<?xml version="1.0" encoding="UTF-8"?>
<Assert xmlns="http://www.ruleml.org/0.88/xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ruleml.org/0.88/xsd http://www.ruleml.org/0.88/xsd/urdatalog.xsd">
<!-- challenge rule from RuleML site -->
<content>
<And innerclose="universal">
<formula>
<Implies>
<head>
<Atom>
<opr>
<Rel>may look at</Rel>
</opr>
<arg index="1">
<Var>you</Var>
</arg>
<arg index="2">
<Ind wref="http://www.cs.brandeis.edu/...">Rule-Based Systems</Ind>
</arg>
</Atom>
</head>
<body>
<Atom>
<opr>
<Rel>want to review</Rel>
</opr>
<arg index="1">
<Var>you</Var>
</arg>
<arg index="2">
<Ind>rule principles</Ind>
</arg>
</Atom>
</body>
</Implies>
</formula>
<formula>
<Atom>
<opr>
<Rel>want to review</Rel>
</opr>
<arg index="1">
<Ind>fred</Ind>
</arg>
<arg index="2">
<Ind>rule principles</Ind>
</arg>
</Atom>
</formula>
</And>
</content>
</Assert>