diff --git a/DD-API-Oper demo.ipynb b/DD-API-Oper demo.ipynb
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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Het gebruik van de rws dd-api-oper\n",
+    "\n",
+    "## Inleiding\n",
+    "\n",
+    "Rws gaat gebruik maken van de digitale delta api voor het verspreiden van data. Ze gebruiken daarbij de digitale delta variant voor operationele data voor.\n",
+    "\n",
+    "De authorisatie gebeurt op basis van PKI (overheids) certificaten.\n",
+    "\n",
+    "## Een demo van de digitale delta api op basis van python\n",
+    "\n",
+    "We zullen gebruik maken van de module \"ddapioper.py\" waarmee we het gebruik demonstreren. We starten met de import van de module.\n",
+    "\n",
+    "Vervolgens maken we een object aan die we het certificaat mee geven. Dit object rws verzorgt de dd-api calls."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from ddapioper import ddApiOper"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "rws = ddApiOper(\"<todo>.crt\", \"<todo>.key\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Het opvragen van de lokaties\n",
+    "\n",
+    "We gaan nu de locaties opvragen. Vervolgens zullen we de details van een lokatie tonen."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "lokaties = rws.locations()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "scrolled": false
+   },
+   "outputs": [],
+   "source": [
+    "print(lokaties.locationNames())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(lokaties.data)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(lokaties.locationDetail(\"hoekvanholland\"))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Het opvragen van de quantities\n",
+    "\n",
+    "We gaan nu de quantities opvragen. Eerst zullen we alle quantities opvragen en daarna van de locatie Hoek van Holland."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "quantities = rws.quantities()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(quantities.quantities())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "quantities_hoek = rws.location_quantities(\"hoekvanholland\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(quantities_hoek.quantities())"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Het opvragen van de waterhoogte van hoek van holland\n",
+    "\n",
+    "We gaan nu de waterhoogte opvragen van hoek van holland. Vervolgens printen we de bron, provider, aspectset, locaties en de waarde.\n",
+    "\n",
+    "Daarna kijken we naar de sip compatable output.\n",
+    "\n",
+    "We geven geen tijden op bij dit verzoek. De default is altijd de metingen van de laatste dag!"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "hoekvanholland = rws.values(\"hoekvanholland\", \"waterlevel\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(hoekvanholland.source())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(hoekvanholland.provider())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(hoekvanholland.aspectSet())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(hoekvanholland.location())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "for v in hoekvanholland.values():\n",
+    "    print(v)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "print(hoekvanholland.sip())"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import plotly.graph_objects as go"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "x = []\n",
+    "y = []\n",
+    "for v in hoekvanholland.values():\n",
+    "    x.append(v[0])\n",
+    "    y.append(v[1])    "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "fig = go.Figure()\n",
+    "fig.add_trace(go.Scatter(x=x, y=y, line=dict(color='firebrick', width=4)))\n",
+    "fig.update_layout(title='Waterhoogte Hoek van Holland',\n",
+    "                   xaxis_title='tijd', yaxis_title='Hooghte cm')\n",
+    "fig.show()"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}