Siegel-Spec v5

Status: Superseded by Siegel-Spec v7; v6 applied in the interim (v6, 2026-05-24). Frozen historical snapshot at 2026-05-21 — content and path references are no longer maintained. The geometry is unchanged, but the axes are now D/G/K (Diktion, Geist, Korrespondenz) and the binary K-axis uses belegt/ausstehend instead of verified/unverified. See the current canonical specification at /spec/siegel-v6/ and the project’s Foundation §7.

This page documents the v5 state for historical reference. New implementations should follow v6.

The semantic meaning of the axes is found in the Foundation §7.

Axes

The seal documents three axes of the genesis of a text:

• Top row — Form (F). Zero to five dots. Degree of substrate mediation of the linguistic surface.
• Middle row — Substance (S). Zero to five dots. Degree of substrate mediation of the content itself.
• Bottom row — Verification (V). Binary. No bar: bibliographically verified. Right-aligned half-stroke: verification pending.

Dots mean substrate mediation. Their absence means the author alone. The half-stroke is a marker for pending verification, not a judgment.

Parameters

Three inputs:

• form — integer from 0 to 5. F dots, top row.
• substance — integer from 0 to 5. S dots, middle row.
• verification — enum verified or unverified. V state, bottom row.

Optional:

• strokeWidth — number, default 1.8. For inline use in running text, 2.4 is recommended.

Geometry

Coordinate system: viewBox="0 0 130 100". All units refer to this system.

Brackets

Two square brackets with inward serifs. Serif depth: 8 units inward.

All bracket elements are rendered as <rect>, not as <path> or <line>. Stroke width matches strokeWidth. Corners exactly right-angled — no rounding.

Dots

Five fixed slot positions per row. Slot centers: 40, 52, 64, 76, 88. Distance between two adjacent slots: 12 units. Dot radius: 2.2.

A row with n dots fills the first n slots from the left. Position 1 is occupied when n ≥ 1; position 5 only when n = 5. No centered or distributed dots. Zero dots means: the row is empty, not invisible.

Y coordinates of the three rows:

• Form: y = 36
• Substance: y = 50
• Verification: y = 64

Verification half-stroke

With verification = 'verified': no rendering. The row stays empty.

With verification = 'unverified': a horizontal rectangle, right-aligned:

• From x = 70 to x = 92 (width 22 units)
• Centered on y = 64
• Height: 2.4

The stroke starts in the gap between slot 3 (x=64) and slot 4 (x=76), not under a dot. It ends 4 units past slot 5 (x=88) — symmetrical to the margin of the dots to the bracket.

The stroke weight is not thicker than the bracket, but equally weighted. So it does not dominate the notation.

Rendering rules

• fill="currentColor" for all elements. No fixed colors. The seal inherits its context’s text color.
• No stroke. All shapes are rendered as filled rectangles and circles.
• No gradients, shadows, filters, or effects.
• No frame around the seal, no background fill, no padding inside the viewBox.
• Scaling via CSS or the outer SVG attributes.
• No <title>, <desc>, no ARIA attributes in the SVG itself. Semantics are carried by the surrounding context.

Canonical states

A correctly generated seal must reproduce these outputs pixel-perfectly:

• The empty mark: buildSeal(0, 0, 'verified') — two brackets, nothing between them.
• A middle mark: buildSeal(2, 3, 'verified') — two dots top, three middle, no mark bottom.
• The full mark: buildSeal(5, 5, 'unverified') — both dot rows full, right-aligned half-stroke.

Reference implementation

A Python reference implementation that adheres to this spec exactly lives in the repo under scripts/siegel.py. A ported JavaScript implementation for client-side live preview lives under scripts/live-preview.js (or static/js/live-preview.js after deploy).

What not to do

• No round brackets, no curly brackets, no angle brackets.
• No numbers or digits next to or instead of the dots.
• No equals sign, no separator line between rows.
• No frame (rectangle, circle, oval) around the seal.
• No vertical bar graphic, no star rating, no percent display.
• No decorative serifs on the glyph itself, no typographic embellishment, no texture.
• No color distinction between rows. Everything in currentColor.
• The verification half-stroke must not be centered or left-aligned. Right-alignment is part of the spec.

Version history

• v5 (2026-05-21): Verification marker changed from centered full-stroke (x=36..92, height 3.4) to right-aligned half-stroke (x=70..92, height 2.4). Axis vocabulary harmonized to F/S/V.
• v4: First version with full axis geometry. Verification marker as centered full-stroke. Axis vocabulary K/T/R — superseded by Foundation §7.
• v1–v3: Predecessors, discarded by v4.