miércoles, 25 de diciembre de 2019


Asqatasun es una herramienta de evaluación de la accesibilidad web de software libre (open source). La descripción de la herramienta dice:
Asqatasun is the leading opensource software for web accessibility (#a11y) since 2007. Built with reliability in mind, it also addresses SEO concerns, and is extensible to any other domain.
Asqatasun provides a huge level of automation and can be included in Continuous Integration thanks to its Jenkins Plugin.

viernes, 20 de diciembre de 2019

Lista de cursos sobre accesibilidad web

En Accessibility Courses hay una lista muy completa de cursos sobre accesibilidad web:

University (Paid)

Private (Paid)

Conferences & Events



Educational Videos


Also refer to the AccessMeetups Twitter list by Web Axe and this other meetup list by Deborah Edwards-Onoro.


Vendor Materials

For More Information

miércoles, 18 de diciembre de 2019

Metadatos sobre accesibilidad

En la página Publication Manual of the American Psychological Association (pero supongo que ocurrirá también en otras páginas de esta editorial) he encontrado algo muy interesante:

Parece que hace uso de Schema.org para indicar las características de accesibilidad. En concreto, las propiedades de CreativeWork:

ccessModeText The human sensory perceptual system or cognitive faculty through which a person may process or perceive information. Expected values include: auditory, tactile, textual, visual, colorDependent, chartOnVisual, chemOnVisual, diagramOnVisual, mathOnVisual, musicOnVisual, textOnVisual.
accessModeSufficientItemList A list of single or combined accessModes that are sufficient to understand all the intellectual content of a resource. Expected values include: auditory, tactile, textual, visual.
accessibilityAPIText Indicates that the resource is compatible with the referenced accessibility API (WebSchemas wiki lists possible values).
accessibilityControlText Identifies input methods that are sufficient to fully control the described resource (WebSchemas wiki lists possible values).
accessibilityFeatureText Content features of the resource, such as accessible media, alternatives and supported enhancements for accessibility (WebSchemas wiki lists possible values).
accessibilityHazardText A characteristic of the described resource that is physiologically dangerous to some users. Related to WCAG 2.0 guideline 2.3 (WebSchemas wiki lists possible values).
accessibilitySummaryText A human-readable summary of specific accessibility features or deficiencies, consistent with the other accessibility metadata but expressing subtleties such as "short descriptions are present but long descriptions will be needed for non-visual users" or "short descriptions are present and no long descriptions are needed."

Podemos encontrar más información sobre esto en WebSchemas/Accessibility del W3C.

lunes, 16 de diciembre de 2019

Deque University

La consultora de accesibilidad web Deque ofrece Deque University, un servicio de enseñanza de la accesibilidad web. Entre sus cursos aparece:

  • Fundamentals:
    • Accessibility Fundamentals: Disabilities, Guidelines, and Laws
    • Designing an Accessible User Experience
    • Basic Web and Document Accessibility for Content Contributors
    • Section 508: Fundamentals of the Law and Technical Standards
  • IAAP CPACC (Certified Professional in Accessibility Core Competencies) Exam Preparation:
    • IAAP CPACC Certification Preparation Course
  • Web Accessibility:
    • Semantic Structure and Navigation
    • Images, SVG, and Canvas
    • Visual Design and Colors
    • Responsive Design and Zoom
    • Multimedia, Animations, and Motion
    • Device-Independent User Input Methods
    • Form Labels, Instructions, and Validation
    • Dynamic Updates, AJAX, Single Page Apps
    • Custom JavaScript/ARIA Widgets
    • Web Accessibility Testing: Screen Readers
    • Web Accessibility Testing: Basic Methods and Tools
    • Web Accessibility Testing: WCAG Conformance Testing, Detailed Methodology
  • Document Accessibility:
    • Basic Web and Document Accessibility for Content Contributors
    • MS Word Accessibility
    • MS PowerPoint Accessibility
    • MS Excel Accessibility
    • InDesign Accessibility
    • PDF Accessibility
    • EPUB Accessibility
  • Accessibility Management:
    • Accessibility Program Management
  • Native Mobile App Accessibility:
    • iOS Mobile App Accessibility
    • Android Mobile App Accessibility

miércoles, 11 de diciembre de 2019

Sobre el uso correcto de figure y figcaption

En How do you figure? se explica el uso correcto de las etiquetas figure y figcaption:
A figcaption is not a substitute for alt text
Regarding images used within figures, one of the biggest misunderstandings of using a figcaption is that it’s used in place of image alternative text. Such a practice is outlined in HTML 5.2 as being a last ditch effort to convey meaningful information, but only when images are published without an author being able to provide appropriate alt text.
From the guidance of HTML 5.2:
Such cases are to be kept to an absolute minimum. If there is even the slightest possibility of the author having the ability to provide real alternative text, then it would not be acceptable to omit the alt attribute.
A figcaption is meant to provide a caption or summary to a figure, relating it back to the document the figure is contained within, or conveying additional information that may not be directly apparent from reviewing the figure itself.
If an image is given an empty alt, then the figcaption is in effect describing nothing. And that doesn’t make much sense, does it?
Y el artículo realiza un análisis del soporte de estas dos etiquetas por parte de varios lectores de pantalla.

lunes, 9 de diciembre de 2019

Accessibility Conformance Testing (ACT)

Accessibility Conformance Testing (ACT) Rules Format 1.0 es un nuevo estándar del W3C que tiene como objetivo:

ACT Rules Format defines a format for writing accessibility test rules. These rules can then be shared, compared, and implemented by developers of automated testing tools and manual testing methodologies. This contributes to a common set of rules and harmonized interpretation of Web Content Accessibility Guidelines (WCAG). More info is in the ACT Overview at https://www.w3.org/WAI/standards-guidelines/act/

W3C groups are providing vetted testing rules that follow the ACT Rules Format.

viernes, 6 de diciembre de 2019

Análisis del selector de fechas

En Collecting dates in an accessible way se ofrece un análisis exhaustivo de cuál es la mejor forma de seleccionar una fecha en una página web:
Currently, providing a usable and accessible method for collecting dates in forms is fraught with difficulty. Due to the lack of consistent and accessible support for input type=”date”, and the difficulty of finding date-pickers that are accessible to keyboard users and screen reader users, is it safest to just go back to using text boxes and dropdowns?
I believe you must include the include the ability for the user to enter a date using a text box or dropdowns – for keyboard-only users and screen reader users this is still the best and easiest option.
However, as we’ve seen, many people like date-pickers, including people with some disabilities, so if you wish to present a calendar-style date-picker:
  • never force people to use it, but instead have it as an option triggered by a button, and
  • hide the date-picker from screen reader users.

miércoles, 4 de diciembre de 2019

Día Internacional de las Personas con Discapacidad

Ayer, 3 de diciembre, se celebró el Día Internacional de las Personas con Discapacidad.

Para celebrarlo, el W3C anunció la apertura de su curso Introduction to Web Accessibility, ofrecido en la plataforma edX. El contenido del curso es:

This course is based on the open curricula from the W3C Web Accessibility Initiative (WAI).
Module 1: What is Web Accessibility (2 sections)
  • Introduces the broad scope of digital accessibility through real stories of people with disabilities
  • Examples of how accessibility impacts the lives of interacting in the digital world
Module 2: People and Digital Technology (5 sections)
  • Explores how people with different disabilities use various assistive technologies and adaptive strategies
  • Introduces accessibility barriers and accessibility solutions
  • Explores how design decisions impact interactions
  • Explains the essential components of web accessibility
Module 3: Business Case and Benefits (2 sections)
  • Presents direct and indirect return of investment and the organizational business case
  • Explains the broader benefits for everyone, with or without disability
Module 4: Principles, Standards, and Checks (5 sections)
  • Covers international accessibility standards from W3C Web Accessibility Initiative (WAI)
  • Explains the guiding principles of web accessibility: Percievable, Operable, Understandable, and Robust (POUR)
  • Guides through first steps in checking accessibility and applications
Module 5: Getting Started with Accessibility (2 sections)
  • Explains approaches for integrating accessibility into your design and development processes
  • Provides tips to get started with accessibility right away

lunes, 2 de diciembre de 2019

Accesibilidad de las imágenes en textos digitales (LS)

Se ofrecen recomendaciones para asegurar la accesibilidad de las imágenes en los textos digitales.