userGrammar.xml

<?xml version="1.0" encoding="utf-8"?>
<grammar 
	root = "#top" 
	tag-format = "semantics/1.0-literals" 
	version = "1.0" 
	xml:base: "userGrammar" 
	xml:lang = "en" 
	xmlns = "http://www.w3.org/2001/06/grammar"
	xmlns:sapi= "http://schemas.microsoft.com/Speech/2002/06/SRGSExtensions">

	<!-- root element, the source of every possible user dialogue act -->
	<rule id="#top">
		<one-of>
			<item><ruleref uri="#request"/></item>
			<item><ruleref uri="#response"/></item>
		</one-of>
		<item repeat="0-1">
			<ruleref uri="#please"/>
		</item>
	</rule>

	<rule id="please">
		<one-of>
			<item>please</item>
			<item>kindly</item>
		</one-of>
	</rule>

	<!-- root element for a user request -->
	<rule id="request">
		<item repeat="0-1">
			<rulered uri="#greeting"/>
		</item>
		<oneof>
			<item><ruleref uri="#navigate"/></item>
			<item><ruleref uri="#browse"/></item>
		</oneof>
	</rule>

	<!-- root element for a user response -->
	<rule id="response">
		<one-of>
			<item>
				<one-of>
					<item>
						<one-of>
							<item>which</item>
							<item>where</item>
						</one-of>
						<item><ruleref uri="#aux_verb"/></item>
					</item>
					<item>show me</item>
				</one-of>
				<item repeat="0-1">
					<ruleref uri="#det"/>
				</item>
				<item>
					<ruleref uri="#proximity"/>
				</item>
			</item>
			<item><ruleref uri="#confirm"/></item>
			<item><ruleref uri="#item"/></item>
			<item><ruleref uri="#food_drink_desc"/></item>
		</one-of>
	</rule>

	<rule id="polite">
		<one-of>
			<item>please</item>
			<item>kindly</item>
		</one-of>
	</rule>

	<rule id="browse">
		<one-of>
			<item>what</item>
			<item>how many</item>
		</one-of>
		<item repeat="0-1"><ruleref uri="#shop_type"/></item>
		<item>shops are</item>
		<one-of>
			<item>available</item>
			<item>there</item>
		</one-of>
	</rule>

	<rule id="navigate">
		<one-of>
			<item>
				<item>I</item> 
				<item><ruleref uri="#want"/></item> 
				<item>to</item>
				<item><ruleref uri="#buy"/></item>
				<item repeat="0-1"><ruleref uri="#det"/></item>
				<item><ruleref uri="#item"/></item>
			</item>
			<item>
				<item><ruleref uri="#way"/></item>
				<item><ruleref uri="#place"/></item>
			</item>
		</one-of>
	</rule>

	<rule id="item">
		<one-of>
			<item>coffee</item>
			<item>clothes</item>
			<item>sandwiches</item>
			<item>toys</item>
			<item>music</item>
			<item>jewellery</item>
			<item>sports equipment</item>
		</one-of>
	</rule>

	<rule id="shop_type">
		<one-of>
			<item>coffee</item>
			<item>clothes</item>
			<item>sandwich</item>
			<item>toy</item>
			<item>music</item>
			<item>jewellery</item>
			<item>sports</item>
		</one-of>
	</rule>

	<rule id="shop_name">
		<one-of>
			<item>astrodollars</item>
			<item>caffe augustus</item>
			<item>sports indirect</item>
			<item>space</item>
			<item>underground train station</item>
		</one-of>

	<rule id="greeting">
		<one-of>
			<item>hello</item>
			<item>hi</item>
			<item>hey</item>
		</one-of>
	</rule>

	<rule id="confirm">
		<one-of>
			<item><ruleref uri="#yes"/></item>
			<item><ruleref uri="#no"/></item>
		</one-of>
	</rule>

	<rule id="yes">
		<item repeat="1-"> <tag> out="Yes"; </tag>
			<one-of>
				<item>yes</item>
				<item>yeah</item>
				<item>yep</item>
				<item>okay</item>
			</one-of>
		</item>
	</rule>

	<rule id="no">
		<item repeat="1-">
			<one-of>
				<item>no</item>
				<item>nah</item>
				<item>not really</item>
				<item>nope</item>
			</one-of>
		</item>
	</rule>

	<rule id="aux_verb">
		<item>is</item>
	</rule>

	<rule id="det">
		<one-of>
			<item>a</item>
			<item>an</item>
			<item>the</item>
			<item>some</item>
		</one-of>
	</rule>

	<rule id="proximity">
		<one-of>
			<item><ruleref uri="#close_by"/></item>
			<item><ruleref uri="#far_away"/></item>
		</one-of>
	</rule>

	<rule id="close_by">
		<one-of>
			<item>closest</item>
			<item>nearest</item>
		</one-of>
	</rule>

	<rule id="far_away">
		<item>furthest</item>
	</rule>

	<rule id="want">
		<one-of>
			<item>want</item>
			<item>would like</item>
			<item>wish</item>
		</one-of>
	</rule>

	<rule id="food_drink_desc">
		<one-of>
			<item>hot</item>
			<item>cold</item>
			<item>fast</item>
			<item>cooked</item>
			<item>local</item>
			<item>chinese</item>
			<item>italian</item>
			<item>healthy</item>
		</one-of>
	</rule>

	<rule id="buy">
		<one-of>
			<item>buy</item>
			<item>purchase</item>
			<item>get</item>
		</one-of>
	</rule>

	<rule id="place">
		<item><ruleref uri="#det"/></item>
		<one-of>
			<item><ruleref uri="#shop"/></item>
			<item><ruleref uri="#amenity"/></item>
			<item><ruleref uri="#proximity"/></item>
		</one-of>
	</rule>

	<rule id="amenity">
		<one-of>
			<item>
				<item repeat="0-1">
					<one-of>
						<item>mens</item>
						<item>womens</item>
					</one-of>
				</item>
				<item>toilet</item>
			</item>
			<item>exit</item>
		</one-of>
	</rule>

	<rule id="direction">
		<one-of>
			<item>how to get</item>
			<item>
				<item>the</item>
				<one-of>
					<item>way</item>
					<item>direction</item>
				</one-of>
			</item>
		</one-of>
	</rule>

	<rule id="explain">
		<one-of>
			<item>explain to</item>
			<item>tell</item>
		</one-of>
		<item>me</item>
	</rule>

	<rule id="shop">
		<item repeat="0-1"><ruleref uri="#shop_type"/></item>
		<item>shop</item>
	</rule>

	<rule id="way">
		<one-of>
			<item>
				<item repeat="0-1">
					<one-of>
						<item>Can</item>
						<item>Could</item>
					</one-of>
					<item>you</item>
				</item>
				<item><ruleref uri="#explain"/></item>
				<item><ruleref uri="#direction"/></item>
				<item>to</item>
			</item>
			<item>
				<item>Where</item>
				<item><ruleref uri="#aux_verb"/></item>
			</item>
		</one-of>
	</rule>

</grammar>