.

graph/src/indexer.rs

@@ -56,6 +56,24 @@ impl<'a> Indexer<'a> {
         ])
     }
 
+    fn work(&self, graph: &Graph, subject: NamedNodeRef) -> HashMap<Field, OwnedValue> {
+        HashMap::from_iter([
+            (
+                Schema::field("title", self.language.primary_language()),
+                self.extract_string(graph, subject, vocab::rdawd::TITLE_OF_WORK),
+            ),
+        ])
+    }
+
+    fn expression(&self, graph: &Graph, subject: NamedNodeRef) -> HashMap<Field, OwnedValue> {
+        HashMap::from_iter([
+            (
+                Schema::field("title", self.language.primary_language()),
+                self.extract_string(graph, subject, vocab::rdaed::TITLE_OF_EXPRESSION),
+            ),
+        ])
+    }
+
     pub fn graph(&self, graph: &Graph) -> crate::Result<Vec<HashMap<Field, OwnedValue>>> {
         let mut entities_and_types = HashSet::new();
         let triples = graph.triples_for_predicate(vocab::rdf::TYPE);
@@ -73,10 +91,10 @@ impl<'a> Indexer<'a> {
                         Class::RdfProperty => None,
                         Class::RdfsClass => None,
                         Class::SkosConcept => None,
-                        Class::Work => Some(self.person(graph, *subject)),
+                        Class::Work => Some(self.work(graph, *subject)),
                         Class::Person => Some(self.person(graph, *subject)),
                         Class::CorporateBody => Some(self.corporate_body(graph, *subject)),
-                        Class::Expression => Some(self.person(graph, *subject)),
+                        Class::Expression => Some(self.expression(graph, *subject)),
                         Class::Manifestation => Some(self.person(graph, *subject)),
                     }.map(|mut document| {
                         document.insert(Schema::discriminant_field(), OwnedValue::from(class as u64));

graph/src/vocab.rs

@@ -56,3 +56,17 @@ pub mod rdaad {
     pub const NAME_OF_CORPORATE_BODY: NamedNodeRef =
         NamedNodeRef::new_unchecked("http://rdaregistry.info/Elements/a/datatype/P50032");
 }
+
+pub mod rdawd {
+    use oxigraph::model::NamedNodeRef;
+
+    pub const TITLE_OF_WORK: NamedNodeRef =
+        NamedNodeRef::new_unchecked("http://rdaregistry.info/Elements/w/datatype/P10088");
+}
+
+pub mod rdaed {
+    use oxigraph::model::NamedNodeRef;
+
+    pub const TITLE_OF_EXPRESSION: NamedNodeRef =
+        NamedNodeRef::new_unchecked("http://rdaregistry.info/Elements/e/datatype/P20312");
+}