| Comment: sample names file

overweight, normal, underweight.	| class names

patient ID:	label.			| identifies the patient
age:		continuous.		| age is a number
height (cms):	continuous.		| so is height ..
weight (kg):	continuous.		| .. and weight
sex:		male, female.		| a discrete attribute
bodymassindex:=	weight / height^2.	| an implicit attribute defined by a formula

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Alternative form using an attribute as the class:
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| Comment: sample names file

description.				| name of class attribute

patient ID:	label.			| identifies the patient
age:		continuous.		| age is a number
height (cms):	continuous.		| so is height ..
weight (kg):	continuous.		| .. and weight
sex:		male, female.		| a discrete attribute
bodymassindex:=	weight / height^2.	| an implicit attribute defined by a formula
description:	overweight, normal, underweight.