SVG checklist
The compact rung tracker: the SVG surface by section, each item checked when a Chromium-gated rung lands it on the n0 path.
The compact tracker for the SVG engine of record (websem → rframe → n0).
One row per construct; ✅ means a Chromium-gated rung landed it, ⬜ is a
departure the compiler already names or surface not yet reached. To see
what is done, open
the visual corpus — the generated
status view renders every baked cell as a thumbnail gallery (each image is
the committed Chromium oracle, which byte-exactness makes the engine's own
render too) with the refusal register beneath it. This list tracks
position only: semantics live in
the statement of record, rung history in
the D-N register, and no score is computed from
it (FLIP is unratified). A rung's docs commit ticks its rows.
| Construct | Notes |
|---|
| ✅ | standalone SVG entry | strict XML, UTF-8, no DTD |
| ✅ | HTML entry | the document's first inline SVG |
| ✅ | root width/height/auto sizing | WxH as initial viewport |
| ✅ | viewBox | malformed refuses in both admissions |
| ✅ | preserveAspectRatio | full grammar; malformed refuses |
| ⬜ | percentage root sizing | |
| ⬜ | nested <svg> | |
| ⬜ | <symbol> | |
| ⬜ | <switch> | |
| ⬜ | <foreignObject> | |
| Construct | Notes |
|---|
| ✅ | <g> / <a> containers | |
| ✅ | <defs> | non-rendering, skipped by name |
| ✅ | <use> same-document | first-id-wins table, forward refs, xlink:href, x/y translate, cycle/unresolved → correct nothing |
| ⬜ | <use> under author CSS | shadow-scoped selector matching |
| ⬜ | <use> external references | |
| ⬜ | <use> of <symbol> / nested-<svg> targets | |
| Construct | Notes |
|---|
| ✅ | <rect> | |
| ⬜ | <rect> rx/ry | rounded corners |
| ✅ | <circle> / <ellipse> | auto and negative radii |
| ✅ | <line> / <polyline> / <polygon> | points grammar; declared prefix divergence |
| ✅ | <path>: M L H V C S Q T Z + fill-rule | |
| ⬜ | <path>: A elliptical arc | needs the rframe conic amendment |
| ⬜ | pathLength | |
| ⬜ | CSS geometry properties | x y cx cy r rx ry d — Gecko-only at the Stylo pin |
| Construct | Notes |
|---|
| ✅ | transform attribute | whole SVG grammar; malformed list drops whole |
| ✅ | CSS transform property + -webkit- alias | 2D affine set |
| ✅ | attribute↔CSS precedence | presentation-hint level |
| ⬜ | transform-origin / transform-box | |
| ⬜ | individual rotate / translate / scale properties | |
| ⬜ | beyond-2D function family | |
| ⬜ | root <svg> transform | |
| Construct | Notes |
|---|
| ✅ | fill | named/hex/rgb(a) sRGB, none, currentColor, inherit |
| ✅ | color | the currentColor basis |
| ✅ | fill-opacity / stroke-opacity / color alpha | float multiply, one quantize |
| ⬜ | beyond-sRGB color spaces | |
| ⬜ | paint-order | |
| ⬜ | context-fill / context-stroke | |
| Construct | Notes |
|---|
| ✅ | <linearGradient> | |
| ✅ | <radialGradient> | concentric; focal fx/fy/fr refuse by name |
| ✅ | <stop> | offset, stop-color, stop-opacity — attribute reads; author CSS on stops refuses |
| ✅ | gradientUnits / gradientTransform / spreadMethod | |
| ✅ | href inheritance between gradients | cycles → correct nothing |
| ✅ | fill/stroke url(#…) with fallback | |
| ⬜ | <pattern> | |
| Construct | Notes |
|---|
| ✅ | solid stroke paint | |
| ✅ | stroke-width | cascaded length; percentage against the viewport diagonal |
| ✅ | stroke-linecap / stroke-linejoin / stroke-miterlimit | |
| ⬜ | stroke-dasharray / stroke-dashoffset | |
| ⬜ | vector-effect | |
| Construct | Notes |
|---|
| ✅ | element opacity | the group-scope rung: fold or isolated layer by the measured rule; over a gradient/url() paint and on the root it refuses by name |
| ⬜ | clip-path | the scope's named next effect |
| ⬜ | mask | |
| ⬜ | <filter> / filter | |
| ⬜ | mix-blend-mode / isolation | |
| Construct | Notes |
|---|
| ✅ | display: none | attribute and CSS; root ignores it, as Chromium does |
| ✅ | visibility | descendant visible un-hides |
| ⬜ | display: contents | |
| Construct | Notes |
|---|
| ✅ | one Stylo cascade | <style> elements, style attributes, presentation hints (13 admitted) |
| ✅ | SVG-namespace stylesheet intake | |
| ⬜ | shadow-scoped matching | author CSS + <use> |
| ⬜ | longhands the pinned cascade cannot represent | stop-color, marker-*, paint-order, d, … |
| Construct | Notes |
|---|
| ✅ | the time axis | Base / exact signed-nanosecond Sample, no ambient clock |
| ✅ | SMIL animate on rect x | the proving slice |
| ⬜ | wider animated attributes | y width height cx cy r … |
| ⬜ | animateTransform | |
| ⬜ | CSS animations / transitions sampling | |
| ⬜ | beyond-slice SMIL | <set>, href retargets |
| Construct | Notes |
|---|
| ⬜ | marker-start / marker-mid / marker-end | |
| Construct | Notes |
|---|
| ⬜ | <text> | all of it |
| Construct | Notes |
|---|
| ⬜ | <image> | |
| ⬜ | external resources | self-contained input is the current contract |
| Construct | Notes |
|---|
| ⬜ | any HTML box layout | the surrounding page contributes nothing — pinned |