diff --git a/2 - Metadata and Catalogue.ipynb b/2 - Metadata and Catalogue.ipynb
index 85ad7e097dd6a3ea36d2139262315595f54ce865..5afd444c521571234c8fdce2e9c5061f448bf27d 100644
--- a/2 - Metadata and Catalogue.ipynb	
+++ b/2 - Metadata and Catalogue.ipynb	
@@ -8,7 +8,11 @@
     }
    },
    "source": [
-    "# 2 - Metadata and Catalogue"
+    "# 2 - Metadata and Catalogue\n",
+    "\n",
+    "[https://labs.onb.ac.at/en/dataset/lod/](https://labs.onb.ac.at/en/dataset/lod/)\n",
+    "\n",
+    "[https://labs.onb.ac.at/en/tool/sparql/](https://labs.onb.ac.at/en/tool/sparql/)"
    ]
   },
   {
@@ -34,9 +38,9 @@
     }
    },
    "source": [
-    "* Example SRU (2.1)\n",
-    "* Example data harvesting OAI-PMH (2.2)\n",
-    "* Example SPARQL (2.3)"
+    "* Example: SRU (2.1)\n",
+    "* Example: data harvesting OAI-PMH (2.2)\n",
+    "* Example: SPARQL (2.3)"
    ]
   },
   {
@@ -75,7 +79,7 @@
     "* MARC\n",
     "    * MARC (MAchine-Readable Cataloging) standards\n",
     "        * developed in the 1960s to create records that could be read by computers and shared among libraries\n",
-    "    * MARC 21 MARC record format for the 21st century"
+    "    * MARC 21, MARC record format for the 21st century"
    ]
   },
   {
@@ -201,6 +205,17 @@
     "```"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "fragment"
+    }
+   },
+   "source": [
+    "[https://json-ld.org/playground/](https://json-ld.org/playground/)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {
@@ -320,6 +335,217 @@
     "    * alma.mmsid=990034300920603338%20or%20alma.mmsid=990028618530603338 ([https://obv-at-oenb.alma.exlibrisgroup.com/view/sru/43ACC_ONB?version=1.2&query=alma.mms_id=990034300920603338%20or%20alma.mms_id=990028618530603338&startRecord=1&maximumRecords=5&operation=searchRetrieve&recordSchema=dc](https://obv-at-oenb.alma.exlibrisgroup.com/view/sru/43ACC_ONB?version=1.2&query=alma.mms_id=990034300920603338%20or%20alma.mms_id=990028618530603338&startRecord=1&maximumRecords=5&operation=searchRetrieve&recordSchema=dc))"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "slideshow": {
+     "slide_type": "slide"
+    }
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "<searchRetrieveResponse xmlns=\"http://www.loc.gov/zing/srw/\">\n",
+      "  <version>1.2</version>\n",
+      "  <numberOfRecords>1</numberOfRecords>\n",
+      "  <records>\n",
+      "    <record>\n",
+      "      <recordSchema>marcxml</recordSchema>\n",
+      "      <recordPacking>xml</recordPacking>\n",
+      "      <recordData>\n",
+      "        <record xmlns=\"http://www.loc.gov/MARC21/slim\">\n",
+      "          <leader>00000nam a2200000 c 4500</leader>\n",
+      "          <controlfield tag=\"001\">990030217420603338</controlfield>\n",
+      "          <controlfield tag=\"005\">20180123084300.0</controlfield>\n",
+      "          <controlfield tag=\"007\">cr#|||||||||||</controlfield>\n",
+      "          <controlfield tag=\"007\">tu</controlfield>\n",
+      "          <controlfield tag=\"008\">000101|1814####xx############|||#|#ger#u</controlfield>\n",
+      "          <controlfield tag=\"009\">AC09865194</controlfield>\n",
+      "          <datafield tag=\"035\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"a\">AC09865194</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"035\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"a\">(Aleph)009871525ACC01</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"035\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"a\">(DE-599)OBVAC09865194</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"035\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"a\">(AT-OBV)AC09865194</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"035\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"a\">(EXLNZ-43ACC_NETWORK)990098715250203331</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"040\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"a\">ONB</subfield>\n",
+      "            <subfield code=\"b\">ger</subfield>\n",
+      "            <subfield code=\"c\">ONB-AK-RETRO</subfield>\n",
+      "            <subfield code=\"d\">AT-OeNB</subfield>\n",
+      "            <subfield code=\"e\">pi</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"041\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"a\">ger</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"044\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"c\">XA-DXDE</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"245\" ind1=\"0\" ind2=\"0\">\n",
+      "            <subfield code=\"a\">&lt;&lt;Die&gt;&gt; Flucht über den Rhein odar Das unverhoffte Wiedersehen</subfield>\n",
+      "            <subfield code=\"b\">Ein erlustirend historisch-rührendes Familiengemälde mit Erscheinungen und vollstimmigen Chören von Baschkiren und Cosaken, und allen Batterien der Deutschen</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"264\" ind1=\" \" ind2=\"1\">\n",
+      "            <subfield code=\"a\">[Meißen]</subfield>\n",
+      "            <subfield code=\"b\">[Gödsche]</subfield>\n",
+      "            <subfield code=\"c\">1814</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"300\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"a\">32 S.</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"689\" ind1=\"0\" ind2=\"0\">\n",
+      "            <subfield code=\"a\">Deutschland</subfield>\n",
+      "            <subfield code=\"D\">g</subfield>\n",
+      "            <subfield code=\"0\">(DE-588)4011882-4</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"689\" ind1=\"0\" ind2=\"1\">\n",
+      "            <subfield code=\"a\">Krieg</subfield>\n",
+      "            <subfield code=\"D\">s</subfield>\n",
+      "            <subfield code=\"0\">(DE-588)4033114-3</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"689\" ind1=\"0\" ind2=\"3\">\n",
+      "            <subfield code=\"a\">Belletristische Darstellung</subfield>\n",
+      "            <subfield code=\"A\">f</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"689\" ind1=\"0\" ind2=\" \">\n",
+      "            <subfield code=\"5\">AT-OBV</subfield>\n",
+      "            <subfield code=\"5\">ONB-AK</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"689\" ind1=\"1\" ind2=\"0\">\n",
+      "            <subfield code=\"a\">Drama</subfield>\n",
+      "            <subfield code=\"D\">s</subfield>\n",
+      "            <subfield code=\"0\">(DE-588)4012899-4</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"689\" ind1=\"1\" ind2=\"1\">\n",
+      "            <subfield code=\"a\">Deutsch</subfield>\n",
+      "            <subfield code=\"D\">s</subfield>\n",
+      "            <subfield code=\"0\">(DE-588)4113292-0</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"689\" ind1=\"1\" ind2=\" \">\n",
+      "            <subfield code=\"5\">AT-OBV</subfield>\n",
+      "            <subfield code=\"5\">ONB-AK</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"710\" ind1=\"2\" ind2=\" \">\n",
+      "            <subfield code=\"a\">Goedsche, Friedrich Wilhelm</subfield>\n",
+      "            <subfield code=\"4\">pbl</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"856\" ind1=\"4\" ind2=\" \">\n",
+      "            <subfield code=\"u\">http://data.onb.ac.at/imgk/AZ00308934SZ00220134SZ00628562</subfield>\n",
+      "            <subfield code=\"z\">Zettel</subfield>\n",
+      "            <subfield code=\"o\">Katalogkarte</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"856\" ind1=\"4\" ind2=\"0\">\n",
+      "            <subfield code=\"m\">V:AT-OBV;B:AT-OeNB</subfield>\n",
+      "            <subfield code=\"q\">application/html</subfield>\n",
+      "            <subfield code=\"u\">http://data.onb.ac.at/ABO/%2BZ182067107</subfield>\n",
+      "            <subfield code=\"x\">ONB-ABO</subfield>\n",
+      "            <subfield code=\"3\">Volltext</subfield>\n",
+      "            <subfield code=\"o\">OBV-ONB-ABO</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"856\" ind1=\"4\" ind2=\"0\">\n",
+      "            <subfield code=\"m\">V:AT-OBV;B:AT-OeNB</subfield>\n",
+      "            <subfield code=\"q\">application/html</subfield>\n",
+      "            <subfield code=\"u\">http://data.onb.ac.at/ABO/%2BZ199052304</subfield>\n",
+      "            <subfield code=\"x\">ONB-ABO</subfield>\n",
+      "            <subfield code=\"3\">Volltext</subfield>\n",
+      "            <subfield code=\"o\">OBV-ONB-ABO</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"974\" ind1=\"0\" ind2=\"s\">\n",
+      "            <subfield code=\"V\">029</subfield>\n",
+      "            <subfield code=\"a\">LZ01187985</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"974\" ind1=\"0\" ind2=\"s\">\n",
+      "            <subfield code=\"F\">030</subfield>\n",
+      "            <subfield code=\"A\">u|1uf||||||37</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"974\" ind1=\"0\" ind2=\"s\">\n",
+      "            <subfield code=\"F\">050</subfield>\n",
+      "            <subfield code=\"A\">a|a|||||g|||||</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"974\" ind1=\"0\" ind2=\"s\">\n",
+      "            <subfield code=\"F\">051</subfield>\n",
+      "            <subfield code=\"A\">m|||||||</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"980\" ind1=\"0\" ind2=\" \">\n",
+      "            <subfield code=\"a\">0</subfield>\n",
+      "            <subfield code=\"9\">LOCAL</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"980\" ind1=\"0\" ind2=\" \">\n",
+      "            <subfield code=\"a\">ONB-AK-RETRO</subfield>\n",
+      "            <subfield code=\"9\">LOCAL</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"982\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"f\">Drama</subfield>\n",
+      "            <subfield code=\"9\">LOCAL</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"982\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"f\">Dramen / deutsche / 19. Jh.</subfield>\n",
+      "            <subfield code=\"9\">LOCAL</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"AVA\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"0\">990030217420603338</subfield>\n",
+      "            <subfield code=\"8\">22288570940003338</subfield>\n",
+      "            <subfield code=\"a\">43ACC_ONB</subfield>\n",
+      "            <subfield code=\"b\">ZALT</subfield>\n",
+      "            <subfield code=\"c\">State Hall at Josefsplatz</subfield>\n",
+      "            <subfield code=\"d\">80.J.58</subfield>\n",
+      "            <subfield code=\"e\">available</subfield>\n",
+      "            <subfield code=\"f\">1</subfield>\n",
+      "            <subfield code=\"g\">0</subfield>\n",
+      "            <subfield code=\"i\">ONB</subfield>\n",
+      "            <subfield code=\"j\">PRUNK</subfield>\n",
+      "            <subfield code=\"p\">1</subfield>\n",
+      "            <subfield code=\"q\">Department of Manuscripts and Rare Books (ALT)</subfield>\n",
+      "          </datafield>\n",
+      "          <datafield tag=\"AVA\" ind1=\" \" ind2=\" \">\n",
+      "            <subfield code=\"0\">990030217420603338</subfield>\n",
+      "            <subfield code=\"8\">22288570920003338</subfield>\n",
+      "            <subfield code=\"a\">43ACC_ONB</subfield>\n",
+      "            <subfield code=\"b\">ZFID</subfield>\n",
+      "            <subfield code=\"c\">Bildarchiv und Grafiksammlung</subfield>\n",
+      "            <subfield code=\"d\">288765-B</subfield>\n",
+      "            <subfield code=\"e\">available</subfield>\n",
+      "            <subfield code=\"f\">1</subfield>\n",
+      "            <subfield code=\"g\">0</subfield>\n",
+      "            <subfield code=\"i\">ONB</subfield>\n",
+      "            <subfield code=\"j\">MAG</subfield>\n",
+      "            <subfield code=\"p\">2</subfield>\n",
+      "            <subfield code=\"q\">Picture Archives and Graphics Department (FID)</subfield>\n",
+      "          </datafield>\n",
+      "        </record>\n",
+      "      </recordData>\n",
+      "      <recordIdentifier>990030217420603338</recordIdentifier>\n",
+      "      <recordPosition>0</recordPosition>\n",
+      "    </record>\n",
+      "  </records>\n",
+      "  <extraResponseData xmlns:xb=\"http://www.exlibris.com/repository/search/xmlbeans/\">\n",
+      "    <xb:exact>true</xb:exact>\n",
+      "    <xb:responseDate>2019-04-27T11:10:11+0200</xb:responseDate>\n",
+      "  </extraResponseData>\n",
+      "</searchRetrieveResponse>\n",
+      "\n"
+     ]
+    }
+   ],
+   "source": [
+    "import requests\n",
+    "from lxml import etree\n",
+    "cont=requests.get(\"https://obv-at-oenb.alma.exlibrisgroup.com/view/sru/43ACC_ONB?version=1.2&query=alma.barcode=%2BZ199052304&startRecord=0&maximumRecords=1&operation=searchRetrieve&recordSchema=marcxml\").content\n",
+    "e = etree.XML(cont)\n",
+    "print(etree.tostring(e, encoding='unicode', pretty_print=True))"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {
@@ -344,7 +570,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 3,
    "metadata": {
     "slideshow": {
      "slide_type": "slide"
@@ -439,7 +665,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.7"
+   "version": "3.7.1"
   }
  },
  "nbformat": 4,