Schema.org

Re-writing of schemaorg in Clojure.

Changes:

• no local triple store, schema units are retrieved via SPARQL HTTP
• extended generic term page template
• no extension, all namespaces considered equal
• one server can serve other namespaces along with the default namespace

TODO:

• other templates
  • fullReleasePage.tpl
• redirection to other known namespace (and mark domain/range as unknown if somewhere else)
• examples
• 'see also' and 'source' links
• RDFa annotations (or JSON-LD?)
• static site generation build command
• content negotiation
• unit caching
• logging
• reorganizing templates (e.g. put HTML head in a separate file)
• write templates with hiccup (Clojure DSL for HTML)?
• unit tests
• document properties (e.g. sitename, sitebase)

Prerequisites

• Leiningen 2.0.0 or above
• A SPARQL 1.1 query endpoint accessible via HTTP (e.g. Apache Fuseki)

SPARQL dataset structure

Schema definitions belonging to a given namespace are expected to be put in a named graph whose URI is the same as the namespace URI (without trailing slash).

For instance, one can have

GRAPH <http://schema.org> {
    <http://schema.org/Thing> a rdfs:Class ;
        rdfs:label "Thing" ;
        rdfs:comment "The most generic type of item." .
}

GRAPH <http://core.example.org> {
    <http://core.example.org/Something> a rdfs:Class ;
        rdfs:label "Something" ;
        rdfs:comment "Well... Anything." ;
        rdfs:subClassOf <http://schema.org/Thing> .
}

Running

First, open resources/schemaorg.properties and change sparql_endpoint to point to your own SPARQL endpoint:

sitename=example.org
sitemode=mainsite
sparql_endpoint=http://example.org/someSPARQLEndpoint

Then, to start a web server for the application, run:

lein ring server

License

Copyright © 2017 Victor Charpenay