proof
tag is used to present the
proof or explanation of a rule. The
statement and proof
tags
appear inside the rule tag to state a rule and to
present the proof of the rule.
This CNXML:
<rule id="py-rule" type="theorem">
<title>Pythagorean Theorem</title>
<statement id="py-statement">
<para id="ruleexp1">
On a right triangle, the sum of the squares of
the sides equals the square of the hypotenuse.
</para>
</statement>
<proof id="py-proof">
<para id="ruleexp2">
<link url="http://en.wikipedia.org
/wiki/Pythagorean_theorem#Proofs"
window="new">
Click here to see a few proofs.
</link>
</para>
</proof>
</rule>
Results in this display:
On a right triangle, the sum of the squares of the sides equals the square of the hypotenuse.