diff --git a/2 - Metadata and Catalogue.ipynb b/2 - Metadata and Catalogue.ipynb
index 2636c36dbd08f7d3b05e23c0fdb6f4e6cd38cb54..c0682e1bf974c227e9acbc28306c514c8defd9fe 100644
--- a/2 - Metadata and Catalogue.ipynb	
+++ b/2 - Metadata and Catalogue.ipynb	
@@ -19,7 +19,7 @@
     }
    },
    "source": [
-    "In this block:\n",
+    "### In this block:\n",
     "\n",
     "* Overview data formats\n",
     "* Overview container formats\n",
@@ -39,6 +39,143 @@
     "* Example SPARQL (2.3)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "slide"
+    }
+   },
+   "source": [
+    "## Overview data formats"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
+   "source": [
+    "* Dublin Core\n",
+    "    * set of vocabulary terms to describe digital resources\n",
+    "    * 15 classic metadata terms, known as the Dublin Core Metadata Element Set (DCMES)\n",
+    "    * [Dublin Core Metadata Initiative](http://dublincore.org/)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "fragment"
+    }
+   },
+   "source": [
+    "* 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"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "slide"
+    }
+   },
+   "source": [
+    "* Dublin Core Metadata Element Set (DCMES) 1.1\n",
+    "\n",
+    "    1. Title: The name of the object\n",
+    "    2. Creator: An entity primarily responsible for making the resource\n",
+    "    3. Subject: The topic addressed by the work\n",
+    "    4. Description: An account of the resource\n",
+    "    5. Publisher: The agent or agency responsible for making the object available\n",
+    "    6. Contributor: An entity responsible for making contributions to the resource\n",
+    "    7. Date: The date of publication\n",
+    "    8. Type: The nature or genre of the resource\n",
+    "    9. Format: The file format, physical medium, or dimensions of the resource\n",
+    "    10. Identifier: String or number used to uniquely identify the object "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "slide"
+    }
+   },
+   "source": [
+    "* Dublin Core Metadata Element Set (DCMES) 1.1\n",
+    "    \n",
+    "    11. Source: Objects, either print or electronic, from which this object is derived, if applicable\n",
+    "    12. Language: Language of the intellectual content\n",
+    "    13. Relation: Relationship to other objects\n",
+    "    14. Coverage: The spatial locations and temporal durations characteristic of the object\n",
+    "    15. Rights: Information about rights held in and over the resource    "
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "slide"
+    }
+   },
+   "source": [
+    "## Overview container formats"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
+   "source": [
+    "* Simple DC container XML Schema [http://www.dublincore.org/schemas/xmls/](http://www.dublincore.org/schemas/xmls/)\n",
+    "![simpledc xml schema](./media/simpledc.png)\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
+   "source": [
+    "* MARCXML\n",
+    "    * MARCXML is an XML schema based on the common MARC21 standards\n",
+    "    * [http://www.loc.gov/standards/marcxml/](http://www.loc.gov/standards/marcxml/)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "slide"
+    }
+   },
+   "source": [
+    "## Overview protocols"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
+   "source": [
+    "* OAI-PMH\n",
+    "* SRU"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -64,7 +201,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.3"
+   "version": "3.6.7"
   }
  },
  "nbformat": 4,
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