The extent to which products, systems, services, environments and facilities can be used by people from a population with the widest scope of use-related needs, characteristics and skills to be able to achieve identified objectives in identified use contexts (EN 301 549 v3.2.1:2021)

Accessible methods of access include construction and other facilities, methods of transport, technical objects, information processing systems, acoustic and visual information sources and communication devices and other designed areas of life, if they can be found, accessed and used by persons with disabilities in the usual way, without any particular difficulties and in general without assistance from others. In this respect, the use of necessary auxiliaries due to disability is permitted (Section 4 of the BGG).

Programmatically interpretable characteristic of a UI element that has the purpose of the more detailed description of the UI element for assistive technology

Name; Programmatically interpretable characteristic of a UI element that has the purpose of the labeling of the UI element for assistive technology

The ability to move from one UI element group to another with the use of the keyboard

AT; Product, system, hardware or software which is used to enhance, maintain or improve the functional skills of people (EN 301 549 v3.2.1:2021)

Examples: Screen magnifier, screen reader, text-to-speech software, speech recognition software, alternative keyboards and pointing devices ( assistive technology - Web Content Accessibility Guidelines (WCAG) 2.2 ( (External Link))(

Software which can be used to create or edit content (EN 301 549 v3.2.1: 2021)

„“Completely Automated Public Turing test to tell Computers and Humans Apart” Program that protects websites from bots by generating and evaluating tests that people are able to pass but current computer programs are not ( Official CAPTCHA page (External Link))

The area of the user interface which is activated by a pointer device (e.g. a mouse) (DIN EN ISO 9241-161:2016)

Functionality which is restricted by specific features that prevent the connection, installation or use of assistive technology (EN 301 549 v3.2.1:2021)

Series of color assignments for the presentation of UI elements (DIN EN ISO 9241-171)

Help text that contains information about the function which is currently being run

Note: Unique labels can be used as context-sensitive help.


Also scrolling text or text block; continuous text of an article without a heading, table or equivalent; Text with more than one sentence (WCAG 2.1, Understanding SC 1.4.8)

Evaluation of the difference between two immediately adjacent or sequential impressions (luminance contrast, brightness contrast, color contrast, etc.)

Here: Measurement value for the presentation of the maximum relative brightness differences between two colors

Control, operating element;

UI element with which users are able to interact, such as the keyboard or a pointing device

Examples: Links, buttons, form fields

UI element which, in contrast to defined UI elements of the programming language (standard elements), can be created by development teams with full functionality

The detailed labeling for a UI element (input field, display field, a table, a control element or an object)

This refers to both the RETURN and ENTER keys on the numeric keypad

Code or abbreviation for a menu item or the label of a control element (usually on the left) which is highlighted next to the name and entered when selected (DIN EN ISO 9241-171:2008)

A series of two opposing changes in relative luminance. If the changes are big enough and occur at the correct frequency, they pose the risk of triggering seizures in some people. ( general flash and red flash thresholds - Web Content Accessibility Guidelines (WCAG) 2.1 ( (External Link))

Position cursor;

Display that shows which UI element has the keyboard focus (DIN EN ISO 9241-171:2008) For example: Keyboard focus indicator: visual display of where the user interaction with the keyboard (or keyboard emulator) will take place (DIN EN ISO 9241-171:2008)

structured presentation of fields and other UI elements that users read, fill out, for which they select or modify entries (DIN EN ISO 9241-161:2016)

UI element which is used for entering or selecting values in form dialogs (also buttons)

fixed end-of-line marking which is interpreted as a paragraph (pilcrow, symbol: ¶) (automatic line break – Wikipedia)

The area of the user interface which responds to an overlying pointer (DIN EN ISO 9241-161:2016)

Desktop application that uses Web technologies for the presentation of the user interface

Text which is rendered in a non-text form (e.g., an image) to achieve a particular visual effect ( image of text - Web Content Accessibility Guidelines (WCAG) 2.1 ( (External Link))

The part of an option name or the label of a control element which is used for a keyboard selection (DIN EN ISO 9241-171:2008)

For example „Print“

here: Keyboard interface;

Interface which is used by the software for the receiving of keystrokes ( keyboard interface - Web Content Accessibility Guidelines (WCAG) 2.1 ( (External Link))

current assignment of the input made on a keyboard or keyboard equivalent to a UI element (DIN EN ISO 9241-171:2008)

The ability to move from one UI element to another within an interactive system with the use of the

Key shortcut, key combination, keyboard combination, keyboard command, keyboard equivalents, key sequence, access key, hot key, shortcut

Keys and key combinations which provide access to functions that are usually activated by means of a pointing device, voice input, or through other input or control mechanisms

A short designation or heading for a UI element (for example, an input field or display field, a table, a control element or an object) (see also DIN EN ISO 9241-171: 2008)

The ability to move from one UI element to another within a single user interface and to move within an interactive system (DIN EN ISO 9241-161:2016)

Content which is not a sequence of letters determinable by software, or in the case of which the sequence does not express anything in human language (EN 301 549 v3.2.1:2021)


  • Captcha
  • Sound
  • Graphic
  • Vibration
  • ASCII-Art

Functionality which supports the access through assistive technology (EN 301 549 v3.2.1:2021)

A collection of software components which is run on an underlying software or hardware layer, and which provides a set of software services to other software components through which these applications can be isolated from the underlying software or hardware layer (EN 301 549 v3.2.1)

Examples: An operating system, device drivers, window systems and software toolkits (DIN EN ISO 9241-161)

Note: A browser can function both as an application and as platform software. (DIN EN ISO 9241-161)

Graphical symbol whose position on the screen is changed according to the movement of a pointing device, and whose shape can be adjusted depending on the control element which is situated beneath it (DIN EN ISO 9241-171:2008)

Pointing instrument;

An auxiliary which converts an operational step of the user into a step that is displayed on the screen

Note: Depending on the technology used, both mechanical auxiliary products and parts of the human body (e.g. fingers, arms) can be used as pointing devices. (DIN EN ISO 9241-171:2008)

Keyboard navigation in which navigation steps are skipped to enable the efficient operation

An event that a) occurs at the same time as it is viewed, and b) is not entirely generated by the content

For example: “Web cast” of a live performance, online auction (real-time event (Web Content Accessibility Guidelines (WCAG) 2.0) (

UI element type for user interfaces;

Characteristic which serves as a known identifier, indicating the type of UI element;

Client applications, especially assistive technology, use the characteristic in order to identify the functions of a control element and to determine how to interact with it

Assistive technology for the individualizing of the visual display

Frequent functions are:

  • Zoom
  • Color adjustment
  • Highlighting of the focus indicator, text cursor and mouse pointer
  • Reading out of text
  • Linearized presentation of text with freely selectable font styles/sizes

Assistive technology which enables users to use software without having to see the visual display (DIN EN ISO 9241-171:2008)

The UI elements are output acoustically by speakers or headphones and on a tactile basis with the use of a Braille display.

The input and control takes place with the keyboard or the Braille display. The inputs are initially processed by the screen reader before being forwarded to the user interface.

Mnemonic, menu accelerator, accelerator key, shortcut keys

Keys and combinations of keys for initializing a menu option without displaying the corresponding menu with the option or intermediate menus on the screen

For example: Save (ALT + S)

  • S = shortcut key – only works when the menu is open and has the focus
  • ALT + S = keyboard shortcut – always works (unless the function is temporarily disabled)

An internal page link to skip areas of content during the keyboard navigation

Speech recognition software

Permalink "Speech recognition software"

Assistive technology for the input of text (dictation) or control commands for the running of control elements

An alternative method of input for the mouse or keyboard interface

UI elements that are defined by the programming language by default


dynamic characteristic which expresses the characteristics of a UI element which is able to change in response to actions by the user or automated processes

The status does not affect the nature of the UI element, but represents data which is assigned to the component or user interaction capabilities

Examples: focused, selected, pressed, highlighted, operable/disabled, correct/incorrect and open/closed, read-only

Change in content which is not a change in context, and provides users with information about the success or outcome of an action, the waiting state of an application, the progress of a process, or the presence of errors ( status message - Web Content Accessibility Guidelines (WCAG) 2.2 ( (External Link))

Support services include, but are not limited to: Help desks, call centers, technical support, mediation services and training (see also EN 301 549: 12.2.1)

Text indicator;

visual display of the current cursor for the text input (DIN EN ISO 9241-171:2008)

All components of an interactive system (software or hardware) that provide users with information and control elements in order to be able to perform specific work tasks with the interactive system (DIN EN ISO 9241-171:2008)

User interface element

User interface element; elementary component of the user interface which is displayed or otherwise presented to the users by the software (DIN EN ISO 9241-171:2008)

Software which retrieves and displays content for users (EN 301 549 v3.2.1:2021)

Individualization, customization;

The modification of the interaction and the presentation of information in order to respond to the individual abilities and requirements of the user (DIN EN ISO 9241-171:2008)

Form elements have a value which is communicated when the form is submitted. In an input field, the value is the entered text. In a selection list, the value is the selected option.

The virtual cursor is a mode of the screen reader. It is used, for example, in order to read Web pages in a Web browser (unless they are marked with role=application), PDF documents in a PDF reader, or content in hybrid desktop software. Although it is not visible like the mouse cursor, the virtual cursor simulates an insertion point, and offers the same functionality as when reading a text-based document.

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