Glossary
This page sets out to provide a non-technical reference, together with links for further information or demonstration. See also Jargon File.
Activities
- Activities are sets of Plasma widgets that have their own wallpaper. A bit like Virtual Desktops, but not quite.
- For example you have a "work activity" with commit rss feeds, a note with your TODO, a Folder View with your work related files, and a subtle wallpaper.
- Next to it, you have your "freetime activity", with previews of family photos and dogs, rss feeds from your favourite blogs, a Folder View showing your movie collection, a twitter applet and of course that Iron Maiden wallpaper you have been loving since the early 80s.
- At 1700 hours sharp you switch from the "work activity" to your "freetime activity".
More info:
Akonadi
- The data storage access mechanism for all PIM (Personal Information Manager) data in KDE SC 4. One single storage and retrieval system allows efficiency and extensibility not possible under KDE 3, where each PIM component had its own system. Note that use of Akonadi does not change data storage formats (vcard, iCalendar, mbox, maildir etc.) - it just provides a new way of accessing and updating the data.
- The main reasons for design and development of Akonadi are of technical nature, e.g. having a unique way to access PIM-data (contacts, calendars, emails..) from different applications (e.g. kmail, kword..), thus eliminating the need to write similar code here and there.
- Another goal is to de-couple GUI applications like kmail from the direct access to external resources like mail-servers - which was a major reason for bug-reports/wishes with regard to performance/responsiveness in the past.
More info:
Baloo
- Baloo replaced Nepomuk as a "sematic desktop" search framework. Baloo is a file indexing and search service that Dolphin uses to search for files. In a terminal type,
balooctl checkto find out whether an index was created already.balooctl disableandbalooctl statusare helpful instructions as well.
More info:
Containment
- A Containment is a top level grouping of widgets. Each Containment manages the layout and configuration data of its set of widgets independently from other Containments.
- The end result is that you can group widgets within a Containment according to the significance to your working pattern, rather than by directory grouping.
D-Bus
- An inter-service messaging system. Developed by Red Hat®, it was heavily influenced by KDE3's DCOP, which it supersedes.
More info:
Dolphin
- The default file manager in KDE SC 4. It has a side panel (Places), but navigation is mainly by the breadcrumb trail above the main window. Split windows are possible, and views can be applied to individual windows. Mounting and umounting USB devices can be done in the side-panel. Other directories can be added to the Places panel. A Tree view is also possible.
More info:
- Wikipedia - Dolphin (software)
- Road to KDE 4: Dolphin and Konqueror
- Ars Technica: A First Look at Dolphin
- Youtube - KDE 4 rev 680445 - Dolphin
- Introducing KDE 4 Blog - Dolphin
- The UserBase File Management Tutorial
Flake
- Flake is a programming library to be used in KOffice and Calligra. Functionally, it provides Shapes to display content and Tools to manipulate content. Shapes can be zoomed or rotated and can be grouped to work as a single Shape, around which text flow is possible.
More info:
Get Hot New Stuff
- Get Hot New Stuff (GHNS) is an open standard that makes it easy for users to download and install various extensions for their applications. Our implementation of GHNS is used by Plasma (for example to get new desktop themes), and by many applications and widgets.
More info:
Home Directory
- That's the place in your system where all your files are kept. You can write your files outside of this folder, but all applications are configured to propose this folder as place to write your files to. It is easier when you keep your things here.
More info:
KHTML
- KHTML is the HTML rendering engine for the KDE Plasma desktop, as used by the Konqueror browser. It also provides a KPart that enables all KDE applications to display web content. A new introduction, Qt WebKit is also for Plasma and other application development.
Kickoff
- In KDE SC 4 (and some late versions of KDE 3), a launch menu in which apps are sorted by functional group. "Favorites" replaces the "Most used applications" in Classic Menu, and applications can be added to it. Right-click also offers the possibility of adding applications to the desktop or panel. Rapid access to a less-used application is made possible with the search box. Other menus are being worked on, since KDE SC 4 can be used with more than one launcher, should that be required.
More info:
KJS
- KDE platform's JavaScript engine.
KInfoCenter
- Kinfocenter originated as part of KControl standing alone from KDE 3.1. In KDE SC 4 up until 4.4 it is replaced by modules configured in System Settings, notably Solid, and is being reintroduced as an application in KDE SC 4.5.
More Info:
KIO
- KDE Input/Output framework provides a single API for operating on files, whether local or on a remote server. Additionally, KIO Slaves provide support for individual protocols. Some particularly useful ones are http, ftp, sftp, smb, nfs, ssh (fish), man, tar and zip.
More info:
- A tutorial on file transfers
- Wikipedia - KIO
- Linux.com - Master the KIO slaves
- Breaking the Network Barrier
Kiosk
- Kiosk is a framework for restricting user capabilities on a KDE platform system, ideal for use in locked-down environments such as Internet cafés. It is present in KDE 3 and KDE 4, but the administration tool, Kiosktool is KDE 3 only. It can be used to configure KDE 4 apps, or kiosk configurations can be maintained by editing config files manually.
KPart
- A KPart is an individual component of the KDE Plasma desktop and allows applications to share their services with other applications. KParts allow KMail and KOrganizer to integrate (as plugins) into the Kontact suite, or KHTML to display sites in Akregator.
Kross
- Kross is a scripting framework, enabling support for multiple scripting languages. A plugin system allows for the support of further languages in the future.
KRunner
- The mini-command-line that is accessed from the Classic menu, the keyboard shortcut Alt+F2, or a right-click on the desktop. In KDE SC 4 a partial name will display all possible matches
More info:
KWin
- KWin is the window manager. This is where window decorations can be changed and themes applied. KDE SC 4 extends KWin to provide support for 3D Compositing effects on the desktop.
More info:
- KWin
- Road to KDE 4: KWin Composite
- KDE SC 4 Desktop Effects Video Tour
- Youtube - KDE SC 4.0 KWin Composite Showcast
- Youtube - KWin compositing config & intro
Pager
- A pager is a small program or panel applet which shows the position of windows on your desktop and usually, if you have several Virtual Desktops, gives an overview over all.
Panel
- See Kicker. In KDE SC 4 the name "kicker" is dropped, and the name "panel" is the norm. "Applets"; are largely replaced by Widgets
More info:
Phonon
- A cross-platform multimedia API, interfacing with existing frameworks, such as gstreamer and xine engines. KDE 2 and 3 depended on aRts for sound. Phonon replaces it.
More info:
Plasma
- Plasma is the desktop environment from KDE. It is the part of the desktop that you can see. Plasma also acts as a glue between panels, plasmoids and Kickoff. Plasma Mobile allows Plasma to run on smartphones and uses the same underlying code base.
More info:
- Wikipedia - Plasma (KDE)
- Plasma website
- The Plasma main page
- The Plasma FAQ's
- Youtube - Plasma Applets Galore (Part 1)
- Liquidat's Blog
Qt
- (Pronounced "cute") A framework/toolkit for writing cross-platform applications. It is used by many cross-platform applications such as Opera browser, GoogleEarth and Skype. Qt is developed by Trolltech, who are now part of the Nokia company. Qt forms the underlying library KDE software is built on.
More info:
Solid
- Solid provides a single API for hardware management. Hardware is grouped into "domains". The initial domains relate to HAL, NetworkManager and the Bluetooth stack. Since the backends for Solid are pluggable, Solid helps application developers write less code, and have it platform independent.
More info:
System Settings
- KDE SC 4 replacement for KControl (Control Center) providing modular control over the KDE platform.
More info:
Threadweaver
- This thread programming library spreads work among multiple-core processors where available, prioritising them before queueing them for execution. ThreadWeaver provides a high-level job interface for multithreaded programming.
More info:
Virtual Desktops
- A popular concept of Unix based window managers is the one of virtual desktops. This means you have not only one screen where you can place your windows on but several. When you switch to a different desktop (usually with a pager) you will only see the windows which you started on your new desktop or moved to it. A window can also be made "sticky" which means it appears on all virtual desktops.
WebKit
- HTML rendering engine, originating from a fork of KHTML. Adopted by Apple and developed for Safari. Webkit brings the whole functionality back to KDE SC 4, where it is available through Qt.
More info:
Widget
- Collins English Dictionary: "Any small mechanism or device the name of which is unknown or temporarily forgotten." In KDE software terms, a widget is a single component on the canvas. Other common names that are analogous are "applet" or "gadget". Superkaramba Themes, Apple's Dashboard, Google Gadgets, Yahoo Widgets, Vista Sidebar Widgets, Opera Widgets are all examples of other widget systems (some of which are supported by Plasma as well).
X-Server
- The X-Server represents a basic layer upon which the various GUIs like the KDE Plasma desktop are built. It manages the basic mouse and keyboard input (from the local host as well as from remote hosts) and provides elementary graphic routines to draw rectangles and other primitives.
XMLGUI
- A programmers' framework for designing the user interface. It is extensively used by KParts
More info:
- ← An Introduction to KDE
- Glossary/en