diff --git a/editor/src/editor.js b/editor/src/editor.js
index fa669fc..cc37ca8 100644
--- a/editor/src/editor.js
+++ b/editor/src/editor.js
@@ -22,9 +22,14 @@ import 'prismjs/components/prism-jq'
 import MD from './markdown'
 import he from 'he'
 import {all, create} from 'mathjs'
+import formulaFunctions from './formula'
+
+moment.locale('nl')
 
 const math = create(all)
 
+math.import(formulaFunctions)
+
 function isMultiline(input) {
     return input.value.startsWith("```", 0)
         || input.value.startsWith("$$", 0)
@@ -151,8 +156,6 @@ function el(tag, children = []) {
 }
 
 function Editor(holder, input) {
-    let scope = {}
-
     function renderInline(cellText) {
         if (!cellText) return document.createTextNode('')
 
@@ -164,8 +167,11 @@ function Editor(holder, input) {
     }
 
     function transformTable(editor, id, element) {
+
         editor.treeForId(id).then(tree => {
-            let [header, rows] = tree[0].children
+            let header = _.find(tree[0].children, c => c.text === 'headers') || []
+            let rows = _.find(tree[0].children, c => c.text === 'rows') || []
+
             let rowData = _.map(rows.children, row => {
                 let page = row.text.substring(2).substring(0, row.text.length - 4)
                 return fetch('/' + page + '?format=metakv')
@@ -176,7 +182,11 @@ function Editor(holder, input) {
                             el("td", [renderInline(row.text)]),
                             ..._.map(header.children, col => {
                                 let td = el("td")
-                                transform(rowData[_.snakeCase(_.trim(col.text))], $(td), id, editor)
+                                let value = rowData[_.snakeCase(_.trim(col.text))];
+                                if (col.children && col.children.length > 0) {
+                                    value = col.children[0].text
+                                }
+                                transform(value ? value.replace(/^:/, '=') : '', $(td), id, editor, rowData)
                                 return td
                             })
                         ])
@@ -205,10 +215,13 @@ function Editor(holder, input) {
         })
     }
 
-    function transform(text, element, id, editor) {
+    function transform(text, element, id, editor, scope) {
         if (text === undefined) {
             return;
         }
+        if (!scope) {
+            scope = editor.scope || {}
+        }
 
         let converted = text
 
@@ -224,9 +237,10 @@ function Editor(holder, input) {
                 converted = converted + ' <span style="background: red; color: white;">' + e.message + '</span>';
             }
         } else {
-            let re = /^([A-Z0-9 ]+):: (.+)$/i;
-            if (text.match(re)) {
-                converted = converted.replace(re, '**[[$1]]**: $2')
+            let re = /^([A-Z0-9 ]+)::\s*(.+)$/i;
+            let res = text.match(re)
+            if (res) {
+                converted = '**[[' + res[1] + ']]**: ' + res[2]
             } else if (text.match(/#\[\[TODO]]/)) {
                 converted = converted.replace('#[[TODO]]', '<input class="checkbox" type="checkbox" />')
             } else if (text.match(/#\[\[DONE]]/)) {
@@ -248,6 +262,7 @@ function Editor(holder, input) {
 
     let editor = listEditor(holder, inputData, options);
     holder.$listEditor = editor
+    editor.scope = {}
 
     $(holder).find('.content input[type="checkbox"]').on('click', function (event) {
         let that = this
diff --git a/editor/src/formula.js b/editor/src/formula.js
new file mode 100644
index 0000000..1880f50
--- /dev/null
+++ b/editor/src/formula.js
@@ -0,0 +1,90 @@
+import moment from "moment";
+
+/**
+ * @param {string|moment.Moment} x
+ * @returns {moment.Moment}
+ */
+function date(x) {
+    if (!x) {
+        return moment()
+    }
+    if (_.isString(x)) {
+        let r = x.match(/^\[\[(.+)\]\]$/);
+        return moment(r[1], "DD MMM YYYY")
+    }
+    return moment(x);
+}
+
+/**
+ *
+ * @param {moment.Moment} d
+ * @param {int} n
+ * @param {string} s
+ * @returns {moment.Moment}
+ */
+function dateAdd(d, n, s) {
+    return date(d).add(n, s)
+}
+
+function dateFormat(d, fmt) {
+    return date(d).format(fmt)
+}
+
+function dateStartOf(d, period) {
+    return date(d).startOf(period)
+}
+
+function dateEndOf(d, period) {
+    return date(d).endOf(period)
+}
+
+function dateIsBefore(a, b) {
+    return date(a).isBefore(date(b))
+}
+
+function dateIsAfter(a, b) {
+    return date(a).isBefore(date(b))
+}
+
+function dateIsSame(a, b, g) {
+    return date(a).isSame(date(b), g);
+}
+
+function dateCalendar(d) {
+    return date(d).calendar(moment())
+}
+
+function dateDiff(a, b, g) {
+    return date(a).diff(date(b), g)
+}
+
+export default {
+    date,
+    dateAdd,
+    dateFormat,
+    dateStartOf,
+    dateEndOf,
+    dateIsBefore,
+    dateIsAfter,
+    dateIsSame,
+    dateCalendar,
+    dateDiff,
+    empty(x) {
+        return !x;
+    },
+    if: function (x, a, b) {
+        return x ? a : b
+    },
+    gt: function (a, b) {
+        return a > b
+    },
+    lt: function (a, b) {
+        return a < b
+    },
+    gteq: function (a, b) {
+        return a >= b
+    },
+    lteq: function (a, b) {
+        return a <= b
+    }
+}