diff --git a/posts/calculate-differences-of-ifc-files-with-hashing.ipynb b/posts/calculate-differences-of-ifc-files-with-hashing.ipynb
index c34cc66..17cd41f 100644
--- a/posts/calculate-differences-of-ifc-files-with-hashing.ipynb
+++ b/posts/calculate-differences-of-ifc-files-with-hashing.ipynb
@@ -22,7 +22,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "![image.png](/images/find_diff.png)"
+    "![find_diff.png](../images/find_diff.png)"
    ]
   },
   {
@@ -36,7 +36,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "![image.png](/images/min_diff.JPG)"
+    "![min_diff.jpg](../images/min_diff.jpg)"
    ]
   },
   {
@@ -89,7 +89,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "![image.png](/images/ifc_schema.png)"
+    "![ifc_schema.png](../images/ifc_schema.png)"
    ]
   },
   {
@@ -125,18 +125,25 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": 5,
    "metadata": {},
    "outputs": [
     {
-     "data": {
-      "text/plain": [
-       "('ifcopenshell.zip', <http.client.HTTPMessage at 0x1b4b63e6b48>)"
-      ]
-     },
-     "execution_count": 1,
-     "metadata": {},
-     "output_type": "execute_result"
+     "ename": "KeyboardInterrupt",
+     "evalue": "",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[0;31mKeyboardInterrupt\u001b[0m                         Traceback (most recent call last)",
+      "Cell \u001b[0;32mIn[5], line 4\u001b[0m\n\u001b[1;32m      2\u001b[0m url \u001b[38;5;241m=\u001b[39m \u001b[38;5;124m'\u001b[39m\u001b[38;5;124mhttps://s3.amazonaws.com/ifcopenshell-builds/ifcopenshell-python-36-v0.6.0-0d93633-linux64.zip\u001b[39m\u001b[38;5;124m'\u001b[39m\n\u001b[1;32m      3\u001b[0m filename \u001b[38;5;241m=\u001b[39m \u001b[38;5;124m'\u001b[39m\u001b[38;5;124mifcopenshell.zip\u001b[39m\u001b[38;5;124m'\u001b[39m\n\u001b[0;32m----> 4\u001b[0m \u001b[43murllib\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mrequest\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43murlretrieve\u001b[49m\u001b[43m(\u001b[49m\u001b[43murl\u001b[49m\u001b[43m,\u001b[49m\u001b[43m \u001b[49m\u001b[43mfilename\u001b[49m\u001b[43m)\u001b[49m\n",
+      "File \u001b[0;32m/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/urllib/request.py:268\u001b[0m, in \u001b[0;36murlretrieve\u001b[0;34m(url, filename, reporthook, data)\u001b[0m\n\u001b[1;32m    265\u001b[0m     reporthook(blocknum, bs, size)\n\u001b[1;32m    267\u001b[0m \u001b[38;5;28;01mwhile\u001b[39;00m \u001b[38;5;28;01mTrue\u001b[39;00m:\n\u001b[0;32m--> 268\u001b[0m     block \u001b[38;5;241m=\u001b[39m \u001b[43mfp\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mread\u001b[49m\u001b[43m(\u001b[49m\u001b[43mbs\u001b[49m\u001b[43m)\u001b[49m\n\u001b[1;32m    269\u001b[0m     \u001b[38;5;28;01mif\u001b[39;00m \u001b[38;5;129;01mnot\u001b[39;00m block:\n\u001b[1;32m    270\u001b[0m         \u001b[38;5;28;01mbreak\u001b[39;00m\n",
+      "File \u001b[0;32m/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/http/client.py:459\u001b[0m, in \u001b[0;36mHTTPResponse.read\u001b[0;34m(self, amt)\u001b[0m\n\u001b[1;32m    456\u001b[0m \u001b[38;5;28;01mif\u001b[39;00m amt \u001b[38;5;129;01mis\u001b[39;00m \u001b[38;5;129;01mnot\u001b[39;00m \u001b[38;5;28;01mNone\u001b[39;00m:\n\u001b[1;32m    457\u001b[0m     \u001b[38;5;66;03m# Amount is given, implement using readinto\u001b[39;00m\n\u001b[1;32m    458\u001b[0m     b \u001b[38;5;241m=\u001b[39m \u001b[38;5;28mbytearray\u001b[39m(amt)\n\u001b[0;32m--> 459\u001b[0m     n \u001b[38;5;241m=\u001b[39m \u001b[38;5;28;43mself\u001b[39;49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mreadinto\u001b[49m\u001b[43m(\u001b[49m\u001b[43mb\u001b[49m\u001b[43m)\u001b[49m\n\u001b[1;32m    460\u001b[0m     \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[38;5;28mmemoryview\u001b[39m(b)[:n]\u001b[38;5;241m.\u001b[39mtobytes()\n\u001b[1;32m    461\u001b[0m \u001b[38;5;28;01melse\u001b[39;00m:\n\u001b[1;32m    462\u001b[0m     \u001b[38;5;66;03m# Amount is not given (unbounded read) so we must check self.length\u001b[39;00m\n\u001b[1;32m    463\u001b[0m     \u001b[38;5;66;03m# and self.chunked\u001b[39;00m\n",
+      "File \u001b[0;32m/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/http/client.py:503\u001b[0m, in \u001b[0;36mHTTPResponse.readinto\u001b[0;34m(self, b)\u001b[0m\n\u001b[1;32m    498\u001b[0m         b \u001b[38;5;241m=\u001b[39m \u001b[38;5;28mmemoryview\u001b[39m(b)[\u001b[38;5;241m0\u001b[39m:\u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39mlength]\n\u001b[1;32m    500\u001b[0m \u001b[38;5;66;03m# we do not use _safe_read() here because this may be a .will_close\u001b[39;00m\n\u001b[1;32m    501\u001b[0m \u001b[38;5;66;03m# connection, and the user is reading more bytes than will be provided\u001b[39;00m\n\u001b[1;32m    502\u001b[0m \u001b[38;5;66;03m# (for example, reading in 1k chunks)\u001b[39;00m\n\u001b[0;32m--> 503\u001b[0m n \u001b[38;5;241m=\u001b[39m \u001b[38;5;28;43mself\u001b[39;49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mfp\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mreadinto\u001b[49m\u001b[43m(\u001b[49m\u001b[43mb\u001b[49m\u001b[43m)\u001b[49m\n\u001b[1;32m    504\u001b[0m \u001b[38;5;28;01mif\u001b[39;00m \u001b[38;5;129;01mnot\u001b[39;00m n \u001b[38;5;129;01mand\u001b[39;00m b:\n\u001b[1;32m    505\u001b[0m     \u001b[38;5;66;03m# Ideally, we would raise IncompleteRead if the content-length\u001b[39;00m\n\u001b[1;32m    506\u001b[0m     \u001b[38;5;66;03m# wasn't satisfied, but it might break compatibility.\u001b[39;00m\n\u001b[1;32m    507\u001b[0m     \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39m_close_conn()\n",
+      "File \u001b[0;32m/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/socket.py:704\u001b[0m, in \u001b[0;36mSocketIO.readinto\u001b[0;34m(self, b)\u001b[0m\n\u001b[1;32m    702\u001b[0m \u001b[38;5;28;01mwhile\u001b[39;00m \u001b[38;5;28;01mTrue\u001b[39;00m:\n\u001b[1;32m    703\u001b[0m     \u001b[38;5;28;01mtry\u001b[39;00m:\n\u001b[0;32m--> 704\u001b[0m         \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[38;5;28;43mself\u001b[39;49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43m_sock\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mrecv_into\u001b[49m\u001b[43m(\u001b[49m\u001b[43mb\u001b[49m\u001b[43m)\u001b[49m\n\u001b[1;32m    705\u001b[0m     \u001b[38;5;28;01mexcept\u001b[39;00m timeout:\n\u001b[1;32m    706\u001b[0m         \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39m_timeout_occurred \u001b[38;5;241m=\u001b[39m \u001b[38;5;28;01mTrue\u001b[39;00m\n",
+      "File \u001b[0;32m/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/ssl.py:1241\u001b[0m, in \u001b[0;36mSSLSocket.recv_into\u001b[0;34m(self, buffer, nbytes, flags)\u001b[0m\n\u001b[1;32m   1237\u001b[0m     \u001b[38;5;28;01mif\u001b[39;00m flags \u001b[38;5;241m!=\u001b[39m \u001b[38;5;241m0\u001b[39m:\n\u001b[1;32m   1238\u001b[0m         \u001b[38;5;28;01mraise\u001b[39;00m \u001b[38;5;167;01mValueError\u001b[39;00m(\n\u001b[1;32m   1239\u001b[0m           \u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mnon-zero flags not allowed in calls to recv_into() on \u001b[39m\u001b[38;5;132;01m%s\u001b[39;00m\u001b[38;5;124m\"\u001b[39m \u001b[38;5;241m%\u001b[39m\n\u001b[1;32m   1240\u001b[0m           \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39m\u001b[38;5;18m__class__\u001b[39m)\n\u001b[0;32m-> 1241\u001b[0m     \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[38;5;28;43mself\u001b[39;49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mread\u001b[49m\u001b[43m(\u001b[49m\u001b[43mnbytes\u001b[49m\u001b[43m,\u001b[49m\u001b[43m \u001b[49m\u001b[43mbuffer\u001b[49m\u001b[43m)\u001b[49m\n\u001b[1;32m   1242\u001b[0m \u001b[38;5;28;01melse\u001b[39;00m:\n\u001b[1;32m   1243\u001b[0m     \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[38;5;28msuper\u001b[39m()\u001b[38;5;241m.\u001b[39mrecv_into(buffer, nbytes, flags)\n",
+      "File \u001b[0;32m/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/ssl.py:1099\u001b[0m, in \u001b[0;36mSSLSocket.read\u001b[0;34m(self, len, buffer)\u001b[0m\n\u001b[1;32m   1097\u001b[0m \u001b[38;5;28;01mtry\u001b[39;00m:\n\u001b[1;32m   1098\u001b[0m     \u001b[38;5;28;01mif\u001b[39;00m buffer \u001b[38;5;129;01mis\u001b[39;00m \u001b[38;5;129;01mnot\u001b[39;00m \u001b[38;5;28;01mNone\u001b[39;00m:\n\u001b[0;32m-> 1099\u001b[0m         \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[38;5;28;43mself\u001b[39;49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43m_sslobj\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mread\u001b[49m\u001b[43m(\u001b[49m\u001b[38;5;28;43mlen\u001b[39;49m\u001b[43m,\u001b[49m\u001b[43m \u001b[49m\u001b[43mbuffer\u001b[49m\u001b[43m)\u001b[49m\n\u001b[1;32m   1100\u001b[0m     \u001b[38;5;28;01melse\u001b[39;00m:\n\u001b[1;32m   1101\u001b[0m         \u001b[38;5;28;01mreturn\u001b[39;00m \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39m_sslobj\u001b[38;5;241m.\u001b[39mread(\u001b[38;5;28mlen\u001b[39m)\n",
+      "\u001b[0;31mKeyboardInterrupt\u001b[0m: "
+     ]
     }
    ],
    "source": [
@@ -148,7 +155,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -166,13 +173,13 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "('Duplex_files.zip', <http.client.HTTPMessage at 0x1b4b6432f48>)"
+       "('Duplex_files.zip', <http.client.HTTPMessage at 0x104dea6a0>)"
       ]
      },
      "execution_count": 3,
@@ -189,9 +196,23 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": null,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "ename": "BadZipFile",
+     "evalue": "File is not a zip file",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[0;31mBadZipFile\u001b[0m                                Traceback (most recent call last)",
+      "Cell \u001b[0;32mIn[4], line 2\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[38;5;28;01mimport\u001b[39;00m \u001b[38;5;21;01mzipfile\u001b[39;00m\n\u001b[0;32m----> 2\u001b[0m \u001b[38;5;28;01mwith\u001b[39;00m \u001b[43mzipfile\u001b[49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43mZipFile\u001b[49m\u001b[43m(\u001b[49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[38;5;124;43mDuplex_files.zip\u001b[39;49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[43m,\u001b[49m\u001b[43m \u001b[49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[38;5;124;43mr\u001b[39;49m\u001b[38;5;124;43m'\u001b[39;49m\u001b[43m)\u001b[49m \u001b[38;5;28;01mas\u001b[39;00m zip_ref:\n\u001b[1;32m      3\u001b[0m     zip_ref\u001b[38;5;241m.\u001b[39mextractall(\u001b[38;5;124m'\u001b[39m\u001b[38;5;124mDuplex\u001b[39m\u001b[38;5;124m'\u001b[39m)\n",
+      "File \u001b[0;32m/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/zipfile.py:1257\u001b[0m, in \u001b[0;36mZipFile.__init__\u001b[0;34m(self, file, mode, compression, allowZip64, compresslevel, strict_timestamps)\u001b[0m\n\u001b[1;32m   1255\u001b[0m \u001b[38;5;28;01mtry\u001b[39;00m:\n\u001b[1;32m   1256\u001b[0m     \u001b[38;5;28;01mif\u001b[39;00m mode \u001b[38;5;241m==\u001b[39m \u001b[38;5;124m'\u001b[39m\u001b[38;5;124mr\u001b[39m\u001b[38;5;124m'\u001b[39m:\n\u001b[0;32m-> 1257\u001b[0m         \u001b[38;5;28;43mself\u001b[39;49m\u001b[38;5;241;43m.\u001b[39;49m\u001b[43m_RealGetContents\u001b[49m\u001b[43m(\u001b[49m\u001b[43m)\u001b[49m\n\u001b[1;32m   1258\u001b[0m     \u001b[38;5;28;01melif\u001b[39;00m mode \u001b[38;5;129;01min\u001b[39;00m (\u001b[38;5;124m'\u001b[39m\u001b[38;5;124mw\u001b[39m\u001b[38;5;124m'\u001b[39m, \u001b[38;5;124m'\u001b[39m\u001b[38;5;124mx\u001b[39m\u001b[38;5;124m'\u001b[39m):\n\u001b[1;32m   1259\u001b[0m         \u001b[38;5;66;03m# set the modified flag so central directory gets written\u001b[39;00m\n\u001b[1;32m   1260\u001b[0m         \u001b[38;5;66;03m# even if no files are added to the archive\u001b[39;00m\n\u001b[1;32m   1261\u001b[0m         \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39m_didModify \u001b[38;5;241m=\u001b[39m \u001b[38;5;28;01mTrue\u001b[39;00m\n",
+      "File \u001b[0;32m/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/python3.9/zipfile.py:1324\u001b[0m, in \u001b[0;36mZipFile._RealGetContents\u001b[0;34m(self)\u001b[0m\n\u001b[1;32m   1322\u001b[0m     \u001b[38;5;28;01mraise\u001b[39;00m BadZipFile(\u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mFile is not a zip file\u001b[39m\u001b[38;5;124m\"\u001b[39m)\n\u001b[1;32m   1323\u001b[0m \u001b[38;5;28;01mif\u001b[39;00m \u001b[38;5;129;01mnot\u001b[39;00m endrec:\n\u001b[0;32m-> 1324\u001b[0m     \u001b[38;5;28;01mraise\u001b[39;00m BadZipFile(\u001b[38;5;124m\"\u001b[39m\u001b[38;5;124mFile is not a zip file\u001b[39m\u001b[38;5;124m\"\u001b[39m)\n\u001b[1;32m   1325\u001b[0m \u001b[38;5;28;01mif\u001b[39;00m \u001b[38;5;28mself\u001b[39m\u001b[38;5;241m.\u001b[39mdebug \u001b[38;5;241m>\u001b[39m \u001b[38;5;241m1\u001b[39m:\n\u001b[1;32m   1326\u001b[0m     \u001b[38;5;28mprint\u001b[39m(endrec)\n",
+      "\u001b[0;31mBadZipFile\u001b[0m: File is not a zip file"
+     ]
+    }
+   ],
    "source": [
     "import zipfile\n",
     "with zipfile.ZipFile('Duplex_files.zip', 'r') as zip_ref:\n",
@@ -214,7 +235,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -226,7 +247,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -246,7 +267,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -262,7 +283,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -278,7 +299,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -295,7 +316,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -314,7 +335,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 19,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -452,7 +473,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 59,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -487,7 +508,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 60,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -531,7 +552,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 61,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -548,7 +569,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 62,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -614,7 +635,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "![image.png](/images/hash_table.png)"
+    "![hash_table.png](../images/hash_table.png)"
    ]
   },
   {
@@ -652,7 +673,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 63,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -679,7 +700,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 64,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -782,7 +803,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 65,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -828,7 +849,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 66,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -894,7 +915,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 67,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -1020,7 +1041,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "![image.png](/images/added.JPG)"
+    "![added.jpg](../images/added.jpg)"
    ]
   },
   {
@@ -1034,7 +1055,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "![image.png](/images/deleted.JPG)"
+    "![deleted.jpg](../images/deleted.jpg)"
    ]
   },
   {
@@ -1048,7 +1069,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "![image.png](/images/modified.JPG)"
+    "![modified.jpg](../images/modified.jpg)"
    ]
   },
   {
@@ -1062,7 +1083,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "![image.png](/images/all_changes.JPG)"
+    "![all_changes.jpg](../images/all_changes.jpg)"
    ]
   },
   {
@@ -1096,9 +1117,10 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.6"
+   "version": "3.9.6"
   },
   "nikola": {
+   "author": "Johan Luttun",
    "category": "",
    "date": "2020-09-28 14:56:00 UTC+02:00",
    "description": "",
@@ -1106,8 +1128,7 @@
    "slug": "calculate-differences-of-ifc-files-with-hashing",
    "tags": "",
    "title": "Calculate Differences of IFC files with Hashing",
-   "type": "text",
-   "author": "Johan Luttun"
+   "type": "text"
   }
  },
  "nbformat": 4,