diff --git a/2 - Metadata and Catalogue.ipynb b/2 - Metadata and Catalogue.ipynb
index 5afd444c521571234c8fdce2e9c5061f448bf27d..eb4bc497c7b4e2bb76c7565758e538eb07e0c629 100644
--- a/2 - Metadata and Catalogue.ipynb	
+++ b/2 - Metadata and Catalogue.ipynb	
@@ -205,6 +205,22 @@
     "```"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
+   "source": [
+    "* RDF (Resource Description Framework) W3C standard for modeling information\n",
+    "* RDF Triples\n",
+    "    * describe everything as subject, predicate and object expression\n",
+    "        * subject denotes the resource\n",
+    "        * predicate, a term used to describe the subject\n",
+    "        * object, the thing that the verb is acting upon, can be another resource, or just a literal value"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {
@@ -216,6 +232,29 @@
     "[https://json-ld.org/playground/](https://json-ld.org/playground/)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
+   "source": [
+    "* JSON-LD Processing Algorithms \n",
+    "    * JSON-LD Expaneded\n",
+    "        * replaces terms with the URIs they expand to\n",
+    "        * necessary for further transformations\n",
+    "        * removes context\n",
+    "    * JSOM-LD Compacted\n",
+    "        * removes context\n",
+    "        * makes it easier to read\n",
+    "    * JSON-LD Flattened\n",
+    "        * all properties of a node are collected in a __single__ JSON object \n",
+    "        * a labeled directed graph ()\n",
+    "    * JSON-LD Framing\n",
+    "        * [https://w3c.github.io/json-ld-framing/](https://w3c.github.io/json-ld-framing/)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {
@@ -665,7 +704,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.1"
+   "version": "3.6.7"
   }
  },
  "nbformat": 4,