Pykg2tbl dcat query.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "b7c72676",
   "metadata": {},
   "source": [
    "# Pykg2tbl to query rdf files\n",
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "e9adae3a",
   "metadata": {},
   "outputs": [],
   "source": [
    "from pykg2tbl import DefaultSparqlBuilder, KGSource\n",
    "\n",
    "# The rdf file representing from the Eurobis ERDDAP\n",
    "dcat_source = \"http://erddap.eurobis.org/catalog/dcat\"\n",
    "# Create a Knowledge Table\n",
    "source_KG2tbl = KGSource.build(dcat_source)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "5a15c68a",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Simple query to get the datasets in the SERVER, each title and last modified date.\n",
    "\n",
    "query =\"\"\"\n",
    "PREFIX dcat: <http://www.w3.org/ns/dcat#>\n",
    "PREFIX dcterms: <http://purl.org/dc/terms/>\n",
    "SELECT ?dataset ?title ?modified\n",
    "WHERE {\n",
    "  ?dataset a dcat:Dataset ;\n",
    "           dcterms:title ?title ;\n",
    "           dcterms:modified ?modified .\n",
    "}\n",
    "\"\"\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "6fab7f07",
   "metadata": {},
   "outputs": [],
   "source": [
    "result = source_KG2tbl.query(query)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "c15768f6",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<div>\n",
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       "\n",
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       "    }\n",
       "\n",
       "    .dataframe thead th {\n",
       "        text-align: right;\n",
       "    }\n",
       "</style>\n",
       "<table border=\"1\" class=\"dataframe\">\n",
       "  <thead>\n",
       "    <tr style=\"text-align: right;\">\n",
       "      <th></th>\n",
       "      <th>dataset</th>\n",
       "      <th>title</th>\n",
       "      <th>modified</th>\n",
       "    </tr>\n",
       "  </thead>\n",
       "  <tbody>\n",
       "    <tr>\n",
       "      <th>0</th>\n",
       "      <td>http://erddap.eurobis.org/erddap/tabledap/24hr...</td>\n",
       "      <td>Zooplankton abundance for six 24hrs sampling s...</td>\n",
       "      <td>2021-02-04T00:00:00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>1</th>\n",
       "      <td>http://erddap.eurobis.org/erddap/tabledap/ArcOD</td>\n",
       "      <td>Alaska Ocean Observing System</td>\n",
       "      <td>2021-02-06T00:00:00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>2</th>\n",
       "      <td>http://erddap.eurobis.org/erddap/tabledap/Asso...</td>\n",
       "      <td>Cetacean sightings along the central Catalan c...</td>\n",
       "      <td>2021-02-04T00:00:00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>3</th>\n",
       "      <td>http://erddap.eurobis.org/erddap/tabledap/Belm...</td>\n",
       "      <td>Mesozooplankton - Crustacea from the South Adr...</td>\n",
       "      <td>2021-02-07T00:00:00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>4</th>\n",
       "      <td>http://erddap.eurobis.org/erddap/tabledap/Belm...</td>\n",
       "      <td>Microzooplankton - Crustacea from the South Ad...</td>\n",
       "      <td>2021-02-07T00:00:00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>...</th>\n",
       "      <td>...</td>\n",
       "      <td>...</td>\n",
       "      <td>...</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>762</th>\n",
       "      <td>http://erddap.eurobis.org/erddap/tabledap/zoop...</td>\n",
       "      <td>Zooplankton collected in the Mediterranean Sea...</td>\n",
       "      <td>2021-02-04T00:00:00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>763</th>\n",
       "      <td>http://erddap.eurobis.org/erddap/tabledap/zoop...</td>\n",
       "      <td>Zooplankton respiration data from Fort Jesus a...</td>\n",
       "      <td>2021-02-04T00:00:00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>764</th>\n",
       "      <td>http://erddap.eurobis.org/erddap/tabledap/zoop...</td>\n",
       "      <td>Zooplankton community in Gazi Creek sampled mo...</td>\n",
       "      <td>2021-02-04T00:00:00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>765</th>\n",
       "      <td>http://erddap.eurobis.org/erddap/tabledap/zoop...</td>\n",
       "      <td>Seasonal variation of the zooplankton communit...</td>\n",
       "      <td>2021-02-04T00:00:00</td>\n",
       "    </tr>\n",
       "    <tr>\n",
       "      <th>766</th>\n",
       "      <td>http://erddap.eurobis.org/erddap/tabledap/zoop...</td>\n",
       "      <td>Zooplankton community of Shirazi bay (Kenya) s...</td>\n",
       "      <td>2021-02-04T00:00:00</td>\n",
       "    </tr>\n",
       "  </tbody>\n",
       "</table>\n",
       "<p>767 rows × 3 columns</p>\n",
       "</div>"
      ],
      "text/plain": [
       "                                               dataset  \\\n",
       "0    http://erddap.eurobis.org/erddap/tabledap/24hr...   \n",
       "1      http://erddap.eurobis.org/erddap/tabledap/ArcOD   \n",
       "2    http://erddap.eurobis.org/erddap/tabledap/Asso...   \n",
       "3    http://erddap.eurobis.org/erddap/tabledap/Belm...   \n",
       "4    http://erddap.eurobis.org/erddap/tabledap/Belm...   \n",
       "..                                                 ...   \n",
       "762  http://erddap.eurobis.org/erddap/tabledap/zoop...   \n",
       "763  http://erddap.eurobis.org/erddap/tabledap/zoop...   \n",
       "764  http://erddap.eurobis.org/erddap/tabledap/zoop...   \n",
       "765  http://erddap.eurobis.org/erddap/tabledap/zoop...   \n",
       "766  http://erddap.eurobis.org/erddap/tabledap/zoop...   \n",
       "\n",
       "                                                 title             modified  \n",
       "0    Zooplankton abundance for six 24hrs sampling s...  2021-02-04T00:00:00  \n",
       "1                        Alaska Ocean Observing System  2021-02-06T00:00:00  \n",
       "2    Cetacean sightings along the central Catalan c...  2021-02-04T00:00:00  \n",
       "3    Mesozooplankton - Crustacea from the South Adr...  2021-02-07T00:00:00  \n",
       "4    Microzooplankton - Crustacea from the South Ad...  2021-02-07T00:00:00  \n",
       "..                                                 ...                  ...  \n",
       "762  Zooplankton collected in the Mediterranean Sea...  2021-02-04T00:00:00  \n",
       "763  Zooplankton respiration data from Fort Jesus a...  2021-02-04T00:00:00  \n",
       "764  Zooplankton community in Gazi Creek sampled mo...  2021-02-04T00:00:00  \n",
       "765  Seasonal variation of the zooplankton communit...  2021-02-04T00:00:00  \n",
       "766  Zooplankton community of Shirazi bay (Kenya) s...  2021-02-04T00:00:00  \n",
       "\n",
       "[767 rows x 3 columns]"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "result.to_dataframe()"
   ]
  }
 ],
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