datatypes包还定义了DatatypeConstants 工具类，以常量定义了基本的数据类型值。
The javax.xml.datatypes package also defines the DatatypeConstants utility class that contains basic data type values as constants.
一般来说，数据挖掘算法中涉及数据可以归为三种基本的数据类型：人口统计学数据、个体行为数据、心理或态度数据。
In general, there are three kinds of data source types, i. e., demographic data, in-dividual behavioral data and the psychographic or attitudinal data.
基本数据类型的大小。
因为常量对于构造表达式非常的重要，所以学会书写每种基本数据类型的常量就显得至关重要了。
Because constants are an important building block for constructing expressions, it is important to be able to write constant values for each of the basic data types.
对于这个场景，可以直接从逻辑模型中导出基本数据类型，作为XML开发的起点。
For this scenario, it can be useful to export the base data types directly from the logical model as a starting point for XML development.
XML数据类型的基本CRUD操作。
这些示例查询的结果都相当简单，因为fax元素是基于基本数据类型的。
The results of the sample queries are relatively simple because the fax element is based on a primitive data type.
然而，CMP实体bean生成的基本CRUDsql语句是不能修改的，这使得我们不可能采用XML数据类型。
However, the basic CRUD SQL statements generated by CMP entity beans cannot be modified, which would make it impossible for us to adopt the XML data type.
表3对x86上的Linux和SPARC上的Solaris这两者的基本数据类型进行了比较。
Table 3 compares base data types for Linux on x86 and Solaris on SPARC.
它们简化了在单一数据类型上执行基本的创建/检索/更新/删除（Create/Retrieve/Update/Delete，CRUD）操作。
They facilitate basic Create/Retrieve/Update/Delete (CRUD) operations on a single datatype.
可以将属性类型定为基本类型(例如，Integer或String)或复杂数据类型(例如，用户定义的类型，如Order和CreditCard)。
The attribute types can be basic (for example, Integer, String) or complex data types (for example, the user-defined types like Order and CreditCard).
被测试的数据类型将会更加广泛(主要包括目前W3C推荐的XML模式规范定义的一整套基本类型)。
A wider spectrum of data types will be tested (essentially covering the full set of basic types defined in the XML Schema specification, which is now in W3C Recommendation status).
现在，看看如何访问基本数据类型和派生数据类型的参数。
Now, take a look at how to access basic and derived data types of arguments.
派生数据类型是已有的基本类型或其他派生类型的一个派生物或结构。
A derived data type is a derivative or structure of existing base types or other derived types.
尽管许多数据类型和基本的表达式是相同的，但是它们的用法和应用不太一样。
Although many of the data types and fundamental expressions are the same, their use and application is slightly different.
另一种常见的情况是端点只接受对象，而不接受基本数据类型。
Another common one is an endpoint that only accepts objects, and rejects primitive data types.
数据工厂会在缺省情况下提供一个数据类型基本集，可表示大部分编程语言的标准原语。
A basic set of DataTypes representing the normal primitives of most programming languages is provided by default with a data factory.
这种组合不可避免地使许多程序员忽视了数据类型(如整型和浮点)和基本数据结构(如列表和映射)的缺陷。
The combination was irresistible enough that programmers could overlook the lack of data types like int and float and basic data structures like lists and maps.
尽管这里只简要介绍了数据类型，但是我们希望让您对基本数据类型和操作有足够的了解。
Although this has been a top level flight over the data types, hopefully it will give you enough to understand the basic types and operations.
清单4显示了我们将会写入到记录存储中的基本数据类型。
Listing 4 shows the primitive data types we'll write to the record store.
元数据类型的属性进一步描述了基本属性集之外的内容状态。
The metadata types have properties that further describe the state of the content beyond the base set of properties.
最基本的解析器功能支持的数据类型不多，因此处理不规则或少见的数据(经常会遇到这种情况)成为最主要的困难。
The most basic parser functionality doesn't support a wide array of data types; therefore, irregular or unusual data, which is common, is a primary source of difficulty.
这种类型的错误是这样产生的：定义的某些基本例没有被给出它们自己的类，然后以这种方法定义了一个递归的数据类型。
Bugs of this sort result from defining a recursive datatype in such a way that certain base cases of the definition are not given their own classes.
基本数据类型的映射是很直接的。
原因：定义的某些基本例没有给出自己的类，然后以这种方法定义了递归数据类型。
Cause: The recursive datatype is defined in such a way that certain base cases of the definition are not given their own classes.
OMGIDL为您提供了定义您自己的类型的能力，这可以帮助减少复杂程度并且让您可以根据基本类型组成更精巧的数据类型。
OMG IDL provides you with the capability to define types of your own that will help hide some of the complexity and allow you to compose more sophisticated data types from the fundamental data types.
通常关于基本数据类型之间关系的假设在64位数据模型上都已经无效了。
Common assumptions about the relationships between the fundamental data types may no longer be valid in a 64-bit data model.
基本数据类型与另一个相同的基本数据类型兼容。
A base data type is compatible with another of the same base data type.
为了高效地管理XML数据，像传统的SQL数据类型一样，DB 2在内部使用XML数据模型作为逻辑数据模型，同时也作为物理存储的基本单元。
To efficiently manage XML data, like traditional SQL data types, DB2 USES the XML data model internally, as the logical data model and as the fundamental unit of physical storage.
SQL- 92包括DECIMAL数据类型，它是用于表示定点小数的精确数字类型，它可以对小数进行基本的算术运算。
SQL-92 includes a decimal data type, which is an exact numeric type for representing fixed point decimal Numbers and performs basic arithmetic operation on decimal Numbers.
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