While most of these functions are self explanatory, the Map TAB allow dynamic conditions to be built (using the Expression Builder) that dynamically change the display value of a report element.
大多数功能都是自说明的，映射标签页允许动态构建(使用表达式构建器)，以使得报表元素的显示值可以动态改变。
An XML "value," computed by a query expression, may consist of zero, one, or many items, each of which may be an element, an attribute, or a primitive value.
由查询表达式计算出来的XML“值”，可为零项、一项或者多项，而其中每一项可以是一个元素、一个属性或一个原始值。
Expression — Only examines tree content (element values) returning the result of the expression.
表达式——仅检查返回表达式结果的树内容(元素值)。
The pattern that the text message must correspond to is defined through a regular expression defined through the element in the initialization file.
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。
Besides simplifying element nesting, compact expression also provides a way to reference and reuse policy expressions.
除了简化元素嵌入，紧凑表达式也提供一种引用和重用策略表达式的方法。
The stylesheet starts by matching the root element of the document that it is passed, using the regular expression /*.
样式表将首先使用正则表达式 /*匹配所传递的文档的根元素。
When you select an HTML element, Expression Web also shows a small bubble with additional information, such as size, distance from the left, and distance from the top.
当你选择一个HTML的元素，ExpressionWeb也会显示一个小的提示。比如大小，到左边的距离以及到顶端的距离。
It will iterate over each element of the idx sequence, evaluate the expression, and add the result to the return sequence.
它将迭代id x序列中的每个元素，求得表达式的值，并将结果添加到这个返回序列。
Whatever names they use, they all match the path expression based on their substitution group head element.
不管使用哪个名称，它们都匹配基于它们的代替组head元素的路径表达式。
You can configure the Fan Out mediation primitive to fire its output terminal just once or once for each element obtained using a specified XPath expression.
您可以配置FanOut中介原语，以仅触发其输出末端一次，或对使用指定XPath 表达式获取的每个元素都触发一次。
The expression means "select the element that has no elements earlier in the XML document."
该表达式的含义是 “选择XML文档中较早的不具有元素的元素”。
Listing 4 shows an even simpler XQuery expression, which outputs the number of distinct publishers in the bibliography in a single element.
清单4显示了一个更简单的XQuery表达式，它把书目中不同出版商的数量，在一个元素中输出。
If the BC feature is available, you can set version 1.0 to be in effect for an element with expression evaluation, eliminating worry about type mismatches.
如果支持BC特性，可以设置version 1.0让它在表达式求值的元素中生效，这样就不用担心类型匹配问题了。
Optionally, there can follow an XPath expression prefixed by a backslash to access only a specific element of the message part.
可选地，后面还可以跟着一个前缀为反斜杠的XPath表达式，以仅访问该消息部分的特定元素。
Optionally, there can follow an XPath expression prefixed by a backslash, to access only a specific element of the message part.
可选地，后面还可以跟着一个前缀为反斜杠的XPath表达式，以仅访问该消息部分的特定元素。
Optionally, there can follow an XPath expression to access only a specific element of the message (part).
此外，还可以后跟一个XPath表达式，仅访问消息（部分）的特定元素。
This form only USES csymbols and can be trivially mapped to OpenMath essentially just by changing element names, but preserving the expression structure.
该表单只使用csymbols，基本上只要更改元素名称就可以与OpenMath匹配，表达式结构保持不变。
The XPath expression //Name[1] selects the first element regardless of where it's located in the XML document; however, there is a problem.
XPath表达式 //Name[1]选择第一个元素，无论它位于XML文档中的何处；但是，这里有一个问题。
If the evaluation of the test expression is true and does not result in a dynamic or type error, the element is considered locally valid.
如果测试表达式的计算结果为true并且没有导致动态的或类型错误，那么则认为元素在逻辑上是有效的。
The code in Listing 6 creates an XQuery expression that reaches out to the required element.
清单6中的代码创建了一个到达所需元素的XQuery表达式。
For example, if a data set contains a column for first name and another for last name, using the expression builder you can concatenate the values into one data element.
例如，如果一个数据集具有一个叫做firstname的列，还有一个叫做last name的列，那么你可以利用表达式构建器将二者连接起来组成一个新的数据元素。
The where clause contains a small path expression that navigates from each address to its nested zip element.
where 子句包含一个小型的路径表达式，该表达式从每个地址向下定位到其内嵌的zip 元素。
The snowboard element is attached to the abstract concept of the same name through expression within the schema annotation.
通过在模式注释中表达，snowboard元素被附加到同名的抽象概念中。
A conditional XPath expression needs to be specified on the XML element to specify the validation for the Warning message.
需要对XML元素指定条件XPath表达式来详细描述对警告消息的验证。
However, before you get too far you should realize that an XPath expression can return more than one element.
不过在前进之前要认识到XPath表达式可能返回多个元素。
I've changed the match on the template from / to Invoice so that I don't have to repeat this root element name at the start of each XPath expression.
我将模板匹配从 /修改为Invoice，这样就不需要在每个XPath表达式的开头部分重复根元素名称。
This XPath element specifies an XPath expression that refers to a particular node of the external XML document.
这个XPath元素指定一个XPath表达式，该表达式引用外部XML文档的特定节点。
Once you have the root node of the XML document, you can use a GPath expression (for example, list.user.login.text()) to assert that the element contains the expected value (in this case, suziq).
一旦拥有了XML文档的根节点，您就可以使用GPath表达式（例如 list.user.login.text()）来断言，元素包含预期的值（在本例中为 suziq）。
Finally, the setvalue action tied to the trigger references that same value element in its index attribute, which can take an XPath expression.
最后，触发器的setvalue操作引用其index属性中的相同value元素，index属性可以使用XPath表达式。
The next element is named and represents an XQuery expression for retrieving a set of XML documents from the database that match particular criteria.
下一个元素是，其中指定用于从数据库获取一组与搜索条件匹配的XML文档的XQuery表达式。
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