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Welcome to the home page for the MessageFormat Working Group, a subgroup of the Unicode CLDR-TC.
The Message Format Working Group (MFWG) is tasked with developing an industry standard for the representation of localizable message strings to be a successor to ICU MessageFormat. MFWG will recommend how to remove redundancies, make the syntax more usable, and support more complex features, such as gender, inflections, and speech. MFWG will also consider the integration of the new standard with programming environments, including, but not limited to, ICU, DOM, and ECMAScript, and with localization platform interchange. The output of MFWG will be a specification for the new syntax, which is expected to be on track to become a Unicode Technical Standard.
We are looking for participation from software developers, localization engineers and others with experience in Internationalization (I18N) and Localization (L10N). If you wish to contribute to this work, please review the information about the Contributor License Agreement.
To follow this work:
- Apply to join our mailing list
- Watch this repository (use the "Watch" button in the upper right corner)
To contribute to this work, in addition to the above:
- Each individual MUST have a copy of the CLA on file.
- Individuals who are employees of Unicode Member organizations SHOULD contact their member representative. Individuals who are not employees of Unicode Member organizations MUST contact the chair to request Invited Expert status. Employees of Unicode Member organizations MAY also apply for Invited Expert status, subject to approval from their member representative.
This is the agenda document for upcoming calls of the MessageFormat subcommittee. We normally meet weekly
on Mondays at 9:30 Pacific (America/Los_Angeles). This is currently UTC+7.
See here for your local time.
Information on joining calls is found in the calendar invite.
This block reserved for scribe rotation.
Recent scribes:
- 2025-02-10 MED, MRR
- 2025-02-03 MIH
- 2025-01-28 MRR <- overachiever
- 2025-01-21 MRR
- 2025-01-13 ECH
- 2024-12-16 MIH
- 2024-12-09 RGN
- 2024-11-25 TIM
- 2024-11-18 ECH
- 2024-11-11 MIH
- 2024-11-03 ECH
- 2024-10-28 HGO
- 2024-10-21 APP
- 2024-10-14 MIH
- 2024-10-07 TIM
- 2024-09-30 EAO
- 2024-09-09 HGO
- 2024-09-02 (no quorum)
- 2024-08-26 ECH
- 2024-08-19 MIH, ECH
- 2024-08-12 RGN
- 2024-08-05 TIM
- 2024-07-29 ECH
- 2024-07-22 HGO
- 2024-07-15 LCA, USA
- 2024-07-08 MIH
- 2024-07-01 TIM
- 2024-06-24 STA
- 2024-06-17 ECH
- 2024-06-10 n/a
- 2024-06-03 MRR (removing pre-2024 history)
- 2025-02-17 Regular Teleconference https://docs.google.com/document/d/1kTHup5wooe5o3TH78Q-Drmfzr_QOfDA-9CKRTwXkzPo/edit
The next meeting will be 17 February 2025 and is a regular WG Teleconference call.
To request that the chair add an issue to the agenda, add the label Agenda+ To request that the chair add an agenda item, send email to the message-format-wg group email.
Timeboxed review of items ready for merge.
| PR | Description | Recommendation |
|---|---|---|
| #999 | Remove “coercion” from :string tests | Merge |
| #996 | Add missing “literal” specifier for key equality | Discuss |
| #990 | Allow name-char as first character of unquoted | Discuss |
| #989 | Simplify syntax character definitions | Discuss |
| #988 | Add :percent | Discuss |
| #983 | Drop reference to “registry” | Discuss, Merge |
| #923 | Test schema ‘src’ property | Discuss |
There is some pushback from the ICU-TC to making our spec final in v47. Reserving some time to discuss the status of this.
Shane has requested that we review how to include semantic date/time skeletons in 47
Mihai raised the issue that the fallback key is not distinct from its literal representation. Eemeli created a PR to address it. Conversation has ensued.
Topic: Unquoted Literal Syntax (#724)
https://github.com/unicode-org/message-format-wg/issues
Currently we have 38 open (was 36 last time).
- 21 are tagged for 47
- 3 are tagged “Seek-Feedback-in-Preview”
- 6 are tagged “Future”
- 14 are
Preview-Feedback - 1 is
resolve-candidateand proposed for close. - 4 are
Agenda+and proposed for discussion (see below) - 0 are ballots
| Issue | Description | Recommendation |
|---|---|---|
| 935 | Well-formed vs. valid (particularly https://github.com/unicode-org/message-format-wg/issues/935#issuecomment-2529306693) | Discuss |
| 724 | Message Format Unquoted Literals | Discuss |
| #865 | TC39-TG5 user study | Discuss |
| #866 | CLDR semantic datetime skeleton spec is nearly ready and MF2 should use it | Discuss |
What is the status of our various design docs?
| Doc | Description | Status |
|---|---|---|
| dataflow-composability | Data Flow for Composable Functions | Proposed (Obsolete?) |
| maintaining-registry | Maintaining the function registry | Proposed, Discuss |
| number-selection | Define how selection on numbers happens | Revision Proposed |
Accepted, Obsolete, and Rejected Designs
| Doc | Description | Status |
|---|---|---|
| function-composition-part-1 | Function Composition | Obsolete |
| beauty-contest | Choose between syntax options | Obsolete |
| selection-matching-options | Selection Matching Options (ballot) | Obsolete |
| syntax-exploration-2 | Balloting of the revised syntax used in the Tech Preview | Obsolete |
| variants | A collection of message examples which require a branching logic to handle grammatical variations | Obsolete |
| formatted-parts | Define how format-to-parts works | Rejected |
| quoted-literals | Document the rationale for including quoted literals in MF and for choosing the | as the quote symbol | Accepted |
| builtin-registry-capabilities | Tech Preview default registry definition | Accepted |
| code-mode-introducer | Choose the pattern for complex messages | Accepted |
| data-driven-tests | Capture the planned approach for the test suite | Accepted |
| default-registry-and-mf1-compatibility | Default Registry and MF1 Compatibility | Accepted |
| delimiting-variant-patterns | Delimiting of Patterns in Complex Messages (Ballot) | Accepted |
| error-handling | Decide whether and what implementations do after a runtime error | Accepted |
| exact-match-selector-options | Choose the name for the “exact match” selector function (this is :string) |
Accepted |
| expression-attributes | Define how attributes may be attached to expressions | Accepted |
| open-close-placeholders | Describe the use cases and requirements for placeholders that enclose parts of a pattern | Accepted |
| overriding-extending-namespacing | Defines how externally-authored functions can appear in a message; how externally authored options can appear; and effect of namespacing | Accepted |
| pattern-exterior-whitespace | Specify how whitespace inside of a pattern (at the start/end) works | Accepted |
| string-selection-formatting | Define how selection and formatting of string values takes place. | Accepted |
| variable-mutability | Describe how variables are named and how externally passed variables and internally defined variables interact | Accepted |
| bidi-usability | Manage bidi isolation | Accepted |
| selection-declaration | Effect of selectors on subsequent placeholders | Accepted |