But this distinction misses the point that it is processing and aggregation, not the mere possession of bits, that gives the data value.
但这种区别忽略了一点，即正是对信息的处理和收集，而不是仅仅拥有信息，让数据有了价值。
When each data value is unique.
当每个数据值是惟一的时候。
User code that was bound to the data value changes
与数据值变更相关的用户代码
Configuration of a property involves setting a specific data value for the property.
属性的配置将涉及到为属性设置具体的数据值。
First, changing a data value is simple: assign the new value to the appropriate key.
首先，修改数据值是很简单的：将新的值分配给适当的键。
An explicit data value that appears as part of the program is called a constant.
作为程序的一部分，具有明确的数值称之为常量。
In either case, the inner container is used to obtain the key-to-data value mapping.
在这两种情况下，内层容器都用于获得键到数据值的映射。
Some sensors provide only a single data value, while others provide three float values.
有些传感器只提供一个数据值，另一些则提供三个浮点值。
A term, such as n1 and n2 in the expressions from Chapter 2, represents a single data value.
项，比如第二章表达式中的n1和n2，代表了单个的数值。
One way to indicate a data value is to put it inside a subelement; another way is to put it in attribute values.
一种表示数据值的方式是，将数据值放入子元素中；另一种方式是将数据值放入属性值中。
The first attempt at creating a dictionary from a list fails because there are no matching key-data value pairs.
第一次从list创建dictionary的尝试失败了，这是因为没有匹配的键-数据值对。
On the other hand, the iteritems() method lets you iterate through the key-to-data value mappings at the same time.
另一方面，iteritems()方法允许同时遍历键到数据值的映射。
A property is a data value that can be externally configured and affects the business function of the implementation.
属性是可以从外部配置的数据值，会影响此实现的业务功能。
This makes sense because you generally want to know whether a data value — rather than a key value — is in a dictionary.
这是有意义的，因为一般希望知道某个数据值(而不是键值)是否在dictionary中。
You only fill in one data value; after all, you want a computer to do this conversion for you instead of figuring it out.
只需要填入一个数据，毕竟，我们希望计算机来完成这个转换而不是手工计算。
The XPath expression must identify a portion of the XML data — that is, a specific XML node — that returns one data value.
（XPath表达式必须指定XML数据的一部分，即一个 XML节点，它必须返回一个数据值）。
Pre-rendering logic, where Flash Player attempts to determine whether the GUI needs to be updated because of data value changes.
预渲染逻辑，其中FlashPlayer试图确定是否因数据值变更而更新gui。
As shown in Listing 5, you can add new key-to-data value mappings, you can change existing mappings, and you can remove mappings.
如清单5所示，可以添加新的键到数据值的映射，可以修改现有的映射，还可以删除映射。
This operator also extracts the date and time information from a timestamp, populating two relational columns from one XML data value.
该操作符还从时间戳提取日期和时间信息，并用一个XML数据值填充两个关系列。
The input message, shown in Listing 1, provides a data value some_data that is concatenated with an ordinal number to produce each output element.
清单1所示的输入消息提供一个数据值some_data，它与一个序号连接起来生成每个输出元素。
The employee's full name could be displayed in the DropDownList while the EmployeeID could be bound to the control as its underlying data value field.
雇员的全名可以显示在DropDownList中，而EmployeeID可以作为控件的基础数据值字段绑定到该控件。
The data value is enclosed between the element's open tag and either the element's close tag, or the open tag for the next XML element, whichever occurs first.
数据值是元素的开始标记到元素的结束标记或下一个XML 元素的开始标记（以先出现的为准）之间的内容。
The parsing overhead is a result of having to read and evaluate the tags and length fields in the message to determine how to handle the data value following the tag.
解析开销是因为必须计算消息中的标记和长度字段以便决定如何处理标记后面的数据值而造成的。
Consider modifying the plot-latlong data files to read in a variety of factors in addition to data value and location, and you can create many more varieties of maps.
考虑修改plot - latlong数据文件以读入除了数据值和位置以外的各种因素，并且可以创建更多不同种类的地图。
The dictionary is a heterogeneous, mutable container that relies on a key-to-data value mapping, rather than a particular numerical order to access items from the container.
dictionary是一种异构的、易变的容器，依赖键到数据值的映射（而不是特定的数字次序）来访问容器中的元素。
The resolver will connect to the DB2 database and execute the query, passing in an appropriate data value for the query's parameter marker (the name of the referenced entity in the trade).
解析器将连接到DB 2数据库并执行查询，在此过程中，会为查询的参数标记传入一个适当的数据值(即交易中所引用实体的名称)。
These handlers are called throughout the generation and rendering process and allow modification of report properties, like changing font colors, the data value, and calling external code.
我们可以在报表产生和渲染阶段调用这些事件处理器，并且这些事件处理器还能修改报表属性，比如改变字体颜色，数据值以及调用外部代码。
If a significant data value skew exists for a column referenced in a query predicate, make sure that DB2 knows this, preferably by generating column-value histogram statistics using RUNSTATS.
如果查询谓词中引用的列存在显著的数据值倾斜，那么要确保DB 2了解这一情况，最好是使用RUNSTATS生成列值柱状图统计数据。
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