Glossary

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This page sets out to provide a non-technical reference, together with links for further information or demonstration.

A General Overview

A KDE 4.0 Visual Guide: and a 4.1 screencast give an excellent overview of KDE Software Compilation 4 in the early days.

The following glossary is intended to help you find your way through the mists of new names and new concepts. In some cases you can find a link from a KDE 3 component to its equivalent in the context of KDE SC 4 software.


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:
Creating Activities


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 extensibiliy not possible under KDE3, 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.
More info:
Akonadi for KDE's PIM
Wikipedia - Akonadi
Techbase - Akonadi


aRts
The sound framework in KDE 2 and 3. Its single-tasking nature caused problems when two sources of sound were encountered. In the Plasma desktop it is replaced by Phonon
More info:
Wikipedia - aRts
aRtsHome Page


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 RedHat, it was heavily influenced by KDE3's DCOP, which it supercedes.
More info:
FreeDesktop.org: What is D-Bus?
Wikipedia: D-Bus


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
Tutorials/File_Management The UserBase File Management Tutorial
Extender
Extenders are a special kind of popup that can grow out of a Plasma panel for example. Extenders have detachable parts. Extenders are a new concept that arrived in Plasma for KDE 4.2. The Kuiserver (the interface that collects all long running jobs and puts them into one window) will make use of extenders so you can detach various jobs and monitor their progress separately.
More info:
Mockup Screenshots
The Elements of Plasma


Flake
Flake is a programming library to be used in KOffice2. Functionally, it provides Shapes to display content and Tools to manipulate content. Shapes can be zoomed or rotated and can be grouped towork as a single Shape, around which text flow is possible.
More info:
KOffice Wiki - Flake


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 of GHNS
An article on GHNS in KDE SC 4


Home_Directory
That's the place in 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. And this is easier, when you are keeping your things here.
More info:
wikipedia


KControl
KDE Control Center, for setting global preferences in KDE3. Replaced by KDE4's System Settings interface.


KDOM
A KPart module making KHTML DOM (Document Object Model) rendering capabilities available to all applications. KSVG2 is built on KDOM for KDE SC 4.


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.


Kicker
In KDE 3, the relocatable bar, usually at the bottom of the screen (sometimes called the Panel), on which application launchers, the Pager, and buttons for running applications reside. See Panel


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 can be by 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:
Kickoff Sneak Preview


KJS
KDE platform's JavaScript engine.


KInfoCenter
Kinfocenter originated as part of Kcontrol standing alone from KDE 3.1. In KDE SC 4 it is replaced by modules configured in System Settings, notably Solid
More Info:
Wikipedia - KInfoCenter


KIO
KDE Input/Output framework provides a single API for operating on files, whether local or on aremote 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:
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. Currently it is available in KDE 3 only.


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:
Youtube - KDE SC 4.1 KRunner


KSVG
KSVG enables support for scalable vector graphics in a KHTML browser. KSVG2 extends this for KDE SC 4.


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:
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


Mini-CLI
See KRunner


Nepomuk
'Networked Environment for Personalized, Ontology-based Management of Unified Knowledge', Nepomuk aims to remove artificial barriers between information to allow dynamic classification, organisation and presentation of data to the user. Whether downloaded from the internet, received in an email or scribbled in a note, information is globally searchable and tagged with intelligent data. See The Semantic Desktop for further discussion of this concept.
More info:
Wikipedia - Semantic Desktop
Wikipedia - NEPOMUK Framework
NEPOMUK website
NEPOMUK KDE
Userbase Nepomuk page
Oxygen
Oxygen is the default theme of KDE SC 4. Designed to bring 'a breath of fresh air' to the desktop by removing the simplistic, cartoonish icons, and replacing them with a clean theme and photo-realistic icons. Oxygen uses a desaturated palette to avoid the icons becoming a distraction and uses detailed scalable graphics (SVG).
More info:
Wikipedia - Oxygen Project
Oxygen Icons


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


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:
Wikipedia - Phonon (KDE)
Phonon website


Plasma
In KDE SC 4 the Plasma Desktop replaces KDesktop, kicker and the superkaramba widget engine. The applets are called Plasmoids, and range from informational widgets to mini-apps such as a calculator or dictionary. Widgets from other sources, such as SuperKaramba widgets or Google Gadgets are also supported.
More info:
Wikipedia - Plasma (KDE)
Plasma website
Plasma FAQ
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:
The Qt Toolkit
Qt Demo Videos
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:
Discover Solid
Solid Brings Hardware Configuration and Control to the KDE platform


Soprano
Soprano is a sub-project of |Nepomuk, providing a repository for gathered information such as tags, ratings, etc.. This makes the information available to Strigi
More info:
More about Nepomuk-KDE: Soprano and KDE platform integration


Strigi
A deep-indexed search daemon, Strigi aims to be fast and light-weight. It also uses SHA-1 hash which will help in the identification of duplicate files.
More info:
Strigi - the fastest and smallest desktop searching program
Wikipedia - Strigi


System Settings
KDE SC 4's replacement for KControl (Control Center) providing modular control over the KDE platform.
More info:
KDE SC 4 System Settings illustrated


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:
Why Multithreading? (Technical article)


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 newdesktop 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:
The Webkit home page
Wikipedia - Webkit


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:
Wikipedia - XMLGUI
Wikipedia - Qt Style Sheets


ZUI
The Zooming User Interface. "By zooming out, users can get an overview of all the object groupings that they have made. These groupings may reflect the projects they are working on, be ways to keep different sets of files organized, etc. By hovering or clicking on one of these groups when zoomed out, users can either get a preview/snapshot of what is in the grouping, or zoom in on that grouping so that it is displayed full size on the physical screen." aseigo.
More info:
Youtube ZUI demo



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