ISO/IEC 22121-2:2023 情報技術 — 仮想キーボード ユーザー インターフェイス — Part 2: 直接タッチ インターフェイスを備えたオンスクリーン キーボード | ページ 6

3.1

on-screen keyboard

virtual keyboard (3.3) displayed on any type of screen

Note 1 to entry: On-screen keyboards are one specific type of virtual keyboards, probably the most common, that use a screen to display a visual keyboard.

Note 2 to entry: This type of virtual keyboard can be used on personal computer’s screens, on feature phones and tablets, mobile phones and tablets, TVs, kiosks, whiteboards.

3.2

physical keyboard

mechanical or electronic input device using an arrangement of buttons or keys

Note 1 to entry: Some physical keyboards are adaptable (for example, using LCD screens instead of keys with printed symbols and characters).

3.3

virtual keyboard

software alternative to a physical keyboard (3.2)

3.4

associated character

alphabetic character derived from another alphabetic character

Note 1 to entry: Characters can be associated because a diacritic sign is added to it (for example, Ê is associated to letter E) or because of its close relation to it.

Note 2 to entry: For most languages, using associated characters is essential to write properly.

3.7

qwerty-like on-screen keyboard

virtual keyboard layout used for typing in Latin-based languages, with a layout of alphabetical characters similar to the physical keyboard layout from which it is derived (qwerty, qwertz, azerty…)

3.8

prediction

software-generated set of characters, i.e. word, phrase or text, based on user typing that can be selected as next input for faster typing

3.9

group

logical state of a keyboard providing access to a collection of graphic characters (3.13) or elements of graphic characters

Note 1 to entry: A group gives access to one collection of characters. Typically, when more than one language is used, multiple groups are required.

Note 2 to entry: Usually these graphic characters or elements of graphic characters logically belong together and can be arranged on several levels within a group.

Note 3 to entry: The input of certain graphic characters, such as accented letters, may require access to more than one group.

Note 4 to entry: Subsets of a group are called levels.

[SOURCE:ISO/IEC 9995-1:2009, 4.9]

3.10

level

logical state of a keyboard providing access to a subset of a collection of graphic characters (3.13) or elements of graphic characters in a group (3.9)

Note 1 to entry: In certain cases, the level selected may also affect function keys.

Note 2 to entry: With on-screen keyboards, it is usual that only one level be shown per panel at a time.

[SOURCE:ISO/IEC 9995-1:2009, 4.11]

3.11

space key

key associated with character U+0020 SPACE

[SOURCE:ISO/IEC 9995-9:2016, 3.18]

3.12

enter key

key associated with an enter or return function

[SOURCE:ISO/IEC 9995-9:2016, 3.9]

3.13

graphic character

character, other than a control function, that has a visual representation normally handwritten, printed or displayed

Note 1 to entry: Graphic characters with no visual representation can still be used, as per ISO/IEC 9995-7.

[SOURCE:ISO/IEC 9995-1:2009, 4.1, Note 1 to entry added.]

3.14

graphic symbol

visual representation of a graphic character (3.13) , a control function, or a combination of one or more graphic characters and/or control functions

[SOURCE:ISO/IEC 9995-1:2009, 4.14]

3.15

symbol

any graphic symbol (3.14) which is none of a letter, a digit or a punctuation mark

[SOURCE:ISO/IEC 9995-9:2016, 3.24]

3.16

level 2 select

function that, if activated, will change the keyboard state to produce characters from level 2

Note 1 to entry: Level 2 is particularly associated to case in bicameral scripts (for example, scripts which use upper and lower case). Other characters are often displayed at the same time in level 2 when space allows it in the same panel.

Note 2 to entry: By default, level 2 select is activated only for the next keystroke.

Note 3 to entry: Level 2 select may be locked similarly to the capital state lock function.

[SOURCE:ISO/IEC 9995-1:2009, 4.15, modified — Notes 2 and 3 to entry added.]

3.17

group select

function that, if activated, will change the keyboard state to produce characters from a different group

[SOURCE:ISO/IEC 9995-1:2009, 4.13]

3.18

capitals lock state

state that, if activated, will result in the generation of the capital form of all graphic characters (3.13) on the keyboard for which such a form exists

[SOURCE:ISO/IEC 9995-1:2009, 4.7]

3.19

toggle key

on-screen keyboard key that provides a choice of two states

Note 1 to entry: Toggle keys can be used to access a collection of graphic characters.

Note 2 to entry: Toggle keys can provide access to menus for item selection.

Note 3 to entry: Different symbols can be used to display the toggle key status.

3.20

toggle key status

state of the toggle key (3.19) activated by the user

3.21

tap

single consecutive touch and release actions on a touchscreen device, typically it finishes shorter than 500 ms

Note 1 to entry: The touch action can be performed by any part of the human body (usually, the fingers), a pen, stylus, or any other stylus shaped object.

3.22

long tap

single consecutive touch, hold and release actions on a touchscreen device, typically it lasts longer than 500 ms

3.23

layout selection key

on-screen keyboard key used for switching among various on-screen keyboard layouts (3.24)

3.24

keyboard layout

physical, visual or functional arrangement of the keys on a keyboard

Note 1 to entry: Contrary to physical keyboards, on-screen keyboards do not rely on mechanical keys and printed/engraved labels, therefore, their layout can be changed conveniently by the user with the device’s user interface.

Note 2 to entry: Some physical keyboards provide ways to change the visual arrangement of keys (for example, physical keyboards with LCD/LED displayed keys).

Note 3 to entry: An on-screen keyboard layout may give access to one or multiple groups of characters.

Note 4 to entry: Subsets of an on-screen keyboard layout are called groups.

Note 5 to entry: Keyboard layouts could be defined by national, regional or local standards.