如果您不定义表达式，则它将标记为错误。
If you do not define the expressions, it will be marked with an error.
如何：使用自定义表达式对值进行汇总或聚合。
How to: Summarize or Aggregate Values Using Custom Expressions.
清单3中的实例修改了AgeValidation_def规则定义表达式，这样就可以使用trim函数。
The example in Listing 3 modifies the expression of the AgeValidation_def rule definition so that it makes use of the trim function.
就如你可能猜想的那样，整数转换优先级用于定义表达式求值的规则。这些规则叫做整型提升和常用算术转换。
As you probably suspect, the integer conversion rank is used to define the rules for expression evaluation. Those rules are named the integer promotions and the usual arithmetic conversions.
这是本例子第一次把关联作为一个定义表达式(换句话说，一个赋值语句)的声明性陈述来使用，而不是用它作模型到模型的映射。
This is the first time that this example is using a relation as a declarative statement to define an expression (in other words, a value assignment) instead of using it for model-to-model mapping.
无论您正在创建一个BPEL过程，还是一个业务状态机，或者是几种其他类型组件中的任意一种，您都需要定义自定义表达式和行为。
Whether you are creating a BPEL process, a business state machine, or any of several other types of components, you need to define custom expressions and behavior.
按照本文的“定义表达式解析器”一节描述的那样在JSF配置文件中使用Spring的DelegatingVariableResolver。
Use Spring's DelegatingVariableResolver in JSF's configuration file as in this article's "Defining an expression resolver" section.
CAMStudio模板编辑器支持向生成模板中添加自定义XPath表达式，不过UI可以定义大多数规则，而无需编写自定义表达式。
CAM Studio template editor supports adding custom XPath expressions to its generated templates but the UI can define most rules without writing any custom expressions.
此列表是作为附加到该筛选器的主题表达式列表定义的。
This list is defined as a list of topic expression attached to the filter.
该模式对象代表以文本格式定义的正则表达式。
This pattern object represents the regular expression that is defined in text format.
用以下表达式定义添加一个新的查询项。
Add a new query item with the following expression definition.
@Pointcut注解允许我们定义切入点表达式，而且必要时，还有被切入点绑定的参数的个数和类型。
The @Pointcut annotation allows us to define pointcut expressions and, where necessary, the number and type of arguments to be bound by the pointcut.
如果相同中介流处理多种消息类型，您可以使用此新原语定义XPath表达式，以将消息指引到不同的终端。
If multiple message types are processed by the same mediation flow, you can use this new primitive to define XPath expressions to direct messages out different terminals.
在AttributeValues下单击add，以便可以定义设置此变量的表达式。
Under Attribute Values, click Add so you can define the expression that sets this variable.
constraint属性包含一个布尔表达式，它定义数据必须符合的条件。
The constraint attribute contains a Boolean expression, which defines the condition to which the data is constrained.
这意味着：XSL处理器查找与
That means the XSL processor looks for XML elements that match the expression defined by the "select" attribute of
简而言之，这表示普通股事实位于实体信息行项目范围内，通过链接到XBRL分类Web资源中的定义可以使表达式更加正式。
This, in short, expresses that the common shares outstanding fact is in the domain of entity information line items, an expression made formal by links to definitions in XBRL taxonomy Web resources.
根据定义，如果表达式值是True，那么test返回零退出值，否则返回非零退出值(即1)。
As stated in the definition, test returns a zero exit value if the expression value was True or a non-zero exit value (that is, 1).
部分名称是在定义XPath表达式时必须输入的字符串。
The part name is the string you have to enter when defining your XPath expression.
从现在起，我们把示例中的定义和表达式写在一块，你把它们怎么放都行。
From now on, we'll write our example definitions and expressions together, and you can put them in whichever area you prefer.
除了一组丰富的标记外，JSTL还定义了自己的表达式语言(EL)。
In addition to a rich set of tags, the JSTL defines its own expression language (EL).
它将末端时间轴里程碑中定义的订阅表达式用作订阅表达式中的订阅过滤器。
It USES the subscribe expression defined in the end timeline milestone as the subscription filter in the subscribe expression.
约束模式[7]是可以被例化并随后配置的，用于简洁地开发约束的预定义的约束表达式。
Constraint patterns 7 are predefined constraint expressions that can be instantiated and subsequently configured for developing constraints in a concise way.
该函数也会正确地处理未定义的值，尽管在警告打开时，常规表达式在匹配未定义的值时会输出警告信息。
It works correctly with undefined values as well, whereas with warnings turned on, a regular expression match on an undefined value will print a warning.
JSF具有用于自定义jsfel表达式中的顶级变量的解析的机制。
JSF has a mechanism for customizing the resolution of top-level variables in JSF el expressions.
文本消息必须符合的模式是通过初始化文件中的元素中定义的正则表达式定义的。
The pattern that the text message must correspond to is defined through a regular expression defined through the element in the initialization file.
正则表达式是定义将要匹配的文本部分的方式。
A regular expression is a way of defining a portion of text to be matched.
第一个方法是使用RFC 4627中所定义的正则表达式确保JSON数据中不包含活动的部分。
The first approach is to use the regular expressions defined in RFC 4627 to make sure the JSON data doesn't contain active parts.
还可以为流程中的业务项定义实际数据值，并使用为决策定义的表达式逻辑。
You can also define actual data values for the business items flowing through the process and use the expression logic you define for the decisions instead.
正则表达式 是定义匹配模式的字符串。
Regular expressions are strings of characters that define a pattern to be matched.
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