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TPAC2016 took place M-F in Lisbon, Portugal.

On Wednesday, 21 September, we held a "Plenary Day." As we did for TPAC2015, we organized most of the day as "camp-style" breakout sessions. We invited you to add to or comment on Breakout session ideas. The people at the meeting that day built the Session Grid, drawing from ideas socialized in advance and new ideas proposed the day of the meeting.

  • Questions? See the FAQ.
  • See Also past TPAC meetings.

Wednesday 21 September Plenary Day Schedule

  • Plenary sessions take place at Centro de congressos de lisboa. See schedule.
  • Breakout sessions take place in nearby rooms.
  • The lunch space accommodates slightly fewer people than registered; therefore breakout sessions overlap lunch time on each end.


  • 08:00-08:30: Registration
  • 08:30-08:35: Welcome - Jeff Jaffe
  • 08:35-09:05: Redecentralization of the Web - Tim Berners-Lee
  • 09:05-09:15: Data Breach, Reaction and Response(*) - Ted Guild
  • 09:15-10:00: Breakout preparation + last additions to Breakout session ideas (Coralie Mercier)
  • 09:15-10:00: Coffee break (**) - Hall 4, First Floor
  • 10:00-11:00: Breakouts (see grid below)
  • 11:00-12:00: Breakouts (see grid below)
  • 11:30-14:00: Lunch - Restaurant, First Floor
  • 13:00-14:00: Breakouts (see grid below)
  • 14:00-15:00: Breakouts (see grid below)
  • 15:00-15:30: Coffee break - Hall 4, First Floor
  • 15:30-16:30: Breakouts (see grid below)
  • 16:30-18:00: Breakout reports
  • 18:30-21:30: Reception - Foyer E
    • 20:45-21:20: - Auditorium VI and VII (Private showing of a 35-minute documentary film about Sir Tim Berners-Lee, by Academy Award winning director Jessica Yu, which gives a history of the Web as well as a call to protect its future and features Tim, his family and colleagues including W3C CEO, Jeff Jaffe.)

(*) Introduction to subsequent Breakout session; if you're a security expert, please consider signing up.
(**) Breakout preparation and morning break overlap.

Read the minutes of the day:

Breakout Schedule (session grid)

[35 sessions]

Room (capacity)/Slots 10:00-11:00 11:00-12:00 13:00-14:00 14:00-15:00 15:30-16:30
Auditorium VI & VII, Ground Floor (48) Positive Work environment + Global Participation Enhancement (minutes) reserved for DNT


5A, Hall 5, First Floor (48) Web VR (minutes) Redecentralize and Social Web (#social, IRC Log / minutes, and breakout session photos!) WICG(minutes) Publications, Manifests, etc. (apps or docs) Apache Annotator (W3C + ASF)
5B, Hall 5, First Floor (48) Thumbnails in video (minutes)
5C, Hall 5, First Floor (48) HTTPS migration in local network
Block chain (intro, use cases & reqs) WebIDL Future Work (Etherpad)
Auditorium III, First Floor (30) Verifiable Claims WG (summary), (proposal), (slides), (minutes) reserved for WoT PlugFest Demo Pitch reserved for WoT PlugFest Demo
Auditorium IV, First Floor (30) Responsive Images: Declarative aspect ratios minutes Micro-payments (w/browser plugin demo) Notes and Minutes Paid Content
1.07, Hall 4, First Floor (30) Fusing language and sensor data (summary) What's new in pubrules and automated publishing
[REQUEST] (needs phone; scheduled at 11:00)
Education & Outreach WG (EOWG) What is it & how can it support your work? (Eric Eggert) Future of Communications on the Web (minutes)
1.08, Hall 4, First Floor (30) New Accessibility Guidelines & Mobile Accessibility Accessibility Object Model (AOM) Subtitles & Text Track & Text TrackCue minutes AWPAT CG, HTML5 Testing Project (Chaals, Max) Horizontal Review (Janina Sajka)
1.05, Hall 4, First Floor (28) Async Web (Nolan Lawson) CSS Step String for block height (Koji) Virtual Assistants
(summary, minutes)
1.06, Hall 4, First Floor (26) Protect against Data Breach, Web Authn 2FA (Ted G) minutes Security JAM (news from W3C & new topics on security) minutes Origin Isolation/Browsing Context Isolation (AnneVK, Mkwst) minutes WAI standards harmonization roadmap (Rich S) Vocabulary Development, Namespaces Management Minutes
1.15, First Floor (26) Storage
1.03, First Floor (22) HDR and Web [minutes] Make W3C great again (how to make W3C a better platform for collaboration) Mobile Accessibility - Kepeng Li (irc: #matf) minutes
1.04, First Floor (22) Music Notation Community Group (Update)

Aggregated Summaries

@@work in progress.

High Dynamic Range (HDR) on the Web

What is HDR

High-dynamic-range (HDR) is a technique used in video, imaging and photography to reproduce a greater dynamic range of luminosity than is possible with standard (SDR) video, digital imaging or photographic techniques.

What has changed since last year

  • CSS4 color with

* ICC support * CIE Lab * Working colorspace * Bit-depth neutral numbers

  • Convergence of Movie/TV, Digital Imaging, Web
  • ICC moving beyond print focus and D50 colorimetry

* ICCMax * spectral imaging * measurement conditions * viewing conditions * beyond paper white * compositing

  • Hardware support at volume

What do we need

  • HDR video on the web

* BT.2100 * PQ and log-gamma transfer function

  • HDR images (stills, photography)
  • CSS matching colors in the above
  • Compositing in linear-light colorspace
  • Compositing SDR with HDR
  • Fallback for SDR display

* Responsive images * Media Queries

  • HDR support in opensource codebases

* porting to TV does not add new major features

  • Developer awareness and guidance

* access to deep color, high bitdepth displays

  • Image format support for HDR

* freely implementable * HDR support (10bit PQ) * good compression * animation a plus

Next steps (two CGs)

  • Background explainer

* for the lightly yinterested developer * pointers to more information

  • Image format requirements

Next steps (liaisons)

  • W3C and ICC on Web profile of ICCMax
  • Continued review of CSS4 Color and CSS5 Color

Participants: Leonard Rosenthal (Adobe); Chris Needham (BBC); Mark Vickers (Comcast); Mike Assenti (Dolby); Stefan Håkansson (Ericsson); Lea Verou (Invited Expert, CSS); Frank Olivier (Microsoft); Mark Watson (Netflix); Chris Lilley (W3C); Liam Quin (W3C); Bert Bos (W3C); Florian Rivoal (Vivliostyle).

Breakout title

Create breakout summary, e.g.
Transclude here using syntax: {{:TPAC2016/session-foo-summary}}

See Also