EPUB 3 Working Group Virtual Locators Task Force Telco — Minutes

Date: 2021-06-16

See also the Agenda and the IRC Log


Present: Wendy Reid, Toshiaki Koike, Pilar Wyman, Ben Schroeter, Shinya Takami (高見真也), Dan Lazin



Chair: Wendy Reid

Scribe(s): Pilar Wyman, Wendy Reid


1. Japanese reading system’s behaviour

Wendy Reid: summarizing last meeting and noting we are unclear on Japanese reading systems and how they are handling page lists and lack thereof in ebooks. Do they want page #s?

Toshiaki Koike: VOYAGER’S Reading System converts from EPUB to internal format, and to identify the location, use both the number of characters from the beginning and text strings around the location, then if the contents modify a little, Reading System can trace the original location.
… And about page number, our RS renders all pages when opening the book, resizing window, and resizing font size, then has the index of pages.

Wendy Reid: do pages get rendered again when font changes?

Pilar Wyman: I was asking about the use of the term index, how do you handle ebooks that have an index with listing of page numbers or locations

Toshiaki Koike: sharing screenshot from reading system, position in text (from beginning) is used for indicating location.

Wendy Reid: is this unique? or is it common to other reading systems?

Shinya Takami (高見真也): Voyager is doing its own thing, and other vendors in Japan seem to have each their own system.

Wendy Reid: bookmarking systems all rely on span tags

2. Locator Note

Wendy Reid: See current draft of the note

Wendy Reid: See reference to the github source

Dan Lazin: we can start drafting a note, which will help us focus and move forward. the actual algorithm itself is essentially an appendix.
… sample note we can follow?

Wendy Reid: similar style to specs, with supportive text, more than usual
… will be good to say why current options don’t work
… review will not happen, rigor will apply should it be deemed acceptable to go ahead.

Pilar Wyman: My question was about the abstract, it doesn’t seem clear

Wendy Reid: common writing program such as Google Docs might be appropriate

Dan Lazin: we will ask page lists be included. algorithm for figuring alternative locators is secondary.

Wendy Reid: google and Adobe have similar approaches for designating where text is in an epub. readium does similar, compressed though.
… “adobe page numbers”
… internationalization group should be first reviewers of whatever we draft.
… fixed-layout has page numbers, page list, but we should consider it as well

Dan Lazin: let’s put in outline

Wendy Reid: https://docs.google.com/document/d/11GypOjE9xOTaINATl5bxVIA3Mc9jzNBGCr6GT_KNaQ4/edit?usp=sharing

Ben Schroeter: MobileRead wiki discussed all this, but it way out of date

Pilar Wyman: 2 things, being a large number can interfere with index entries
… readers could get frustrated
… if the page they’re looking for is many “screens”
… phrasing of “absolute page numbers”
… we’re talking about a page number that doesn’t change that’s available to readers

Ben Schroeter: structured texts are cool

Wendy Reid: homework is to contribute to the draft note