spec 2 linked patterns checked
W3C ARIA23: Using role=log to identify sequential information updates
Documents role=log as a way to expose appended sequential updates such as chat conversation history to assistive technologies.
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What this source can teach
Use this source to check a technical or accessibility requirement against its exact wording and scope.
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- Trace the connection. Use the claim notes below to see how this site applies the source to specific patterns.
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Pattern Decisions This Source Supports
| Pattern | Supported decision | Required contract | Claim note |
|---|---|---|---|
| Agent progress trace | Choose agent progress trace when an agent or automation run has started and users need live status across multiple steps or tools. | The trace belongs to one run ID, reviewed plan version, objective, actor, start time, current state, and final state. | Supports exposing appended sequential updates to assistive technologies. |
| Chat interface | Choose chat interface when the user task depends on turn-taking, follow-up prompts, assistant responses, and conversation history rather than a single request field. | Every user-visible answer is tied to the exact user message and visible context that produced it. | Supports accessible announcement of appended sequential chat messages. |
Comparisons supported by this source
- Agent progress trace vs agent plan preview vs streaming response vs activity log vs progress bar vs human approval gate
Supports sequential appended updates for live trace milestones.
- Chat interface vs prompt box vs threaded discussion vs comments vs feed
Supports sequential chat transcript updates through an accessible log region.
Evidence Role
This source is treated as spec evidence. Its value comes from the specific claims and setting described above.
Publisher: W3C WAI. Last checked: .