W3C

– DRAFT –
WCAG2ICT Task Force Teleconference

29 June 2023

Attendees

Present
bruce_bailey, Bryan_Trogdon, ChrisLoiselle, cwadams, Devanshu, loicmn, maryjom, Mike_Pluke, mitch11, olivia, PhilDay, ShawnT, ThorstenKatzmann
Regrets
Fernanda Bonnin, Sam Ogami
Chair
Mary Jo Mueller
Scribe
bruce_bailey

Meeting minutes

Announcements

maryjom: at ag coordination call, pub of 2.2 progressing...
… CR period closed without any notable objections

maryjom: There might be a WCAG3 draft in july
… also work on charter
… net WCAG2ICT 1st public draft pushed back due to that

chuck: AG has more wcag2ict content to review, but yes August

maryjom: If it goes for publication, will be in july 18 survey for AG

<cwadams> bruce: You are doing great work in the editors draft. Looks great.

<cwadams> maryjo: WCAG2ICT?

<cwadams> bruce: Yes!

maryjom: Agree that PR and builds for WCAG2ICT progressing nicely, and there is more clean up already on deck

<maryjom> • Proposed guidance for definition of “style property”: https://www.w3.org/2002/09/wbs/55145/WCAG2ICT-style-property/

maryjom: There are two new surveys, as I noted missing definition for style definition

<maryjom> • Draft update for SC Problematic for Closed Functionality: https://www.w3.org/2002/09/wbs/55145/wcag2ict-sc-problematic-for-closed/

maryjom: Also this week closed functionality subgroup has completed much of that work, so have a survey for that topic
… survey is open for two weeks since it is longer. Other surveys have just been one week.

maryjom: If we can start with that longer survey, soon. But we are moving through surveys.

maryjom: Next week has a holiday for U.S. and Canada, so what does that mean for us?

<maryjom> Poll: Who can attend next week's WCAG2ICT call?

<cwadams> +1

<ShawnT> +1

<ChrisLoiselle> +1

<Mike_Pluke> +1

<loicmn> +1

<Bryan_Trogdon> +1

<ThorstenKatzmann> +1

<PhilDay> +1

<mitch11> -1

<ChrisLoiselle> out week after on vaca

<mitch11> I'll be on vacation for two weeks starting Monday

<cwadams> +1 for meeting!

maryjom: Seems like quorum, any objections for meeting next week?

maryjom: We will meet next week then as scheduled.

other annoucments?

Project standup and planning

maryjom: New items in ready for task force review...
… i feel like i am bottle neck on the command line bits, but will continue to work on a draft...
… that is a small group, so they will not be able to meet for a couple weeks. So i will do a little work off line and reconvene with sub group
… not on the critical path, so won't slow down 1st public working draft timing...

reflow and target size are on critical path.

Survey results: Review proposed update to SC 2.5.8 Target Size (Minimum)

<maryjom> https://www.w3.org/2002/09/wbs/55145/WCAG2ICT-Target-size-update-note/results

maryjom: We are working on proposed update for note
… in general, folks like note, just editorial feed back

[reads olivia's suggestion]

maryjo: mitch in survey agreed with edits but had concerns for pulling out one technology

mitch11: I don't object to what we have. I just think we could write it a little better, but I do not have suggestion.

[maryjo continues reading from survey]

<maryjom> Some document formats are designed for viewing at a wide range of zoom levels provided by the user agent. However, the commonly available user agents for these formats may lack a consistent base zoom level from which to evaluate this criterion. For such documents, evaluate target sizes at a zoom level that aligns with the intended usage of the content.

maryjom: Again, feedback seems edititorial.

maryjom: I have pasted in a re-write [above]

mitch11: I don't object. I would not that this is the least precise thing we have done. Which is okay! If it was +/- 20% this is +/- 100%
… ton of judgement needed.
… which is why I favored including "best practice"

<maryjom> Draft resolution: Replace existing non-web document note for 2.4.8 Target Size (Minimum) with the above version.

maryjom: we use "best practice else where"

<loicmn> +1

<olivia> +1

<Bryan_Trogdon> +1

<maryjom> +1

<ThorstenKatzmann> +1

<ChrisLoiselle> +1

<ShawnT> +1

<Devanshu> +1

<mitch11> +1

<PhilDay> +1

<Mike_Pluke> +1

RESOLUTION: Replace existing non-web document note for 2.4.8 Target Size (Minimum) with the above version.

Survey results: Continue CSS Pixel definition draft review

<maryjom> Survey results: https://www.w3.org/2002/09/wbs/55145/WCAG2ICT-CSS-pixel-definition-round-2/results

maryjom: this was a second survey, just 6 responses this time.

maryjom: 5 of 6 had editorial suggestions

maryjom: Change "length" to "size" was one editorial.

maryjom: Loic had a more substative edit

loicmn: First, is it true that we can use normative language in notes?

loicmn: So I suggested a "should" as in "should align" rather than the imperative as written in note.

<maryjom> The chosen viewing distance is aligned with the use case and display type. For instance, in the case of a touchscreen, the viewing distance should be less than the length of an arm, typically around 28 inches (71 cm).

maryjom: I see should in another sentence

loicmn: My edit I think address the informative instruction

Mike_Pluke: Most standards bodies do not allow "should" in notes, so it would be nice to fix here.

<cwadams> +1 to fixing it here :-)

maryjo: So i agree we should fix it here

loicmn: What i have in survey is the full replacement.

maryjom: still leaves a should

<cwadams> bruce_bailey: I didn't put in survey, but I thought we had suggestion to explain where that number works out from, and I don't see it in draft, 2688. It also mentions a variable that is not anywhere else in text we have. Why would you assign a variable to viewing distance if you aren't going to show a formula?

bruce suggest showing the formula, where does the number come from, and why have variable (v) without a formula?

<loicmn> "Determine a viewing distance that matches the use case and display type. For instance, in the case of a touchscreen, the viewing distance is normally less than the length of an arm, typically around 28 inches (71 cm)"

maryjom: Yes, it's from arc length but not sure how to put into note in a way that is accessible and understandable

Mike_Pluke: I think "align" might be a term we would want to avoid as it may have more precise meaning than we mean.

loicmn: I did start to draft this in survey

maryjom: If we include formula, is note sufficient?

PhilDay: Can we make forumla accessible ?

mitch11: My recollection is that we were say less than was already in reference that we link to.

maryjom: I agree that reference has the formula

mitch11: Okay, so we are looking not for formula, but explaination.

maryjom: I guess we could just explain that it comes from arc lengh
… i wondering if we can just point else where.

Chuck: I do not know if we should use formula, but we have responsible to express in accessible format. How is another question.

<cwadams> bruce_bailey: I don't know that we need the formula. Maybe we should work it out in the wiki, but I think it can be paraphrased for our usage.

<cwadams> bruce_bailey: A tidy explanation.

maryjo asks for volunteers for forumla ?

mitch11: I can find it, but not this week or next

<cwadams> mitch you are a hero

maryjom: this does needs to be in 1st call public working draft

mitch11: Can we just say that it works out to divide by 2688 ?
… Could it be in WCAG Understanding?
… but we do not have understanding doc for wcag2ict

<Mike_Pluke> In EN 301 549 is relatively simple: Ψ = (180 x H) / (π x D)

Mike_Pluke: I am not sure about accessibity of formula math, but we have equation in EN301549

bruce: That line is accessible

Mike_Pluke: not sure if we need more than that

mitch11: I am not sure, I think if use radians, then left with height divided by distance, so that is the angle

mitch11: We have a prose formula. What else do we need?

mitch11: What are we missing?

[loice spells out where calc is coming from]

<loicmn> If we divide 28 inches (arms' lenght) by the derived reference pixel pixel size (1/96 inch) we get 2688

Mike_Pluke: people need to work elsewhere for their circumstances to scale up the distances

<cwadams> bruce_bailey: No, we need one more note saying 2688 comes from that formally typed in formula

maryjom: if we say that with note, are we oksy?

<loicmn> +1

<PhilDay> +1 to adding that

<Mike_Pluke> +1

<mitch11> +1 to the 28 inches and 1/96 inch explanation

PhilDay: I meant what loic typed

<loicmn> We could add: "(2688 is equals to 28 inches divided by 1/96 inch)"

<maryjom> Draft Resolution: Incorporate Note 2 with edits and the explanation of where 2688 came from

maryjom: anyone need that again?

<maryjom> "Determine a viewing distance that matches the use case and display type. For instance, in the case of a touchscreen, the viewing distance is normally less than the lenght of an arm, typically around 28 inches (71 cm)"

[phil notes typo on length]

<PhilDay> "Determine a viewing distance that matches the use case and display type. For instance, in the case of a touchscreen, the viewing distance is normally less than the length of an arm, typically around 28 inches (71 cm)"

<maryjom> The number 2688 is obtained by dividing 28 inches (arms' length) by the derived reference pixel pixel size (1/96 inch).

<PhilDay> +1

<maryjom> Calculate the length of the reference pixel: Divide the viewing distance (v) by 2688. The number 2688 is obtained by dividing 28 inches (arms' length) by the derived reference pixel size (1/96 inch).

<loicmn> +1

<maryjom> Calculate the length of the reference pixel: Divide the viewing distance by 2688. The number 2688 is obtained by dividing 28 inches (arms' length) by the derived reference pixel size (1/96 inch).

<mitch11> "length of the reference pixel" change to "size of the reference pixel"

bruce: why the (v) ?

<mitch11> Remove the (v)

<maryjom> Calculate the size of the reference pixel: Divide the viewing distance by 2688. The number 2688 is obtained by dividing 28 inches (arms' length) by the derived reference pixel size (1/96 inch).

<cwadams> bruce_bailey: You don't need the (v)

<maryjom> Draft Resolution: Incorporate Note 2 with edits and the explanation of where 2688 came from, as shown above.

<mitch11> +1

<ShawnT> +1

<PhilDay> +1

<ThorstenKatzmann> +1

<Mike_Pluke> +1

<Bryan_Trogdon> +1

<loicmn> +1

<maryjom> +1

RESOLUTION: Incorporate Note 2 with edits and the explanation of where 2688 came from, as shown above.

maryjom: Moving onto note 3.

loicmn: I suggested a rewrite in the survey.

<maryjom> However, only viewing distances that are plausible for the product can be considered an appropriate approximation for the reference pixel.

<maryjom> Original: However, for a density-independent pixel to be considered an approximation for the reference pixel, the viewing distance of the visual-angle pixel must be plausible.

maryjom: Good point that we need another pass to scrub out any "shoulds" from notes.

bruce: avoid must

<maryjom> Loic's edited version: However, for a density-independent pixel to be considered an approximation for the reference pixel, the viewing distance of the visual-angle pixel must be plausible.

PhilDay: The must was in previous version.

<loicmn> However, only viewing distances that are plausible for the product can be considered an appropriate approximation for the reference pixel.

<maryjom> Poll: Should we use Loic's version?

<mitch11> +1

<PhilDay> +1

maryjom: Please see loics version

<olivia> +1

<Mike_Pluke> +1

<ThorstenKatzmann> +1

<ChrisLoiselle> +1

<ShawnT> +1

RESOLUTION: Incorporate Note 3 with Loic's changes to remove normative language.

maryjom: Note 4 unanimous , so keep that as well.

<ChrisLoiselle> yes!

<cwadams> WOOOHOOOO

maryjom: given time, we wont start on reflow -- but next week !
… there are other surveys, and feedback is editorial so far

maryjom: if we get to reflow, that is all the open SC

<ChrisLoiselle> great job!

Summary of resolutions

  1. Replace existing non-web document note for 2.4.8 Target Size (Minimum) with the above version.
  2. Incorporate Note 2 with edits and the explanation of where 2688 came from, as shown above.
  3. Incorporate Note 3 with Loic's changes to remove normative language.
Minutes manually created (not a transcript), formatted by scribe.perl version 210 (Wed Jan 11 19:21:32 2023 UTC).

Diagnostics

Succeeded: s/lenght/length/

Succeeded: s/formulat/formula

Succeeded: s/was anonymous/unanimous

Maybe present: bruce, chuck, maryjo

All speakers: bruce, chuck, loicmn, maryjo, maryjom, Mike_Pluke, mitch11, PhilDay

Active on IRC: bruce_bailey, Bryan_Trogdon, ChrisLoiselle, cwadams, Devanshu, loicmn, maryjom, Mike_Pluke, mitch11, olivia, PhilDay, ShawnT, ThorstenKatzmann