Independent multi-vendor validation corpus

Evidence levels

Vendor support is reported at three distinct levels:

1. declared: an adapter and semantic mapping exist;
2. fixture-tested: synthetic or developer fixtures pass;
3. empirically-validated: independent real exports with version metadata, licensing review, validation artifacts, and successful audits pass.

The third level cannot be created by software alone.

Registering a case

corpus <- init_vendor_corpus("private/vendor-corpus")

register_validation_case(
  corpus_path = corpus,
  source_path = "private/exports/tobii-study-01",
  vendor = "Tobii",
  device_model = "Tobii Pro Spectrum",
  software_name = "Tobii Pro Lab",
  software_version = "1.x",
  export_profile = "gaze data + events",
  sampling_rate_hz = 300,
  coordinate_system = "display area normalized",
  timebase = "microseconds",
  event_semantics = "stimulus and trial markers",
  ocular_structure = "binocular",
  missingness_convention = "vendor validity codes",
  vendor_fixations = "exported fixation filter retained separately",
  package_transformations = "canonical renaming and unit normalization",
  unsupported_fields = "declared explicitly",
  independent_source = TRUE,
  licence_reviewed = TRUE,
  redistribution_allowed = FALSE,
  support_level = "empirically-validated",
  mode = "reference"
)

Fingerprinting, redaction, and semantics

fingerprint_validation_case("private/exports/tobii-study-01")
redact_validation_case(corpus, "tobii-study-01", remove_columns = c("participant_name"))

register_vendor_semantics(
  corpus,
  data.frame(
    vendor = "tobii",
    native_field = "Gaze point X",
    native_meaning = "horizontal display-area coordinate",
    canonical_table = "gaze_samples",
    canonical_field = "x",
    unit = "normalized",
    transformation = "identity",
    loss_risk = "none",
    evidence_case_id = "tobii-study-01"
  )
)

compare_vendor_semantics(corpus)

Compatibility evidence

build_compatibility_matrix(corpus, min_empirical_cases = 2L)
audit_vendor_field_coverage(corpus)
audit_roundtrip_loss(original, roundtrip)
write_vendor_case_report(corpus, "tobii-study-01")

A production claim should remain version-specific and should identify unsupported semantics rather than presenting a binary vendor badge.