diff --git a/examples/cities/pgsql/fload.sql b/examples/cities/pgsql/fload.sql
new file mode 100644
index 0000000..17839e3
--- /dev/null
+++ b/examples/cities/pgsql/fload.sql
@@ -0,0 +1,38 @@
+
+-- create functions for loading cities data as triples
+
+create or replace function load_cities() returns int as $$
+declare 
+  count int := 0;
+  event bigint := new_event();
+  city record;
+  rkey text;
+begin
+  for city in
+    select name, regiokey, ckey, inhabitants from cities
+      where rectype = '60'
+      --limit 1
+  loop
+    rkey := load_city(city.name, city.regiokey, city.ckey, city.inhabitants, event);
+    count := count + 1;
+  end loop;
+  return count;
+end;
+$$ language plpgsql;
+
+
+create or replace function load_city(
+    name text, regiokey text, ckey text, inhabitants int, 
+    event bigint) returns text as $$
+declare
+  key text := 'xcd:' || regiokey;
+begin
+  insert into vtriples (stname, stext, ptext, otname, otext, creation) values 
+    ('node', key, 'rdf:type', 'node', 'xc:City', event),
+    ('node', key, 'rdfs:label', 'text', name, event),
+    ('node', key, 'xc:regiokey', 'text', regiokey, event),
+    ('node', key, 'xc:ckey', 'text', ckey, event),
+    ('node', key, 'xc:population', 'int', text(inhabitants), event);
+  return regiokey;
+end;
+$$ language plpgsql;
diff --git a/examples/cities/pgsql/lmeta.sql b/examples/cities/pgsql/lmeta.sql
new file mode 100644
index 0000000..80ed464
--- /dev/null
+++ b/examples/cities/pgsql/lmeta.sql
@@ -0,0 +1,18 @@
+
+-- load metadata triples for cities example project
+
+select load_namespace('http://cyberconcepts.org/cco-example/cities#', 'xc');
+select load_namespace('http://cyberconcepts.org/cco-example/cities_data#', 'xcd');
+
+select new_event() as event
+\gset
+
+insert into vtriples (stname, stext, ptext, otname, otext, creation) values 
+    ('node', 'xc:City', 'rdf:type', 'node', 'rdfs:Class', :event),
+    ('node', 'xc:District', 'rdf:type', 'node', 'rdfs:Class', :event),
+    ('node', 'xc:FedCountry', 'rdf:type', 'node', 'rdfs:Class', :event),
+    ('node', 'xc:regiokey', 'rdf:type', 'node', 'rdf:Property', :event),
+    ('node', 'xc:ckey', 'rdf:type', 'node', 'rdf:Property', :event),
+    ('node', 'xc:population', 'rdf:type', 'node', 'rdf:Property', :event);
+
+-- property name -> rdfs:label
diff --git a/pgsql/lbase.sql b/pgsql/lbase.sql
index 92db7e7..aa32e94 100644
--- a/pgsql/lbase.sql
+++ b/pgsql/lbase.sql
@@ -1,11 +1,6 @@
 
 -- load base data
 
-select new_event() as event
-\gset
-
--- load data
-
 select load_namespace('http://cyberconcepts.org/cco-blank#', '_');
 select load_namespace('http://cyberconcepts.org/cco-common#', 'cco');
 select load_namespace('http://www.w3.org/1999/02/22-rdf-syntax-ns#', 'rdf');
@@ -21,8 +16,13 @@ select load_datatype('int');
 select load_datatype('decimal');
 select load_datatype('timestamp');
 
+select new_event() as event
+\gset
+
 insert into vtriples (stname, stext, ptext, otname, otext, creation) values 
     ('node', 'rdf:type', 'rdf:type', 'node', 'rdf:Property', :event),
     ('node', 'rdf:Property', 'rdf:type', 'node', 'rdfs:Class', :event),
     ('node', 'rdfs:Class', 'rdf:type', 'node', 'rdfs:Class', :event),
-    ('node', 'rdfs:label', 'rdf:type', 'node', 'rdf:Property', :event);
+    ('node', 'rdfs:label', 'rdf:type', 'node', 'rdf:Property', :event),
+    ('node', 'rdfs:domain', 'rdf:type', 'node', 'rdf:Property', :event),
+    ('node', 'rdfs:range', 'rdf:type', 'node', 'rdf:Property', :event);
diff --git a/pgsql/tgtriples.sql b/pgsql/tgtriples.sql
index 7571629..31346e3 100644
--- a/pgsql/tgtriples.sql
+++ b/pgsql/tgtriples.sql
@@ -2,13 +2,13 @@
 -- create triggers for triples table
 
 create or replace function insert_triple() returns trigger as $$
-  declare
-    trid bigint;
-  begin
-    trid := load_triple(new.stname, new.stext, new.ptext, 
-                        new.otname, new.otext, new.creation);
-    return new;
-  end;
+declare
+  trid bigint;
+begin
+  trid := load_triple(new.stname, new.stext, new.ptext, 
+                      new.otname, new.otext, new.creation);
+  return new;
+end;
 $$ language plpgsql;