diff --git a/src/database/db_core.rs b/src/database/db_core.rs
index ac612fe..395fbd8 100644
--- a/src/database/db_core.rs
+++ b/src/database/db_core.rs
@@ -2,11 +2,9 @@ use super::space::Position;
 use super::space::Shape;
 use super::space::Space;
 use super::space_db::SpaceDB;
-use super::space_index::SpaceFields;
 use super::space_index::SpaceSetObject;
 use super::DataBase;
 use super::ResultSet;
-use crate::SpaceObject;
 
 pub struct CoreQueryParameters<'a> {
     pub db: &'a DataBase,
@@ -67,16 +65,6 @@ impl Properties {
     }
 }
 
-// FIXME: Which is faster, the code below or the automatically generated
-//        implementation?
-/*
-impl PartialEq for Properties {
-    fn eq(&self, other: &Self) -> bool {
-        self.id() == other.id() && self.type_name() == other.type_name()
-    }
-}
-*/
-
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct Core {
     title: String,
@@ -159,24 +147,6 @@ impl Core {
         &self.properties
     }
 
-    fn to_space_object(
-        &self,
-        space_id: &str,
-        list: Vec<(Position, SpaceFields)>,
-    ) -> Vec<SpaceObject> {
-        list.into_iter()
-            .map(|(position, fields)| {
-                let offset: usize = fields.value().into();
-                let value = self.properties[offset].clone();
-                SpaceObject {
-                    space_id: space_id.to_string(),
-                    position: position.clone(),
-                    value,
-                }
-            })
-            .collect()
-    }
-
     fn decode_positions(
         list: &mut [(Position, &Properties)],
         space: &Space,
@@ -430,9 +400,3 @@ impl Core {
         Ok(results)
     }
 }
-
-impl ironsea_index::Record<String> for Core {
-    fn key(&self) -> String {
-        self.title.clone()
-    }
-}
diff --git a/src/database/mod.rs b/src/database/mod.rs
index 459f40e..fdad9c7 100644
--- a/src/database/mod.rs
+++ b/src/database/mod.rs
@@ -29,7 +29,6 @@ pub struct SpaceObject {
     pub value: Properties,
 }
 
-#[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct DataBase {
     reference_spaces: ReferenceSpaceIndex,
     cores: CoreIndex,
@@ -85,7 +84,7 @@ impl DataBase {
         }
     }
 
-    pub fn load_core(name: &str) -> Result<(Vec<Space>, Core), String> {
+    fn load_core(name: &str) -> Result<(Vec<Space>, Core), String> {
         let mmap = DataBase::mmap_file(&name)?;
 
         match bincode::deserialize(&mmap[..]) {
@@ -181,3 +180,9 @@ impl ironsea_index::Record<String> for Space {
         self.name().clone()
     }
 }
+
+impl ironsea_index::Record<String> for Core {
+    fn key(&self) -> String {
+        self.name().clone()
+    }
+}