<s>
Pattern	B-Application
calculus	I-Application
bases	O
all	O
computation	O
on	O
pattern	B-Language
matching	I-Language
of	O
a	O
very	O
general	O
kind	O
.	O
</s>
<s>
uniform	O
treatment	O
of	O
function	B-Language
evaluation	I-Language
.	O
</s>
<s>
arbitrary	O
data	B-General_Concept
structure	I-General_Concept
.	O
</s>
