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PureXML/docs/roadmap.md
Mihaela Mihaljevic be8a39394d fix(schema): advance XSTS valid-instances-rejected to 4 (#146) 
Consolidates the in-progress #146 work; valid-instances-rejected reaches 4
on the 2006-11-06 XSTS archive (buckets now 1/262/4/147).

Regex: match Unicode scalars rather than grapheme clusters; the empty
pattern matches only the empty string; pin the category repertoire to
Unicode 3.2, the version the corpus is consistent at, so code points added
in 3.2 (Tagalog, Cyrillic Komi) are word characters while later additions
(the Tamil digit zero) stay unassigned and match \D. New XSDCategory and a
3.2 assignment table derived from DerivedAge, replacing the old Unicode31
files.

Content model: assess each child against the particle the content automaton
matched, not a by-name lookup (#180). Two same-named particles keep their
own fixed values, and an element matching a skip wildcard is no longer
validated against its global declaration. Selection is made reproducible
when an ambiguous schema slips past the UPA check.

XSTS runner: compile and merge every schemaDocument in a schemaTest, not
just the first; this also surfaced one previously-masked invalid-instance
acceptance (recorded in the baselines).

Also folds in attribute-group anyAttribute inheritance, extension wildcard
union, namespace-qualified type tables for multi-document
xsi:schemaLocation, per-container elementFormDefault, strict and lax
attribute wildcard validation, built-in type resolution, and xs:redefine
simpleType overrides.
2026-06-16 22:22:05 +02:00

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Roadmap

Living index of open work. Pin #167 on GitHub for the checklist view. Released v0.2.0 (2026-06-16); pre-1.0 until the production-readiness gates in docs/production-readiness.md are earned.

Current focus (priority order)

  1. #161: cross-document schema composition (include/import/redefine): chameleon include + cross-container reference checks landed; attg/schZ XSTS burn-down still open.
  2. #158 / #159: Particle Valid Restriction/Extension completion.
  3. #169: located schema diagnostics (line/column).
  4. #172–#174: instance-validation cluster tasks.

Parallel: #130 (XSLT suite), #139 (performance epic; tasks #175–#178).

M1 done: #171 schema differential harness (closed; opt-in; 231 XSTS oracle disagreements pinned) + generative fuzz + validation framework (#92).

XSTS gates (v0.2.0 baselines)

Gate Now Issue
Valid schemas rejected 1 #148
Invalid schemas accepted 261 #145
Valid instances rejected 99 #146
Invalid instances accepted 147 #147

Gates are metric trackers, not implementation tasks. Pick up task issues; ratchet baselines in Tests/XSTSSuiteTests.swift when counts fall.

Milestones

Milestone Exit criteria Key issues
M1: Trust the oracle Reference differential + fuzz #171 (closed), fuzz
M2: Schema compiles correctly #145 to 0 #161, #158, #159
M3: Instances validate correctly #146, #147 to 0 #172, #173, #174
M4: IDE-ready diagnostics Located errors, proven bounds #169
M5: 1.0 All gates at 0 #148 (closed at floor), #130, #139

Labels

Label Meaning
epic Grouping issue
gate XSTS outcome metric
task Implementation work
area-schema / area-instance / area-infra / area-xslt / area-perf Subsystem
priority-P0 / P1 / P2 Critical path vs parallel

Related docs

  • docs/production-readiness.md: the bar for IDE authority
  • docs/schema-validity-burndown.md: schema-side burn-down protocol
  • docs/xsts-deviations.md: deviation taxonomy and documented floors