It provides guidance on specific accessibility settings.

It specifies how to access and operate the accessibility setting mode, and how to directly activate specific accessibility features.

This Standard applies to all operating system user interfaces on computers, but can also be applied to other types of information/communication technology, where appropriate.

This Standard does not apply to the user interface before the operating system is loaded and active.

NOTE 1 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows:

ISO/lEC 24786: 2009 Information technology-User interfaces-Accessible user interface for accessibility settings (IDT)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

NOTE 2 In this Standard, requirements or recommendations for the user interface of computer is sometimes referred to simply as requirements or recommendations for the computer.

NOTE 1 There are many secondary users of audio description, but the primary and intended users of audio description are blind persons or persons with low vision and their friends and family.

ISO/IEC TS 20071-21:2015 provides guidance on the subjective nature of creating audio description.

It also provides guidance for audio description developers (script writers, voice narrators, and organizations or groups responsible for delivering audio description) in faithfully and accurately representing audiovisual content.

NOTE 2 It might not always be possible to provide an equivalent experience due to limitations in the amount of time available for audio description depending on the content being described.

ISO/IEC TS 20071-21:2015 applies to describing audiovisual content and does not consider the devices or transmission mechanisms used to deliver the content or the audio description. These devices include, but are not limited to, televisions, computers, wireless devices, projection equipment, DVD and home cinema equipment and other forms of user interface technology. Therefore, this part of ISO/IEC 20071 does not consider transcoding files for the various video outputs.

NOTE 3 Technical matters of transmission and distribution are covered by other International Standards (e.g. MPEG standards and other technical international standards such as IEC 62731).

ISO/IEC TS 20071-21:2015 provides guidance on how to approach user preferences, available styles and flexibility in approaches to audio description.

It does not apply to static images contained in electronic documents (see ISO/IEC 20071-11 for guidance on text alternatives for images).

It applies to auditory presentations intended to be transmitted or delivered simultaneously to the original audiovisual content.

NOTE 4 Limitations experienced by broadcasters or people in synchronous environments might be reduced online or in asynchronous environments.

ISO/IEC TS 20071-25:2017 applies to making captions/subtitles and other on-screen text accessible to users with various needs, including but not limited to people with learning and reading disabilities, people with cognitive disabilities, people who are blind or have low vision, older people, and non-native language speakers. It does not apply to captions/subtitles or other on-screen text whose content is already provided in the soundtrack in a language and a way users can access.

ISO/IEC TS 20071-25:2017 provides guidance on spoken captions/subtitles as a stand-alone access service but it also provides guidance on how to integrate spoken captions/subtitles, other spoken on-screen text and audio description, if needed, in different types of videos.

NOTE 1 Extensive guidance on audio description is provided in ISO/IEC/TS 20071-21.

ISO/IEC TS 20071-25:2017 does not consider the devices or transmission mechanisms used to deliver and play the content or the audio presentation of text in videos. These devices include, but are not limited to televisions, computers, wireless devices, projection equipment, DVD and home cinema equipment, cinema equipment and other forms of user interfaces technology. Therefore, this document does not consider transcoding files for the various video and audio outputs.

NOTE 2 Technical matters of transmission and distribution are covered by other documents (e.g. MPEG standards and other technical standards such as IEC 62731:2013).

ISO/IEC TS 20071-25:2017 acknowledges the various needs and preferences of users, as well as the different approaches to the audio presentation of text in videos.

It applies to audio presentations intended to be heard simultaneously along with the original video.

– initiating the scanning application;

– setting user's preferences and configuring the scanning application;

– identifying the types of information currently of interest to the user;

– locating visual objects of interest to the user;

– creating a static image via scanning the visual object;

– identifying the information content provided by the visual object;

– processing scanned information and outputting the results to the user.

ISO/IEC TS 20071-15:2017 provides increased accessibility by addressing the user accessibility needs of diverse users in diverse contexts.

ISO/IEC TS 20071-15:2017 contains guidance that can be applied to a variety of devices, including:

– specialized devices that are dedicated to scanning and processing visual information;

– mobile devices (such as smartphones and tablets);

– general purpose computers with camera capabilities;

– office machines with scanning functions.

ISO/IEC TS 20071-15:2017 contains guidance that can be applied to various types of software, including:

– stand-alone scanning applications;

– applications including scanning functionalities;

– (scanning) applications that interoperate with other applications.

ISO/IEC TS 20071-15:2017 contains guidance that can be used for outputting scanned information in various modalities, including:

– audio outputs;

– visual outputs;

– tactile outputs;

– storing information for future use within the application performing the scanning;

– electronic outputs (to other applications, systems, or devices including those directly connected and those connected via the Internet).

ISO/IEC TS 20071-15:2017 does not:

– apply to fully automated scanning that is not under direct human control;

– apply to applications that scan visual information for editing an image or just displaying it;

– provide guidance on the design of specific hardware devices involved in scanning;

– provide guidance on the specific objects that can be recognized or the specific software used to recognize these objects;

– provide guidance on the internal functioning of software that recognizes specific types of objects.

ISO/IEC TS 20071-15:2017 is intended for use by developers of applications that include user controlled scanning functionalities. It does not expect that an application includes all of these functionalities. It can be used for those functionalities that an application does provide.

ISO/IEC TS 20071-11:2012 does not apply to moving images (e.g. movies).

The guidance contained in ISO/IEC TS 20071-11:2012 is intended to be used by the person who creates content to be placed in an electronic document. There is no expectation that this person will have any additional expertise beyond understanding the contents of the document and why an image was chosen to be placed within the document.

While the main intent of the guidance within ISO/IEC TS 20071-11:2012 is the creation of text alternatives, the information identified in this guidance could be placed in the main document text, reducing the length of the resulting text alternatives. However, placing information in the main document text does not fully replace the function of having some text alternatives for each image.

example, the syntax of XHTML 1.0 can be specified in RELAX.

Compared with DTDs, RELAX provides the following advantages:

– Specification in RELAX uses XML instance (i.e., document) syntax,

– RELAX provides rich datatypes, and

– RELAX is namespace-aware.

The RELAX specification consists of two parts, RELAX Core and RELAX Namespace. This part of the Technical

Report gives RELAX Core, which may be used to describe markup languages containing a single XML namespace.

Part 2 of this Technical Report gives RELAX Namespace, which may be used to describe markup languages

containing more than a single XML namespace, consisting of more than one RELAX Core document.

Given a sequence of elements, a software module called the RELAX Core processor compares it against a

specification in RELAX Core and reports the result. The RELAX Core processor can be directly invoked by the

user, and can also be invoked by another software module called the RELAX Namespace processor.

RELAX may be used in conjunction with DTDs. In particular, notations and entities declared by DTDs can be

constrained by RELAX.

This part of the Technical Report also gives a subset of RELAX Core, which is restricted to DTD features plus

datatypes. This subset is very easy to implement, and with the exception of datatype information, conversion

between this subset and XML DTDs results in no information loss.

NOTE 1 Since XML is a subset of WebSGML (TC2 of ISO 8879), RELAX is applicable to SGML.

NOTE 2 A successor of RELAX Core is being developed at the RELAX NG TC of OASIS.

ISO/IEC TR 19766:2007 introduces a set of attributes and operations that can be implemented as features of graphic icons to make the functionality of these icons accessible to the widest possible range of users. Textual attributes are emphasized because they can be rendered in various alternate modalities. ISO/IEC 11581-1 provides guidance on the graphic aspects of icons. Specific renderings of these attributes (or of icons in general) are not dealt with as part of ISO/IEC TR 19766:2007.