{
   "class" : {
      "rdf:type" : "rdfs:Class",
      "rdfs:comment" : "A PublicationEvent corresponds indifferently to the event of publication for a CreativeWork of any type, e.g. a broadcast event, an on-demand event, a book/journal publication via a variety of delivery media.",
      "rdfs:label" : "PublicationEvent",
      "rdfs:subClassOf" : "schema:Event"
   },
   "properties" : {
      "schema:free" : {
         "rdf:type" : "rdf:Property",
         "rdfs:comment" : "A flag to signal that the item, event, or place is accessible for free.",
         "rdfs:label" : "free",
         "schema:domainIncludes" : "schema:PublicationEvent",
         "schema:rangeIncludes" : "schema:Boolean",
         "schema:supersededBy" : "schema:isAccessibleForFree"
      },
      "schema:publishedBy" : {
         "rdf:type" : "rdf:Property",
         "rdfs:comment" : "An agent associated with the publication event.",
         "rdfs:label" : "publishedBy",
         "schema:domainIncludes" : "schema:PublicationEvent",
         "schema:isPartOf" : "http:bib.schema.org",
         "schema:rangeIncludes" : [
            "schema:Organization",
            "schema:Person"
         ]
      },
      "schema:publishedOn" : {
         "rdf:type" : "rdf:Property",
         "rdfs:comment" : "A broadcast service associated with the publication event.",
         "rdfs:label" : "publishedOn",
         "schema:domainIncludes" : "schema:PublicationEvent",
         "schema:rangeIncludes" : "schema:BroadcastService"
      }
   }
}