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D:
database
A collection of tables and indexes. The context for all DBMS operations.
数据库：表和索引的集合。数据库管理系统(DBMS)操作的内容。
See also: table, index, schema, DBMS
date editor
A concrete control which supports editing a date value.
日期编辑器：支持日期值编辑的具体控件。
See also: time and date editor
day note
An appointment that has no start or end date-and-time.
·每天记录：没有起始和终止日期的约会。
DBMS
Database management system. The component that controls the organisation, storage and retrieval of data (fields, records and files) in a database.
数据库管理系统：数据库中控制数据组织、存储和获取的组件。
DCD
Data Carrier Detect. An RS232 input line that is generally held high by a modem while a data connection is active.
数据载体检测：在某个数据连接激活状态下，一个RS232输入行往往被modem严格控制。
See also: RS232
DCE
Data communication equipment (e.g. modem).
数据通讯设备：如调制解调器。
See also: DTE
DCN
Disconnect. This command indicates the initiation of fax modem phase E — call release. This command requires no response.
·断开连接的命令，指示传真modem phase E通话初始化进行释放，不需要响应。
default country
The default country is used as the default country to dial to.
电话拨打的缺省国家。
See also: home city
default display time
The time at which, by default, agenda entries are displayed in views.
缺省显示时间：日程条目显示在视图里面的缺省时间。
default document file
The document file in which a file-based application saves data if no filename is given by the user.
缺省文档文件：基于文件的应用程序保存数据时，如果用户未输入文件名则缺省保存在该文件中。
See also: document file
default document file name
The name of an application's default document file.
缺省文档文件名：应用程序缺省文档文件的名称。
See also: default document file
default owning window group
If a window group is closed while it has the keyboard focus, this window group receives the focus, unless the closed window group had called SetOwningWindowGroup(). A window group becomes the default owning window group by calling RWindowGroup::DefaultOwningWindow().
·缺省窗口隶属组：如果一个窗口组在拥有键盘焦点时被关闭，本窗口组将获得焦点，除非已关闭的窗口组调用了SetOwningWindowGroup()。一个窗口组通过调用RWindowGroup::DefaultOwningWindow()成为缺省窗口隶属组。
See also: owning window group
default screen device
A screen device created by CCoeEnv when it is constructed. Typically used as the standard screen device for this application.
缺省屏幕设备：由CCoeEnv构建生成，通常用作本应用程序的标准屏幕设备。
default session path
The default path for the current file server session. Unless changed, it is the default system path.
缺省会话路径：当前文件服务器会话的缺省路径。不改变的情况，缺省会话路径为系统路径。
See also: path
default system path
The path assigned as the session path to new sessions with the file server.
缺省系统路径：文件服务器分配给新会话的路径。
See also: path
deferred loading
The loading into memory of pictures inserted in a rich text object only when they are required to be displayed. The purpose is to reduce the time taken to retrieve a text object and to save memory usage.
延时载入：载入内存区的图片只有在需要的时候才被插入到富文本对象中进行显示。这样做的目的是减少获取文本对象的时间并节省内存空间。
See also: picture, picture header
deleted to-do list
If a synchronised to-do list is deleted, it is removed from the agenda model's list of to-do lists. However, if it cannot be fully removed from the model because it has a positive synchronisation count, then the to-do list is added to the model's list of deleted to-do lists.
已删除待办列表：如果一条同步待办列表条目被删除，它将被从日程模型的代办列表中移除。然而，如果它因拥有一个正的同步计数值而不能被完全地从模型中移除时，该条目将被添加到模型的已删除待办列表中。
See also: synchronisation count
descriptor
A class derived from TDesC, which describes an area of memory used as either a string or some binary data.
描述符：派生自TDesC的类，通过一个字串或者二进制数据来描述某块内存区。
device
File Server : a hardware and software interface which may be associated with a volume, and which has one of the letters A through Z assigned to it.
设备：文件服务器，硬件或者软件的接口，通常与一个卷关联，分配A到Z中的某个字符作为标示。
See also: volume
device area
The area of the graphics device to which drawing can be done, (if no smaller clipping region is set in a window graphics context).
设备区：图形设备的某个区域，用来绘制图像，（若窗口图像内容中没有更小的剪切区）。
See also: clipping region
device password dialog
Dialogs that allow the user to enter or change the device password.
设备密码对话框：允许用户输入或者更改设备密码的对话框。
DFC
Delayed Function Call. A function that is called after all interrupt service routines have been called but before execution returns to application code. May be "scheduled" by ISRs to perform services for them.
延迟的函数调用：某函数在所有中断服务例程都调用过之后，执行结果返回之前被调用。可被ISR"调度"并为自己提供服务。
DFRD
Device Family Reference Design. All products from the same DFRD are able to run the same third party software, content and services. From v7.0 onwards, this term is no longer used.
设备族参考设计：相同DFRD下的产品可运行相同的第三方软件、内容和服务。v7.0版本以后，本项目不在使用。
dialog
A control, normally invoked by the selection of a menu command, allowing interaction between the user and the program.
对话框：通过对菜单命令的选择激活的控件，为用户和程序提供了交互的接口。
See also: control
digital certificate
An electronic message attachment that is used for security purposes. The most common use of a digital certificate is to verify that a user sending a message is who they claim to be, and to provide the receiver with the means to encode a reply.
数字证书：出于安全目的电子消息附件。通常为了确认该消息的接收者是否正确，并为其提供了加密回复消息的手段。
digital signature
A digital code that can be attached to an electronically transmitted message that uniquely identifies the sender.
数字签名：附加在一条电子传输的消息中，对其发送者进行唯一标示的数字号码。
direct file store
A file based persistent store in which streams can be created and objects externalised to them but, once committed and closed, they cannot subsequently be changed.
直接文件存储：基于永久存储的文件，可创建并具体化文件流，一旦完成或者关闭，文件不能被改变。
See also: file store
directory
Structure containing information on files and subdirectories.
目录：包含了文件和子目录信息的结构。
See also: path
directory entry
Holds information about a file or a directory owned by the directory that contains the entry.
目录入口：保存了属于某个(包括该目录入口的)目录的某个文件或目录的信息。
DIS
Digital Identification Signal. Frame containing the capabilities of the called fax.
See also: DTC
数字化识别信号：包括了呼叫传真功能的结构。
direct screen access
A way of drawing to the screen without using the window server. As this avoids client-server communication, it is much faster.
直接屏幕访问：不使用窗口服务器对屏幕进行描绘的方法。这样避免了客户端同服务器端的通信，速度得到很好提升。
displayable window
A window that can be displayed on the screen. In practice, this means all concrete window classes except window groups.
可显示窗口：可在屏幕上显示的窗口。实际上，这包括了除窗口组外的全部具体窗口类。
dithering
Error diffusion, or dithering, is a way of avoiding aliasing due to a cut-down palette size. If a colour cannot be matched exactly then the nearest colour is used and the difference remembered. Then on the next pixel the difference is added to the desired colour and the result matched to the nearest colour available. In this way a mid-blue, for example, might be represented by a scattering of dark blue and light blue, if that mid-blue were not available in the current palette.
抖动：错误扩散或者称为抖动，是一种防止调色板缩小尺寸时候产生混淆的方法。如果一种颜色无法被匹配，则使用离它最近的颜色代替并记录差异。继而在下一个像素添加该差异到期望的色彩，使得结果趋于理想。例如，使用该方法，如果当前调色板中没有蓝色时，就可能被散射的深蓝色和浅蓝色代替。
DLL
Dynamic Link Library. Dynamic Link Libraries are loaded in response to an explicit API call made by an executing program.
动态链接库：运行中的应用程序从外部通过显式声明的API调用来装载DLL。
See also: dynamic link library, statically loaded DLL, dynamically loaded DLL, API
DLL export table
An area in the DLL which lists the DLL addresses of exported items; In Symbian OS, these items are indexed by ordinal.
DLL导出表：DLL中某个列出其导出项目列表的区域；Symbian OS中，这些项目通过序数索引。
See also: DLL, export, name build, ordinal build
document
Application Architecture : A run-time object containing data associated with a specific instance of an application program. A document may be stored to and restored from a document file.
文档：应用程序的一种架构，实时对象包含了与特定应用程序实例相关联的数据。一个文档可能通过文档文件进行存储和恢复。
Application framework : File-based applications use a document object to provide an intermediate layer between the app UI, the model and the file the model will be stored in. Non-file-based applications will only use a document to create the application's UI.
应用程序框架：基于文档的应用程序使用一个文档对象在UI、模型和模型所在文件之间建立一个中间层；不基于文件的应用程序仅使用一个文档来创建应用程序的UI。
See also: app UI, modelapplication program, document file,
document class
Represents the data model for the application. In file-based applications, it stores and restores the application's data. It handles requests to edit a docuement by creating an app UI.
文档类：表现了应用程序的数据模型。在基于文件的应用程序中，该类用来存储和恢复应用程序的数据。它通过创建一个应用程序UI来处理编辑文档这类请求。
document file
A file that is the externalised form of a main document and any embedded documents it contains.
文档文件：主文档或者任意嵌入其中的文档的外在文件形式。
See also: document
document head stream
A stream directly accessible from the root stream dictionary.
文档头流式文件：从根流式词典可访问的流。
See also: root stream dictionary
document position
A reference to a position in an editable text object. It is an integer ranging from zero (start of document), to the length of document. Depending on the context, a document position either refers to the character indexed by this number, or the point between this character and its predecessor (if any).
文档位置：在一个可编辑文本对象中的一个位置的参考值。是一个从0(文档起始处)到文档长度之间的整数值。依赖于文本内容，一个文档位置或者指向以此数字索引的字符，或者是当前字符和其前继的中间值（如果存在）。
See also: text object
DoIt button
Button command that provides access to a default command.
确定按钮：提供了访问缺省命令的按钮命令。
door
The Symbian OS document embedding mechanism. A door represents an embedded document. There are two types of door: glass doors and iconic doors.
门：Symbian OS中文件嵌入机制。一个“门”代表一个嵌入式文档对象。分为两种：玻璃门和图标门。
See also: document, glass door, iconic door
down event
A Window Server event of type Button1Down, Button2Down or Button3Down. The user actions that result in these events will vary depending on the type of pointing device: mouse, pen, etc.
按下事件：可能为下列窗口服务器事件之一：Button1Down，Button2Down或者Button3Down。用户动作的事件结果通常依设备不同而异。
drag event
An event corresponding to a user's dragging a draggable control.
拖曳事件：用户拖拉一个可拖曳控件时产生的相关事件。
drawing mode
Determines the logical operation used to put pen or brush colour onto the graphics device. Defined in a graphics context.
绘图模式：确定将钢笔或者刷子工具的颜色添加到图形设备上的逻辑操作。在一个图形内容中定义。
See also: pen, brush, graphics device
drive
The letter used to identify one device or volume.
驱动：用来识别设备和卷的字母。
See also: device, volume, path
drive list
The list of volumes that are currently valid.
驱动器列表：当下可用的卷列表。
drive name selector
A type of choice list which allows a drive to be selected from those currently available.
驱动器名称选择器：一种选择列表，允许用户从当前可用的驱动器中进行选择。
DSR
Data Set Ready. An RS232 input line that is taken as an indication we are connected to an active serial port.
数据集就绪：RS232的一个输入行，当我们链接到一个活动的串口时会有该提示。
See also: RS232
DST
Daylight savings time.
夏令时。
DTC
Digital Transmit Command. The command response to the capabilities identified by the DIS signal.
数字化传输命令：该命令对由DIS信号识别的功能进行响应。
See also: DIS
DTE
Data terminal equipment (e.g. computer).
数据终端设备：如计算机。
See also: DCE
DTMF
Dual Tone Multi Frequency (touch tone).
双音多频：电话系统拨号时通过按键按下的事件来通讯。电话键盘上任何一个键被按下时产生两个模拟音调，分别属于行和列。接受方交换机对该信号进行解码并解读出被按下的键码。
A method used by the telephone system to communicate the keys pressed when dialling. Pressing a key on a phone's keypad generates two simultaneous tones, one for the row and one for the column. These are decoded by the exchange to determine which key was pressed.
DTR
Data Terminal Ready. An RS232 output line that can be held high to indicate that our serial port is active.
数据终端就绪：RS232的一个输出行，用来提示我们串口处于激活的状态。
See also: RS232
DUNP
The Bluetooth Dial-Up Networking Profile. It allows a computer to use a Bluetooth cellular phone or modem to make and receive data calls.
蓝牙拨号网络框架：允许一台计算机通过有蓝牙支持的蜂窝电话或者modem来发送和接收数据电话。
duration editor
A control which supports editing a duration value.
持续值编辑器：支持编辑持续值的控件。
See also: time editor, time offset editor
dynamic link library
A library containing functions that are linked and stored separately from the programs that use them.
动态链接库：库文件包含的函数的链接和存储同应用程序相分离。
See also: DLL, statically loaded DLL, dynamically loaded DLL
dynamically loaded DLL
A DLL loaded by another program using RLibrary::Load(). Application programs may not call functions from this DLL directly.
动态载入DLL：其他程序使用RLibrary::Load()装载的DLL。不能直接调用该DLL的函数。
Also known as a polymorphic DLL.
See also: Polymorphic DLL
dynamic navigational link (DNL)
Applications that use the view architecture can allow other applications to send messages specifying a view to display, and possibly relevant accompanying data, called a Dynamic Navigational Link (DNL) message. The ability to request views and send DNLs is provided by the UI Control Framework API's CCoeAppUi class.
动态导航链接(DNL):使用视图架构的应用程序可以让其他应用程序发送消息，指定显示的视图、可能相关的伴随数据，这种消息称做动态导航链接消息。这种请求视图和发送DNL的能力通过UI的控件框架API中CCoeAppUi类提供。
See also: View Architecture
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