RDF and ontology mappings: Difference between revisions

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Line 4: * '''Ontology projections''' that re-express the data in an established vocabulary such as the [https://pro.europeana.eu/page/edm-documentation Europeana Data Model] (EDM). Each one is defined by a '''Mapping''' page. Each export is produced on demand from the page's current data and downloads as a Turtle or TriG file. A projection can also be kept in a SPARQL store and queried live. —{{#ifexist:SPARQL queries\|This wiki has such a store: see [[SPARQL queries]].}} on{{#ifexist:EDM ~~wikis~~queries\|The ~~that~~store ~~have~~holds athe ~~store~~native and the EDM projection side by ~~configured~~side, ~~such~~so asa ~~the~~query ~~NeoWiki~~can ~~development~~join ~~stack~~across both — see [[EDM queries]].}} == The Mapping page == Each Mapping page targets one ontology, named by the page title, and holds an entry for every mapped Schema. ~~This~~[[Special:Mappings]] lists them all; this wiki ships one: * [[Mapping:EDM]] —: the Person, City, Artwork and Artist Schemas, all mapped to EDM == Explore the projections == Follow these in order; each link downloads the projection so you can read it. You don't need these links to reach an export: on any subject page, the Data tab offers per-projection downloads (Turtle or TriG) and a copy-IRI control, and the sidebar has a View RDF link. # '''Pablo Picasso''', [{{SERVER}}{{SCRIPTPATH}}/rest.php/neowiki/v0/page/{{PAGEID:Pablo Picasso}}/rdf native] vs [{{SERVER}}{{SCRIPTPATH}}/rest.php/neowiki/v0/page/{{PAGEID:Pablo Picasso}}/rdf?projection=EDM EDM]: the native file has everything, including the two-layer "Born in" relation and the page metadata; the EDM file is an <code>edm:Agent</code> carrying only the mapped vocabulary, with the unmapped <code>Source</code> absent. # '''Málaga''', [{{SERVER}}{{SCRIPTPATH}}/rest.php/neowiki/v0/page/{{PAGEID:Málaga}}/rdf?projection=EDM EDM]: an <code>edm:Place</code> ~~— and~~with the very same entity IRI that Picasso's <code>rdaGr2:placeOfBirth</code> points at, because sibling projections share entity IRIs. # '''The Milkmaid''', [{{SERVER}}{{SCRIPTPATH}}/rest.php/neowiki/v0/page/{{PAGEID:The Milkmaid}}/rdf?projection=EDM EDM]: an <code>edm:ProvidedCHO</code> whose <code>dc:creator</code> is the IRI of [{{SERVER}}{{SCRIPTPATH}}/rest.php/neowiki/v0/page/{{PAGEID:Johannes Vermeer}}/rdf?projection=EDM Vermeer] (an <code>edm:Agent</code>) and whose <code>edm:currentLocation</code> is the Rijksmuseum. # '''Johann Sebastian Bach''', [{{SERVER}}{{SCRIPTPATH}}/rest.php/neowiki/v0/page/{{PAGEID:Johann Sebastian Bach}}/rdf?projection=EDM EDM]: Bach's birth is modelled as its own [[Birth of Johann Sebastian Bach\|Birth Subject]] instead of flat fields, so his <code>edm:Agent</code> projects sparse. ~~— the same~~Same Person Schema as Picasso, a different modelling style. # '''ACME Inc''', [{{SERVER}}{{SCRIPTPATH}}/rest.php/neowiki/v0/page/{{PAGEID:ACME Inc}}/rdf?projection=EDM EDM]: its Company Schema has no EDM Mapping, so the EDM projection comes back empty. —An aunmapped Schema ~~without a Mapping~~ is simply ~~absent~~left out, ~~which is how~~so ~~conformant~~the ~~output~~projection stays conformant. == Learn more == * [[Special:Mappings]]: every ontology Mapping on this wiki * [https://github.com/ProfessionalWiki/NeoWiki/blob/master/docs/rdf/rdf-export.md RDF export reference] * [https://~~github~~neowiki.~~com/ProfessionalWiki/NeoWiki/blob/master~~ai/docs/rdf/~~ontology~~rdf-~~mapping.md~~export ~~Ontology~~RDF ~~mapping~~export reference] * [https://neowiki.ai/docs/rdf/ontology-mapping Ontology mapping reference] * [https://~~github~~neowiki.~~com/ProfessionalWiki/NeoWiki/blob/master~~ai/docs/~~examples~~rdf/person-to-edm~~.md~~ Person-to-EDM worked example] * Tell us what you need from RDF and ontology mapping: [https://github.com/ProfessionalWiki/NeoWiki/discussions/996 join the discussion].