Hacktoberfest 2026：维护者为十月标记出来的 issue，仍然开放、适合新手。 浏览 Hacktoberfest issue

Underdefined phonology: provisional definitions, and analysis-side membership of featureless segments

未关闭
  • 哪里不对？
#537 0 条评论 0 个 reaction 已指派 0 人 在 GitHub 查看

维护者通常 1 天内回复

还没有人认领这个 Issue。

评估

难度
5/5
预计耗时
一周以上
新手友好度
25/100
Issue 类型
缺陷
描述清晰度
需要澄清
活跃度
活跃
技术栈
csharp
领域
backend

调研方向

This issue is a discussion about analysis-side unification for featureless segments and where provisional definitions should live; it does not identify files or tests. Start by locating HermitCrab's analysis rule-unapplication and the environment/class matching paths, then compare their behavior with synthesis. Done means establishing whether the extra mupa analysis is intended and giving a reasoned recommendation on the policy's proper home.

由索引模型根据 Issue 内容生成。

描述

Hermit Crab

HermitCrab needs a fully defined phonology. When a FieldWorks project leaves a letter or a natural class undefined, FieldWorks' HCLoader drops the affected allomorphs and environments (with diagnostics), so a project that parses under XAMPLE loses words, or gains wrong parses, when it switches to HermitCrab. AcceptUnspecifiedGraphemes recovers many of these forms, but not all.

PanGloss (a Rust port of HermitCrab) has decided to run such "underdefined" projects anyway, by supplying a provisional definition for each undefined thing and reporting each one to the author as an informational finding. A fully defined project still parses exactly as HermitCrab does. We'd like to know whether this belongs in HermitCrab itself, in HCLoader, or nowhere upstream, and to raise one likely HermitCrab inconsistency we found along the way.

What we measured

12 synthetic project families, run through native XAMPLE 3.12.23.21, FieldWorks HCLoader 9.3.10.1452 (LCModel 11.0.0.55173) and Machine HermitCrab 3.8.2.0:

  • Undefined letters in roots and affixes. XAMPLE keeps the words. HermitCrab with AcceptUnspecifiedGraphemes off drops them; with it on, the tested forms come back.
  • A multigraph exemplar ({ch} in the LDML) that is not a phoneme. XAMPLE returns both root chuma and prefix c- + root huma. HermitCrab with AcceptUnspecifiedGraphemes on segments ch as one unit and loses the second analysis.
  • An environment naming a class that does not exist (/ [V] _, no V). FieldWorks omits the restriction before XAMPLE sees it, and HermitCrab discards it too; both accept the affix unrestricted.
  • A featureless phoneme and a feature-defined class. In environments and forward rules, HermitCrab does not treat a featureless x as a member of V = [voc +] (subsumption). When unapplying a phonological rule during analysis, it does (unification), and that yields an extra root analysis that synthesis would never produce (mupa gets a second root). This looks like an inconsistency in HermitCrab itself.

What PanGloss does

  • An undefined letter becomes a provisional segment, one visible character at a time. It belongs to no class that names letters or requires a feature value; a class with no conditions still matches it.
  • A phoneme with no features belongs to no class that requires a feature value, in every path, including analysis. That removes the extra analysis above, which is the one place PanGloss now differs from HermitCrab for these segments.
  • Phonological rules the author wrote still apply, even though XAMPLE ignored them.

Questions

  1. Is the analysis-side unification behaviour for featureless segments intended? If not, should analysis use subsumption, matching environments and synthesis?
  2. Would a provisional-definition policy be welcome in HermitCrab or HCLoader, or should it stay in PanGloss?

The raw outputs, full analysis identities, controls and errors for every case are available. This is a discussion, not a bug-fix claim.

主要语言
C#
星标
29
派生
16
平均合并
6 天 6 小时
30 天内合并 PR
10

环境准备

  • 没有 Dockerfile 或 Docker Compose 文件
  • 有 Pull Request 模板
  • 没有贡献指南

从这里开始

  1. 先读完整个 Issue，再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库，在一个分支上完成修改。
  4. 提交 Pull Request，并在描述里引用这个 Issue 编号。

sillsdev/machine 的其他 Issue

查看 sillsdev/machine 的全部 Issue

相似的 Issue

更多 C# Issue

把新 issue 发到你的邮箱

精选适合新手参与的 GitHub issue 摘要。