Schema and Item Type Manager updates to handle item type templates

Note that there's no code for user types and fields yet -- just the schema (actually there's a tiny bit of code in the item type manager, since we'll probably use some of the same methods for managing user types, but not much)

Templates for primary item types are currently only used by the item type manager to make creating new types easier and to prevent the removal of fields from an item type that are associated with its template item type -- the fields are all still recorded in itemTypeFields, since they might have different orders or default visibility settings from their templates

system.sql

@@ -1,4 +1,4 @@
--- 1
+-- 2
 
 -- This file creates system tables that can be safely wiped and reinitialized
 -- at any time, as long as existing ids are preserved.
@@ -8,7 +8,8 @@
     DROP TABLE IF EXISTS itemTypes;
     CREATE TABLE itemTypes (
         itemTypeID INTEGER PRIMARY KEY,
-        typeName TEXT
+        typeName TEXT,
+        templateItemTypeID INT
     );
     
     -- Describes various types of fields and their format restrictions,
@@ -38,7 +39,7 @@
         orderIndex INT,
         PRIMARY KEY (itemTypeID, fieldID),
         FOREIGN KEY (itemTypeID) REFERENCES itemTypes(itemTypeID),
-        FOREIGN KEY (fieldID) REFERENCES itemTypes(itemTypeID)
+        FOREIGN KEY (fieldID) REFERENCES fields(fieldID)
     );
     
     DROP TABLE IF EXISTS charsets;
@@ -129,20 +130,20 @@
     INSERT INTO "fieldFormats" VALUES(2, '[0-9]*', 1);
     INSERT INTO "fieldFormats" VALUES(3, '[0-9]{4}', 1);
     
-    INSERT INTO itemTypes VALUES (1,'note');
-    INSERT INTO itemTypes VALUES (2,'book');
-    INSERT INTO itemTypes VALUES (3,'bookSection');
-    INSERT INTO itemTypes VALUES (4,'journalArticle');
-    INSERT INTO itemTypes VALUES (5,'magazineArticle');
-    INSERT INTO itemTypes VALUES (6,'newspaperArticle');
-    INSERT INTO itemTypes VALUES (7,'thesis');
-    INSERT INTO itemTypes VALUES (8,'letter');
-    INSERT INTO itemTypes VALUES (9,'manuscript');
-    INSERT INTO itemTypes VALUES (10,'interview');
-    INSERT INTO itemTypes VALUES (11,'film');
-    INSERT INTO itemTypes VALUES (12,'artwork');
-    INSERT INTO itemTypes VALUES (13,'website');
-    INSERT INTO itemTypes VALUES (14,'attachment');
+    INSERT INTO itemTypes VALUES (1,'note',NULL);
+    INSERT INTO itemTypes VALUES (2,'book',NULL);
+    INSERT INTO itemTypes VALUES (3,'bookSection',2);
+    INSERT INTO itemTypes VALUES (4,'journalArticle',NULL);
+    INSERT INTO itemTypes VALUES (5,'magazineArticle',NULL);
+    INSERT INTO itemTypes VALUES (6,'newspaperArticle',NULL);
+    INSERT INTO itemTypes VALUES (7,'thesis',NULL);
+    INSERT INTO itemTypes VALUES (8,'letter',NULL);
+    INSERT INTO itemTypes VALUES (9,'manuscript',NULL);
+    INSERT INTO itemTypes VALUES (10,'interview',NULL);
+    INSERT INTO itemTypes VALUES (11,'film',NULL);
+    INSERT INTO itemTypes VALUES (12,'artwork',NULL);
+    INSERT INTO itemTypes VALUES (13,'website',NULL);
+    INSERT INTO itemTypes VALUES (14,'attachment',NULL);
 
     INSERT INTO fields VALUES (1,'url',NULL);
     INSERT INTO fields VALUES (2,'rights',NULL);