1、 Reference number ISO/IEC 24738:2006(E) ISO/IEC 2006INTERNATIONAL STANDARD ISO/IEC 24738 First edition 2006-12-01 Information technology Icon symbols and functions for multimedia link attributes Technologies de linformation Symboles et fonctions dicnes pour les attributs de liens multimdias ISO/IEC
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5、 below. ISO/IEC 2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs memb
6、er body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2006 All rights reservedISO/IEC 24738:2006(E) ISO/IEC 2006 All rights reserved iii
7、Contents Page Foreword iv Introduction v 1 Scope . 1 2 Conformance. 1 3 Normative references . 1 4 Terms and definitions. 1 5 Requirements and recommendations 3 5.1 Requirements 3 5.2 Recommendations 4 6 Icon specifications 5 6.1 General structure of link attribute icons 5 6.2 Temporal attribute of
8、links. 7 6.3 Attributes of destinations of links. 11 6.4 Link history attributes 15 Annex A (informative) Implementation issues for link attribute icons . 17 Annex B (informative) Developers of this technical report 19 ISO/IEC 24738:2006(E) iv ISO/IEC 2006 All rights reservedForeword ISO (the Intern
9、ational Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees establish
10、ed by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the fie
11、ld of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft
12、 International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this d
13、ocument may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. ISO/IEC 24738 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 35, User interfaces. ISO/IEC 24738:2006(E) ISO/IEC 2006
14、 All rights reserved v Introduction Link attribute icon symbols enable users to decide on the suitability of following associated hyperlinks. Information provided by these icon symbols may also be made available via text. This International Standard provides guidance on the graphics to be used by im
15、plementers of ISO 14915-2, Software ergonomics for multimedia user interfaces Part 2: Multimedia navigation and control. The icon symbol graphics included in this International Standard have been selected on the basis of their ability to convey the desired information to a wide audience of users. IN
16、TERNATIONAL STANDARD ISO/IEC 24738:2006(E) ISO/IEC 2006 All rights reserved 1 Information technology Icon symbols and functions for multimedia link attributes 1 Scope This International Standard defines a consistent set of icon symbols and related attributes that are presented on a computer screen a
17、nd with which users interact to decide whether or not to take the associated link. These symbols represent attributes of the link and/or the destination of the link. This International Standard applies to icons that are shown on a computer screen in conjunction with a link also shown on that screen.
18、 It describes user interaction with and the appearance of link attribute icons on the screen. Other forms of icons are covered in ISO/IEC 11581, Information technology User system interfaces and symbols Icon symbols and functions. 2 Conformance A system, application or set of one or more icons confo
19、rms to this International Standard if all link icons available to the user in the system or application conform to subclause 5.1 of this International Standard and to clause 5 and subclause 6.1 of ISO/IEC 11581-1:2000. 3 Normative references The following referenced documents are indispensable for t
20、he application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 14915-2:2003, Software ergonomics for multimedia user interfaces Part 2: Multimedia navigation and cont
21、rol ISO/IEC 11581-1:2000, Information technology User system interfaces and symbols Icon symbols and functions Part 1: Icons General ISO/IEC TR 19766, Information technology Guidelines for the design of icons and symbols accessible to all users, including the elderly and persons with disabilities 1)
22、4 Terms and definitions 4.1 application collection of functions with which a user can perform a task 1) To be published. ISO/IEC 24738:2006(E) 2 ISO/IEC 2006 All rights reserved4.2 link connection among or within media which starts with a control and ends at a specified location NOTE Links may be re
23、presented with text, graphics, or other forms of media. ISO 14915-2:2003, definition 3.9 4.3 fixed link permanent link that can be activated whenever the medium containing the link is presented EXAMPLE 1 The user clicks on an underlined phrase in a Web page and is taken to another Web page. EXAMPLE
24、2 The user clicks on a word and is provided with a description of what the word means. EXAMPLE 3 The user clicks on an animated icon which starts a video presentation. ISO 14915-2:2003, definition 3.9.3 4.4 temporal link link between two anchors in the system that is only available for a certain per
25、iod of time while the medium containing the link is presented EXAMPLE 1 Links to descriptions of characters are made available only while the characters are visible in a video sequence. EXAMPLE 2 A link to descriptive information is available only during the first 20 seconds of viewing a picture. NO
26、TE Temporal links can be due to conditional or time limited constraints. ISO 14915-2:2003, definition 3.9.4 4.5 computed link temporary link, created on demand between two anchors in the system, where the location linked to is dynamically determined based on the state and/or history of the system an
27、d where the link remains available only while needed EXAMPLE The results of a search include several links to different parts of the application that will be replaced by the results of any subsequent search. ISO 14915-2:2003, definition 4.5 4.6 user defined link permanent or temporal link created by
28、 a user during the use of an application that is intended to supplement the links created with the application EXAMPLE The user creates a bookmark to go directly to a given location within an application. ISO 14915-2:2003, definition 4.6 4.7 link attribute property or destination of a link ISO/IEC 2
29、4738:2006(E) ISO/IEC 2006 All rights reserved 3 4.8 icon graphic displayed on the screen of a visual display that represents a function or an attribute of a function of the computer system 4.9 interactive system combination of hardware and software components that receive input from, and communicate
30、 output to, a human user in order to support his or her performance of a task NOTE The term “system” is often used, rather than “interactive system”. ISO 13407:1999, definition 2.1 5 Requirements and recommendations 5.1 Requirements 5.1.1 Graphic and function If an interactive system or application
31、uses a link attribute icon that has the appearance of the icon graphic specified in clause 6 of this International Standard, within the specific variations given, and within the global variations specified in ISO/IEC 11581-1, it shall serve the functions specified in clause 6 of this International S
32、tandard. NOTE A single link attribute icon may combine information on a number of attributes of a link. 5.1.2 Arrangement A link attribute icon shall be grouped together with the link that it clarifies. EXAMPLE The link attribute icon for link composed of a string of text is presented immediately be
33、fore the start of the text. 5.1.3 Selection a) Selection of a link attribute icon shall have the same result as selecting the link that the attribute icon clarifies. b) Selection of a link attribute icon shall be made by indicating with the pointer and activating the associated input device (e.g. cl
34、icking a mouse button). 5.1.4 Visual feedback a) There shall be visual feedback when a link has been invoked via a link attribute icon. NOTE Typically, this involves presenting content from the destination of the link. b) The user shall be informed if content from the destination of the link cannot
35、be presented when a link has been invoked via a link attribute icon. ISO/IEC 24738:2006(E) 4 ISO/IEC 2006 All rights reserved5.2 Recommendations 5.2.1 Control of presentation of link attributes The systems should provide a function to allow the user to control the presentation/hiding of link attribu
36、te icons. 5.2.2 Function and graphic If an interactive system or application uses a link attribute icon that serves the primary function specified in clause 6 of this International Standard, it is highly recommended that it have the appearance of the icon graphic specified in clause 6, within the sp
37、ecific variations given and within the global variations specified in clause 6.3 of ISO/IEC 11581-1:2000. 5.2.3 Presenting textual information about link target When a link attribute icon or the link itself is pointed at but not activated, a pop-up should be used to display further information about
38、 the details of the target of the link (i.e. media type, application, etc.). 5.2.4 Metaphor Information about the following metaphors used in this International Standard may be included in documentation that is provided to users of link attribute icons. a) The basic nature of a link is represented b
39、y three segments (also known as “links”) of a chain. b) The temporal aspect of some links is represented by an hourglass with sand in various positions representing the passage of time in the temporal life of the link. c) The need to load additional content which may overlay the content currently av
40、ailable to the user is represented by a border around the link indicating that this new content is completely new. d) The on-going nature of a link is represented by flashing (as is commonly used in a web browser), or if flashing is not appropriate, by a dashed border that shows that new content wil
41、l continue to be loaded. e) The computed nature of the destination of a link is represented by an equals sign. f) The size of the content to be loaded is represented by a glass with various amounts of liquid in it. g) The visited nature of a link is represented by shading within the segments of the
42、main link attribute icon (which is similar to the use of changed colours for textual links). 5.2.5 Rendering A consistent highlighting or presentation style should be considered which renders the graphic of the symbols sufficiently prominent in comparison with other information on the screen. 5.2.6
43、Colour a) Link attribute icons may be coloured. b) Because the background is significant, the colour of the background should be clearly distinguishable from other colours used in the icon. ISO/IEC 24738:2006(E) ISO/IEC 2006 All rights reserved 5 5.2.7 Cell size Icon cell sizes should be sufficient
44、to allow all the presence or absence of icon components to be accurately perceived. NOTE Icon cell sizes are not required to be square. The sizes shown in clause 6 are relative to the complexity of the design and implementation of the icons. The aspect ratio of the cell sizes are not part of this In
45、ternational Standard. 5.2.8 Text/typeface a) The use of text to accompany link attribute icons should be avoided. b) If text is used, plain typefaces should be used. c) If text is used, it should be used in a manner that supports adaptation for cultural, linguistic and comprehensibility purposes. 5.
46、2.9 Accessibility Link attribute icons should comply with the recommendations of ISO/IEC TR 19766. 6 Icon specifications 6.1 General structure of link attribute icons 6.1.1 Use of a single link attribute icon A single composite icon shall be used to represent a combination of link attributes. NOTE T
47、he use of multiple icons would defeat the usability of icons in presenting attribute information to users. 6.1.2 Constructing link attribute icons A link attribute icon shall be composed of the basic link attribute icon (from clause 6.1.4) plus appropriate additions (from clauses 6.2 to 6.4). NOTE T
48、he combination of all specified additions is illustrated in A.2. 6.1.3 Individual link attribute icons Each link shall have its own corresponding link attribute icon, where appropriate. NOTE For a more detailed functional description refer to ISO 14915-2:2003, clause 8.3. ISO/IEC 24738:2006(E) 6 ISO
49、/IEC 2006 All rights reserved6.1.4 Basic link attribute icon Primary function. To enable the user to recognize the associated link. NOTE For a more detailed functional description refer to ISO 14915-2:2003, clause 8.1. Specific instance. A representation of three segments of a chain. Components. Two open horizontal ovals (or rectangles) are situated near the bottom of the icon horizontally near one another. A horizontal line connects the two ovals (or rectangles) and goes slightly inside of each of the
