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https://github.com/dnlbauer/django-signposting.git
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0cd321112f
* use rdflib to extract signposts from jsonld * use rdflib to extract signposts from jsonld * linting * unit tests for jsonld middleware * update readme * update flake pipeline --------- Co-authored-by: Daniel Bauer <daniel.bauer@senckenberg.de>
137 lines
3.1 KiB
Python
137 lines
3.1 KiB
Python
from rdflib import Graph
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from rdflib.query import Result
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def root_element_query(g: Graph) -> Result:
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return g.query("""
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PREFIX schema: <http://schema.org/>
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SELECT DISTINCT ?rootElement
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WHERE {
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# has a type
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?rootElement a ?type ;
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# has a license or an author or a creator
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(schema:license | schema:author | schema:creator ) ?value .
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# No incoming edges for ?rootElement
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FILTER NOT EXISTS { ?s ?p ?rootElement }
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}
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LIMIT 1
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""")
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def type_query(g: Graph, rootElement: str) -> Graph:
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return g.query(
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"""
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PREFIX schema: <?context>
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SELECT DISTINCT ?type
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WHERE {
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?rootElement a ?type .
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}
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""",
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initBindings={"rootElement": rootElement},
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)
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def author_query(g: Graph, rootElement: str):
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return g.query(
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"""
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PREFIX schema: <http://schema.org/>
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SELECT ?author_id ?identifier ?url
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WHERE {
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?rootElement schema:author ?author .
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BIND(?author AS ?author_id) # Get the @id of the author
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OPTIONAL { ?author schema:identifier ?identifier }
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OPTIONAL { ?author schema:url ?url }
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}
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LIMIT 1
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""",
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initBindings={"rootElement": rootElement},
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)
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def license_query(g: Graph, rootElement: str):
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return g.query(
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"""
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PREFIX schema: <http://schema.org/>
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SELECT ?element_id ?identifier ?url
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WHERE {
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?rootElement schema:license ?element .
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BIND(?element AS ?element_id) # Get the @id of the element
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OPTIONAL { ?element schema:identifier ?identifier }
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OPTIONAL { ?element schema:url ?url }
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}
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LIMIT 1
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""",
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initBindings={"rootElement": rootElement},
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)
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def cite_query(g: Graph, rootElement: str):
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return g.query(
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"""
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PREFIX schema: <http://schema.org/>
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SELECT ?element_id ?identifier ?url
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WHERE {
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?rootElement schema:url ?element .
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BIND(?element AS ?element_id) # Get the @id of the element
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OPTIONAL { ?element schema:identifier ?identifier }
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OPTIONAL { ?element schema:url ?url }
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}
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LIMIT 1
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""",
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initBindings={"rootElement": rootElement},
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)
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def sameas_query(g: Graph, rootElement: str):
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return g.query(
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"""
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PREFIX schema: <http://schema.org/>
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SELECT ?element_id ?contentUrl ?identifier ?url ?encoding
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WHERE {
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?rootElement schema:sameAs ?element .
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BIND(?element AS ?element_id) # Get the @id of the element
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OPTIONAL { ?element schema:contentUrl ?contentUrl }
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OPTIONAL { ?element schema:identifier ?identifier }
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OPTIONAL { ?element schema:url ?url }
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OPTIONAL { ?element schema:encodingFormat ?encoding }
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}
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""",
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initBindings={"rootElement": rootElement},
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)
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def item_query(g: Graph, rootElement: str):
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return g.query(
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"""
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PREFIX schema: <http://schema.org/>
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SELECT ?element_id ?identifier ?url ?contentUrl ?encoding
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WHERE {
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?rootElement schema:hasPart ?element .
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#VALUES ?element_type { schema:MediaObject schema:Dataset }
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#?element a ?element_type .
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BIND(?element AS ?element_id) # Get the @id of the element
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OPTIONAL { ?element schema:contentUrl ?contentUrl }
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OPTIONAL { ?element schema:identifier ?identifier }
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OPTIONAL { ?element schema:url ?url }
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OPTIONAL { ?element schema:encodingFormat ?encoding }
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}
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""",
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initBindings={"rootElement": rootElement},
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)
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