因此，应为所有这些可能的输入很好地定义XML查询语言中的每个运算符。
Therefore, each operator in an XML query language must be well defined for all these possible inputs.
简洁性：为了符合其简洁性原则，定义了XQuery运算符的语义，使其包括了某种隐式操作。
Conciseness: in the interest of conciseness, the semantics of the XQuery operators were defined to include certain implicit operations.
XPath不支持函数，但XQuery提供了一批重要的内置函数和运算符，而且还允许用户定义自己的函数。
While XPath doesn't support functions, XQuery provides a substantial collection of built-in functions and operators and also allows users to define functions of their own.
选择orchestrateSchemadefinitions菜单项将开始使用PX运算符导入文件定义或数据库表模式。
Selecting the Orchestrate schema Definitions menu item starts the process of importing the file definition or database table schema using the PX operators.
合并运算符包括SUM、MINUS、PRODUCT、DIVIDE、MAX、MIN和NOP(从虚拟数据集定义的第一个数据集返回数据)。
Merge operators are SUM, MINUS, PRODUCT, DIVIDE, MAX, MIN, and NOP (returns data from the first cube in the virtual cube definition).
操作可以是一个关系运算符，或者系统或用户定义的函数，也可以是一个sql操作符，例如GROUPBY、ORDER BY等。
An operation can be a relational operator, a system - or user-defined function, or an SQL operator, such as GROUP BY, ORDER BY, and so on.
此外，与ContentMathML不一样，对于常见数学运算符没有预定义的元素，因为核心openmath语言只定义基本结构。
Also, unlike Content MathML, there are no predefined elements for common mathematical operators, since the core OpenMath language just defines the basic structure.
当您使用to运算符迭代各个整数时，上下文item(2.0中的上下文item)是未定义的。
As you use the to operator to iterate through various integers, the context item (it's the context item in 2.0) is undefined.
查询无效：确保括号完整，自定义查询只包含有效标准数字以及布尔型运算符and、OR和NOT。
Invalid query: make sure parenthesis are balanced and the custom query consists only of valid criteria Numbers and the Boolean operators and, or, and NOT.
理想情况下，应存在客户研究数据，以支持定义转换运算符。
Ideally, customer research data should exist to support defining a conversion operator.
在规则定义中，DM 3 - ADB加入了时间事件，引入了复合事件运算符，采用DM_SQL语句块定义动作，大大增强了规则的表达能力。
In rule definition, DM3-ADB adds temporal event, supports compound event operators, and USES DM_SQL block to define rule action, which enhances rule expression capacity greatly.
通过定义后缀——运算符可以避免此警告。
This warning can be avoided by defining a postfix — operator.
一个转换运算符的定义，返回您的类或结构的类型。
A definition of a conversion operator that returns the type of your class or structure.
表达式必须有整数类型并且只能包括整数常量，字符常量，以及定义了的运算符。
Expressions must have integral type and can include only integer constants, character constants, and the defined operator.
请确保正在使用的类或结构定义了要使用的运算符。
Be sure the class or structure you are using defines the operator you want to use.
还可以通过使用组合运算符将函数组合在一起来定义新函数。
You can also define new functions by combining functions by using the composition operator.
定义一个迭代器，该迭代器可以向前(通过使用递增运算符)或向后(通过使用递减运算符)访问容器中的元素。
Defines an iterator that can access elements in a container in the forward direction by using the increment operator and in the backward direction by using the decrement operator.
下表汇总了为标准SQL定义的搜索条件运算符。
The following table summarizes search condition operators that are defined for standard SQL.
提供指向介绍如何在查询中使用表达式、在查询中可以包括哪些逻辑运算符以及如何在查询中包括用户定义函数的主题的链接。
Provides links to topics such as how to use expressions in queries, what logical operators, and how to include user-defined functions in queries.
转换的定义方法类似于运算符，并根据它们所转换到的类型命名。
Conversions are defined like operators and are named for the type to which they convert.
若要在自定义类中重载运算符，您需要在该类中创建具有正确签名的方法。
To overload an operator on a custom class requires creating a method on the class with the correct signature.
不过，可为类型定义隐式转换运算符，这样就可以对这些类型使用赋值运算符。
However, you can define implicit conversion operators for a type, which enable you to use the assignment operator with those types.
不能存在以下情况：相等运算符或不等运算符适用于某类型的实例，却未定义相反运算符。
There are no circumstances where either equality or inequality is applicable to instances of a type, and the opposite operator is undefined.
一元运算符的定义，其中的参数是您的类或结构的类型。
A definition of a unary operator where the argument is of the type of your class or structure.
一元运算符的定义，其中的参数是您的类或结构的类型。
A definition of a unary operator where the argument is of the type of your class or structure.
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