非数据描述符最常用于返回一个可调用对象。
The non-data descriptor is likely to be used to return a callable object.
取而代之的是，只有包含关于数据的位置和长度的信息的描述符被追加到了套接字缓冲区。
Instead, only descriptors with information about the location and length of the data are appended to the socket buffer.
当一个文件描述符上数据准备好时，它无法立即响应。
It cannot respond to a file descriptor immediately when the data becomes ready.
在监视器文件的文件描述符仍然打开的情况下，监视应用程序可以从删除的监视器文件读取事件数据，但是不再继续等待事件发生。
Monitoring applications may read event data from deleted monitor files while the file descriptor for the monitor file is still open but may not block for further event occurrences.
这些事件可以是诸如计时器，信号，文件描述符上预备读取的数据，等等。
These events can be things like timers, signals, data ready for reading on a file descriptor, and so on.
一般地，应用程序数据仅包含对应用程序有意义的信息，因为消息描述符中的控制信息就已经足够了。
Generally, the application data only contains information that is meaningful to the applications, since the control information in the message descriptor is sufficient.
卷组中的每个磁盘都有管理数据，包括卷组描述符区域和卷组状态区域。
Each of the disks in the volume group has management data, including a volume group descriptor area and a volume group status area.
注解允许开发人员编写将由相关文件提供的数据，例如单独的部署描述符。
Annotations allow a developer to program data that would otherwise be furnished in a related file, such as a separate deployment descriptor.
有关数据流的细节可在TBSCAN描述符的属性部分中找到。
The details regarding the data flow can be found in the attributes section of the TBSCAN descriptor.
当消息流向V 7版本之前的队列管理器时，除了那些在消息描述符中的属性之外，消息属性都被看作是消息数据并计入消息长度中。
When a message flows to a queue manager prior to V7, properties of the message, except those in the message descriptor, are treated as message data and count towards the length of the message.
执行fork之后，父进程和子进程获得打开的所有文件描述符和数据值的拷贝，所以指针对于它们都是有效的。
After the fork, the parent and child have copies of all open file descriptors and data values, so the pointer works for both.
除了寻址信息之外，嵌入式消息描述符(MsgDesc)也作为消息数据的一部分存储在MQXQH结构内。
Besides the addressing information, an embedded message descriptor (MsgDesc) is stored within the MQXQH structure as part of the message data.
另外，pollset接口只查询繁忙的文件描述符，这减少了内核和用户空间之间传输的数据量。
We have also shown that the pollset interface can effectively reduce the amount of data transferred between kernel and user Spaces because it queries only the busy file descriptors.
通常可以把iocb看作AIO子系统使用的不透明数据结构。然而，如果需要文件描述符的structfile指针，可以通过iocb->ki_flip获取。
The iocb argument can usually be treated as an opaque cookie used by the AIO subsystem; if you need the struct file pointer for this file descriptor, however, you can find it as iocb->ki_filp.
您可以在这里看到Cocoa的便捷性：您只需从数据表获取它的新排序描述符，使用它们来对 CPDictionary 重新排序，然后重新加载数据表。
You can see the convenience of Cocoa at work here: you simply get its new sort descriptors from the table, use them to re-sort the underlying CPDictionary, and then reload the table.
消息描述符和应用程序数据(V 6及之前的所有版本)。
Message descriptor and application data (in versions up through V6).
在部署描述符中指定数据库池。
描述符也可以提供与注释相同的有关实体的元数据信息，如主键字段，以及对象之间的任何映射。
The descriptor can also provide the same metadata information about the entities as annotations, such as primary key field, and any mappings between objects.
信封描述符描述构成此ovf包的所有虚拟机元数据(包括虚拟硬件)。
The envelope descriptor describes all metadata for the virtual machine (s) (including virtual hardware) that make up this OVF package.
在部署过程中，在模块的部署描述符中声明的资源引用将绑定到应用程序服务器配置的数据源。
The resource reference declared within the module's deployment descriptor will be bound to the application server's configured data source during deployment.
接下来，您选择并载入定义OV f信封元数据及其文件的OVF描述符文件。
Next you select and load the OVF descriptor file that defines the OVF envelope metadata and its respective files.
虽然可以采用备用描述符思想，但是单一元数据使它成为一个不引人注意的选择。
Although the idea of alternative descriptors was available, the monolithic metadata made it an unattractive option.
编程人员一般看不见api，因为事务的范围由部署描述符中的声明数据进行描述。
The API itself is usually invisible to programmers, as the scope of transactions is delineated by declarative data found in deployment descriptors.
管道由一个队列和两个文件描述符(一个用于数据入列，另一个用于数据出列)组成。
A pipe is composed of a queue and two file descriptors-one to enqueue data and the other to dequeue data.
其默认的元数据源是注解，但开发者可以通过XML描述符对其进行扩展。
The default metadata source for validations is annotations, but the developers can extend the meta-data through the use of XML descriptors.
这里关键的一点是WebSphere需要EJB部署描述符之外的额外元数据来执行这些映射。
The key point here is that WebSphere requires additional metadata beyond the EJB deployment descriptor to perform these mappings.
此外，还需要有EJB实体bean部署描述符和一个映射文件及数据库模式。
In addition, you need to have EJB entity bean deployment descriptors and a mapping file and database schema.
向 EJBMaker传递XML文件将生成源代码、XML部署描述符和数据库脚本。
Passing the XML file through the EJBMaker generates source code, XML deployment descriptor, and database scripts.
这意味着如果有十个需要访问相同JNDI数据源的会话bean，就必须在部署描述符的每个bean上定义相同的资源引用。
This means that if I have ten session beans that need to access the same JNDI data source, I need to define that same resource reference on each bean in the deployment descriptor.
完成后，该项目将能够处理Web服务元数据，允许使用部署描述符生成器。
Once complete, the project will process web service metadata and allow for I deployment descriptor generators.
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