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#725 added new query to notebook to add direct edge #726

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f677ea5
#725 added new query to notebook to add direct edge
charlesivie Jan 30, 2025
374dff8
OC-OVER-RDF 725 cleaned up a bit
charlesivie Feb 3, 2025
d5d7d86
OC-OVER-RDF 725 cleaned up a bit
Feb 3, 2025
ab749cc
OC-OVER-RDF 725 added new paragraph
Feb 3, 2025
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46 changes: 44 additions & 2 deletions ...tebook/notebooks/02-Neptune-Analytics/04-OpenCypher-Over-RDF/02-Air-Routes-GeoNames.ipynb
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Expand Up @@ -63,7 +63,6 @@
"execution_count": null,
"id": "98bf6d5e82a415f6",
"metadata": {
"collapsed": false,
"jupyter": {
"outputs_hidden": false
},
Expand Down Expand Up @@ -245,6 +244,18 @@
"RETURN gn_country.gn::name, ar_country.rdfs::label"
]
},
{
"cell_type": "markdown",
"id": "d38bce25",
"metadata": {},
"source": [
"## Modifying the RDF graph using openCypher\n",
"\n",
"We can use openCypher to modify the RDF graph, by performing CRUD (create, update and delete) operations.\n",
"\n",
"Here we insert new edges, creating alternative connections within the data to simplify querying and pathfinding:"
]
},
{
"cell_type": "markdown",
"id": "843d2e72",
Expand Down Expand Up @@ -277,6 +288,37 @@
"RETURN gn_country, matches, ar_country"
]
},
{
"cell_type": "markdown",
"id": "45a59ae1",
"metadata": {},
"source": [
"### Create a transitive edge (shortcut)\n",
"\n",
"Execute the following query to create a 'shortcut' in the model. It adds a direct edge between airports whenever a direct route exists, allowing for more efficient traversal.\n",
"\n",
"This modification, known as \"edge shortcutting\" or \"transitive edge creation,\" is a common technique in graph data modeling to enhance pathfinding efficiency and speed up queries. It is particularly useful when integrating large graphs into a unified structure."
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "e5767b62",
"metadata": {},
"outputs": [],
"source": [
"%%oc\n",
"\n",
"PREFIX nepo: <http://neptune.aws.com/ontology/airroutes/>\n",
"PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>\n",
"\n",
"MATCH (origin: nepo::Airport)\n",
" <-[:nepo::source]-(r: nepo::Route)-[:nepo::destination]->\n",
" (destination: nepo::Airport)\n",
"\n",
"CREATE (origin)-[:nepo::hasDirectRouteTo]->(destination)"
]
},
{
"cell_type": "markdown",
"id": "e19cbac4",
Expand Down Expand Up @@ -328,7 +370,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.10.13"
"version": "3.10.8"
}
},
"nbformat": 4,
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