this._el.children[0].focus();
+    },
+
+
+    /**
+     * Get the associated dom element.
+     */
+    element : function () {
+      if (this._el !== undefined)
+        return this._el;
+
+      // Create element
+      const e = this._el = document.createElement('div');
+      e.setAttribute('tabindex', 0);
+      e.style.outline = 0;
+
+      const cl = e.classList;
+      cl.add('value');
+      
+      // Add input field
+      this._input = e.addE('input');
+      this._input.setAttribute("type", "number");
+
+      if (this.value() !== undefined) {
+        this._input.value = this.value();
+      };
+
+      // If the focus is not on the text field anymore,
+      // delegate focus to
+      this._input.addEventListener(
+        'blur',
+        function (ev) {
+          const t = this;
+          if (!t._inField) {
+	          t.value(t._input.value);
+            t.store(t.value());
+          };
+          ev.halt();
+        }.bind(this)
+      );
+
+      // Workaround to check the click is in the field
+      e.addEventListener(
+        'mousedown',
+        function () {
+          this._inField = true;
+        }.bind(this)
+      );
+
+      e.addEventListener(
+        'mouseup',
+        function () {
+          this._inField = false;
+          this._input.focus();
+        }.bind(this)
+      );
+
+      this._input.addEventListener(
+        'keypress',
+        function (ev) {
+          const t = this;
+	        if (ev.keyCode == 13) {
+	          t.value(t._input.value);
+	          t.store(t.value());
+            return false;
+	        };
+        }.bind(this)
+      );
+
+      return e;
+    }
+  };
+});