WCAG2ICT Project: Add 1.4.10 Reflow

[maryjom]

• Analysis of definition: CSS pixel and possible interpretation for non-web documents and software (see Issue WCAG2ICT Project: Update sections - Comments on Definitions in WCAG 2.0 Glossary in Appendix A & sub-sections #22, Issue 1.4.10 Reflow - CSS Pixel Definition / interpretation #162)
• Consider and write up whether there are any notes needed for application of this SC to non-web technologies
  • Guidance and notes for non-web documents (See Issue 1.4.10 Reflow - Guidance & notes for non-web documents #159)
  • Guidance and notes for non-web software (See Issue 1.4.10 Reflow - Guidance & notes for non-web software #161)
  • Any noted problems when trying to apply 1.4.10 to closed functionality software (See Issue 1.4.10 Reflow - Guidance & notes for closed functionality software #160)
• Ensure any concerns logged in other issues tagged with 1.4.10 Reflow are addressed

[maryjom]

From WCAG 2.2 definition of "CSS pixel"

CSS pixel
visual angle of about 0.0213 degrees

A CSS pixel is the canonical unit of measure for all lengths and measurements in CSS. This unit is density-independent, and distinct from actual hardware pixels present in a display. User agents and operating systems should ensure that a CSS pixel is set as closely as possible to the CSS Values and Units Module Level 3 reference pixel [css3-values], which takes into account the physical dimensions of the display and the assumed viewing distance (factors that cannot be determined by content authors).

[maryjom]

See Issue #98.

[maryjom]

NOTE: I've started a discussion thread regarding caveats and thoughts about applying this SC to non-web documents and software.

[maryjom]

Survey opened for initial draft, due 5 April.

[maryjom]

Survey for 2nd draft, due 28 June.

[maryjom]

The TF had a number of consensus decisions regarding the definition of "CSS pixel" in the context of non-web technologies as well as on the notes and guidance for non-web documents and software. The consensus decisions were logged between 8 June and 13 July on the WCAG2ICT decisions WIKI page. The AG WG reviewed 1.4.10 Reflow in the 3rd content review and approved the content on 25 July with the agreement that there would be editor's notes to ask for examples and scenarios where this SC might be impossible to meet.