TILE Forth version 3.32, Copyright (c) 1990, by Mikael Patel
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1: Some simple items and relations between them
items: d c b a 
a:relations: d c b a 
b:relations: 
c:relations: 
d:relations: 
a:values: d: 13 c: 12 b: 11 a: 10 
a:values: d: 13 c: 12 b: 11 
a:values: c: 12 b: 11 
Joe:values: profession: 1180776 address: 1180744 

2: Reflexive and symmetric relations
3: Directions and opposite directions
items: opposite west east south north profession address Joe d c b a 
west opposite east
east opposite west
south opposite north
north opposite south

4: A small map with locations and paths
items: Hotel Drugstore Macdonalds HardwareShop opposite west east south north profession address Joe d c b a 
Hotel:relations: west south east 
Macdonalds:relations: west north 
HardwareShop:relations: west 
Drugstore:relations: east 

5: Sets, Bags and Dictionaries using relations
items: aDictionary aBag aSet x Hotel Drugstore Macdonalds HardwareShop opposite west east south north profession address Joe d c b a 
0 -1 10 20 0 0 100 
aSet:relations: 
aBag:relations: 
aDictionary:relations: x 

6: Item relation database dump example
item is-a-string
item is-an-item
item dump
item aDictionary
item aBag
item aSet
item x
item Hotel
item Drugstore
item Macdonalds
item HardwareShop
item opposite
item west
item east
item south
item north
item profession
item address
item Joe
item d
item c
item b
item a

is-an-item dump  put-relation
100 x  put-relation
Hotel west  put-relation
Macdonalds south  put-relation
Hotel east  put-relation
Macdonalds east  put-relation
Drugstore west  put-relation
Hotel north  put-relation
Hotel west  put-relation
is-an-item dump  put-relation
is-an-item dump  put-relation
east opposite  put-relation
is-an-item dump  put-relation
west opposite  put-relation
is-an-item dump  put-relation
north opposite  put-relation
is-an-item dump  put-relation
south opposite  put-relation
is-a-string dump  put-relation
is-a-string dump  put-relation
" Forth Hacker" profession  put-relation
" Forth road 4, Forthiana" address  put-relation
12 c  put-relation
11 b  put-relation