Handing Over the Keys

Enabling User-Controlled MetadataDoug Schepers, W3C

Metadata is Locked Away

•media files are born with metadata

•media files accumulate metadata

•access to metadata is context-limited

Flavors of the Data•intrinsic

•width, height, duration

•extrinsic

•title, author, tags, timestamps, geodata

•automatic vs. manual

•authoritative vs. user-generated

Default Metadata Display

play status control

timeline

playback

progress

download progress

position markercontrol total

length

taghotspot

rich commenthotspot

lots of other stuff

elapsed time

total time

Temporal Datatags

rich comments

Locative Data

Meta-Authoring

Access and Accessibility

•authors are often lazy or busy

•many eyes, many ears, many hands

•challenge in too much data

•metametadata

Social Networks Horde Metadata

•social networks accumulate information from “meta-authors”

•comments and tags

•timestamped information

•everything is lost when it is saved

Dynamic Content is Crippled

•information about details is important for presentation

•authors only have access in design tools

•data is only available at design time

3 Keys

•provide universal access to metadata

•deploy uniform metadata format

•encourage sites to free up data

MAXIM

•Metadata Access and eXtensible Information for Media specification

•read, write, and save

•client-side and server-side

Too Much Confusion Here

•profusion of formats

•packaging, embedded, external

•binary, text, XML

•each has special niches

•should be uniform, if not universal

•RDF (XMP?)

Uniformat•need standard on what formats

should do

•should address spectrum of use cases

•benefit across entire toolchain

•from videocamera to editing suite to authoring tool to dynamic site to tagger to end-user, and back

Rich Linking

•browser can link to specific contexts

•times and ranges

•named timestamps

•keyword cueing

•search engines

•tags, keywords, authors

Encourage Openness

•emphasize application, not content control

•site as typewriter, not as library

•pickpocket data for justice

•browsers can give advanced “Save As”

•end-users can pick and choose

W3C Video on the Web Workshop

•12-13 December 2007, San Jose, California and Brussels, Belgium

•Doug Schepers

•W3C Team Contact, SVG, CDF, and WebAPI Working Groups

•schepers@w3.org