如前所述，每个查询表达式都是泛型的，以表示表达式计算的值的类型。
As I mentioned earlier, every query expression is generically typed to denote the type of the value the expression evaluates to.
路由在模式匹配时使用正则表达式，并且使用XML表示。
Routes make use of regular expressions for pattern matching, and are expressed using XML.
可以使用规则表达式来表示可能会在文本中发现的模式。
We can use regular expressions to express patterns that we may find in the text.
它定义了一种xml语言，可用于定义新类型的词汇表示的正则表达式。
It defines an XML language for defining regular expressions for the lexical representation of new types.
这段代码是程序基本结构的一个例子，我们称之为表示计算结果的表达式。
This piece of the code is an example of an essential programming construct called an expression that represents the result of computation.
方括号(“[”和“]”)包括的表达式表示一些可选项目，是否需要取决于前面的选择。
The expressions surrounded by brackets (" [" and "] ") represent optional items that may be required depending on the previous choices.
抽象语法树是一个表示为对象集合的表达式。
An abstract syntax tree is an expression represented as a collection of objects.
表达式重写通常使用表示特殊情况的内部类。
More often the expression rewrite exploits internal classes that represent special cases.
由括号表示分组：括号中包含的任何子表达式都被看作是用于以后分组或循环的原子。
Grouping is indicated by parentheses: any sub-expression contained in parentheses is treated as if it were atomic for the purpose of further grouping or repetition.
IBMJIT编译器使用一个表达式树序列表示方法的操作。
The IBM JIT compiler USES a sequence of expression trees to represent the method's operations.
错误消息中显示的原因码 “XUTY0008” 表示 “替换表达式的目标节点不是单一节点”。
The reason code "XUTY0008" shown in the error message quickly points you to the fact that "the target node of a replace expression is not a single node".
这（在表达式表示节点集的情况下）允许递增检索节点，而不是立即检索所有节点。
This (in the case of expressions representing node sets) allows the nodes to be retrieved incrementally, rather than all at once.
许多信息都表示为程序可以用正则表达式找出信息的格式。
Much of this information is formatted in such a way that a program can use regular expressions to find information in it.
第一个“非引用”子表达式只表示“查找类似于http或ftp或其它值的字符串”。
The first of these "non-reference" child subexpressions just says "match something that looks like HTTP or that looks like FTP or...".
1(或\ \2)表示模式与匹配表达式的第一个(或第二个)子表达式相匹配。
1 (or \ \ 2) means the pattern matched by the first (or second) subexpression of the match expression.
选择一个日期将生成XPath字面表达式作为函数输入，表示所选的日期和时间。
Choosing a date generates an XPath literal expression as input to the function representing the chosen date and time.
这些参数的值为XPath表达式，并且可以利用表示输入连接的转换变量。
The values of these parameters are XPath expressions and can make use of transform variables representing the input connections.
表示函数应该返回哪个相关对象的表达式。
An expression to represent which related object should be returned by the function.
相关时间或空间表达式的差距，表示空间或时间上的距离或者其中引用的地点或时间。
That part of a relative temporal or spatial expression which indicates the distance between the place or time denoted by it and the place or time referred to within it.
但是，重要的是解析逻辑用正则表达式来表示，因此会通过RegexpPluginAPI实现。
However, what is important is that the parsing logic is delegated to regular expressions and therefore goes through to the RegexpPlugin API.
XPathExpression对象通过将XPath表达式的String表示传递给XPath的编译方法来创建。
XPathExpression objects are created by passing a String representation of the XPath expression into the compile method on XPath.
Ruleset(请参阅清单3)表示一组正则表达式。
Ruleset (see Listing 3) represents a set of regular expressions.
Match （请参阅清单4）表示一个正则表达式。
Match (see Listing 4) represents a single regular expression.
没有表达式树的话，我们是不可能用描述格式来表示一个表达式的。他们唯一的表示方式是IL(中间语言)，这种语言对于重新表述用户的意图来说太低层次了。
Without expression trees, its impossible to describe expressions in a descriptive format; the only description of them is IL, which is too low level to re-create the user's intent for the expression.
它表示一个正则表达式并提供了使正则表达式与字符串相匹配的逻辑。
It represents a regular expression and provides the logic to match the regular expression against strings.
中缀表示法是书写表达式的常见方式，而前缀和后缀表示法主要用于计算机科学领域。
Infix notation is a common way of writing expressions, while prefix and postfix notations are primarily used in computer science.
断言表示为一些布尔表达式，程序员相信在程序中的某个特定点该表达式的值为真。
Assertions represent Boolean expressions that the programmer believes to be true at specific points in the program.
因此可以编写精确的表达式来表示元素和元素值，以及属性、处理指令等等。
So you can write concise expressions that consider not only elements and element values, but also attributes, processing instructions, and so on.
因此可以编写精确的表达式来表示元素和元素值，以及属性、处理指令等等。
So you can write concise expressions that consider not only elements and element values, but also attributes, processing instructions, and so on.
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