SrgsRule.Scope 属性


获取或设置是否可以为识别激活一条规则,以及此规则何时可由其他规则引用。Gets or sets whether a rule can be activated for recognition and when the rule can be referenced by other rules.

 property System::Speech::Recognition::SrgsGrammar::SrgsRuleScope Scope { System::Speech::Recognition::SrgsGrammar::SrgsRuleScope get(); void set(System::Speech::Recognition::SrgsGrammar::SrgsRuleScope value); };
public System.Speech.Recognition.SrgsGrammar.SrgsRuleScope Scope { get; set; }
member this.Scope : System.Speech.Recognition.SrgsGrammar.SrgsRuleScope with get, set
Public Property Scope As SrgsRuleScope



设置规则范围的值。A value the sets the scope for the rule.


下面的示例创建一个语法,用于识别 "已赢得世界杯的国家" 的短语,后跟赢得世界杯的国家/地区的名称。The following example creates a grammar that recognizes the phrase "A nation that has won the World Cup is" followed by the name of a country that has won the World Cup. 它将创建一个名为的公共规则 WorldCupWinner 并将该规则的作用域设置为 "公共"。It creates a public rule named WorldCupWinner and sets the scope of that rule to Public.

// Create an SrgsDocument, create a new rule and set its scope to public.  
SrgsDocument document = new SrgsDocument();  
SrgsRule winnerRule = new SrgsRule("WorldCupWinner");  
winnerRule.Scope = SrgsRuleScope.Public;  

// Add the introduction.  
winnerRule.Elements.Add(new SrgsItem("A nation that has won the world cup is: "));  

// Create the rule for the European nations.  
SrgsOneOf oneOfEurope = new SrgsOneOf(new SrgsItem[] {new SrgsItem("England"), new SrgsItem("France"), new SrgsItem("Germany"), new SrgsItem("Italy")});  
SrgsRule ruleEurope = (new SrgsRule("EuropeanNations", new SrgsElement[] {oneOfEurope}));  

// Create the rule for the South American nations.  
SrgsOneOf oneOfSAmerica = new SrgsOneOf(new SrgsItem[] {new SrgsItem("Argentina"), new SrgsItem("Brazil"), new SrgsItem("Uruguay")});  
SrgsRule ruleSAmerica = (new SrgsRule("SouthAmericanNations", new SrgsElement[] {oneOfSAmerica}));  

// Add references to winnerRule for ruleEurope and ruleSAmerica.  
winnerRule.Elements.Add(new SrgsOneOf(new SrgsItem[] {(new SrgsItem (new SrgsRuleRef(ruleEurope)), new SrgsItem(new SrgsRuleRef(ruleSAmerica)})));  

// Add all the rules to the document and make winnerRule   
// the root rule of the document.  
document.Rules.Add(new SrgsRule[] {winnerRule, ruleEurope, ruleSAmerica});  
document.Root = winnerRule;  

创建的语法采用以下形式。The created grammar has the following form.

<grammar version="1.0" xml:lang="en-US" xmlns="" root="WorldCupWinner">  
    <rule id="WorldCupWinner" scope="public">  
        <item> A nation that has won the world cup is </item>  
                <ruleref uri="#EuropeanNations" />  
                <ruleref uri="#SouthAmericanNations" />  
    <rule id="EuropeanNations">  
            <item> England< /item>  
            <item> France </item>  
            <item> Germany </item>  
            <item> Italy </item>  
    <rule id="SouthAmericanNations">  
            <item> Argentina </item>  
            <item> Brazil </item>  
            <item> Uruguay </item>  


作用域的默认值为 PrivateThe default value for scope is Private. 仅可通过来自其包含语法的根规则或从根规则引用的其他规则的规则引用来激活专用规则识别。A private rule can only be activated for recognition by a rule reference from the root rule in its containing grammar or from another rule that is referenced from the root rule. 除非将私有规则声明为其包含语法的根规则,否则无法通过外部语法引用私有规则。A private rule cannot be referenced by an external grammar, unless the private rule is declared as the root rule of its containing grammar.

如果其作用域设置为 Public ,则 SrgsRule 可以通过 SrgsRuleRef 包含语法中对象的引用或外部语法中的规则来激活对象的识别。If its scope is set to Public, an SrgsRule object can be activated for recognition by a reference from a SrgsRuleRef object in the containing grammar or from a rule in an external grammar.