reznakt/svg-basics

SVG Basics

Synthetic prompt and SVG pairs for fine-tuning a language model to write SVG. Each sample teaches one isolated concept, such as a blue rectangle, a circle with a stroke, a dashed line, a rotated square, or a radial gradient. Together they cover the basic SVG elements, their attributes, and common setups.

Every SVG is built and serialized with svglab, then checked before it is kept:

• it parses back into exactly the same text,
• it renders with resvg and is not blank on a white background,
• its geometry stays inside the viewBox.

Prompts and SVGs are deduplicated, and the split is stratified by category.

Columns

Column	Description
id	Stable identifier, <category>-<index>
prompt	The request, in prose or as an attribute list
svg	A complete SVG document
category	Curriculum category, such as circle or stroke
concept	Finer concept, such as stroke.dasharray
elements	Element names used, in document order
attributes	Attribute names used below the root <svg>

Conventions

• Every document has xmlns, width, height and viewBox, and attributes appear in a fixed, natural order: geometry first, then paint, then transform.
• When a prompt does not mention the canvas, it is 200 by 200.
• When a prompt does not mention a fill, the SVG omits it, so the shape is black by default.
• Prompts that use words instead of numbers follow fixed rules. The center is at 1/4, 1/2 or 3/4 of the canvas, as in "top-left" or "center". Size words map to 0.1 ("small"), 0.2 ("medium") or 0.35 ("large") of the shorter canvas side, used as the radius or half side.
• Path data uses explicit absolute commands, except in path.relative, which teaches lowercase relative commands.

Usage

from datasets import load_dataset

# a Hub repo id, or an absolute path to this folder ("." is not accepted)
ds = load_dataset("/absolute/path/to/svg-synth")
print(ds["train"][0]["prompt"])
print(ds["train"][0]["svg"])

Regenerating

nix develop          # or any shell with Python 3.12+ and uv
uv run python -m svg_synth.build --seed 0

Categories are generated in parallel, one worker process per CPU by default; set --workers N to change that. The output is deterministic for a given seed and does not depend on the number of workers. Files are written with zstd compression at level 19.

Contents

Category	Train	Test	Concepts
document	569	30	empty, background, background_shape, viewbox
rect	1900	100	basic, worded, square, rounded, default_fill, bar
circle	1424	75	basic, worded, centered, default_fill, dot
ellipse	1141	60	basic, worded, orientation, default_fill
line	1425	75	basic, axis, diagonal, linecap
polyline	951	50	zigzag, steps, open, filled
polygon	1426	75	triangle, isosceles, regular, star, diamond, quad, outline
path	2373	125	lines, hv, closed, cubic, smooth_cubic, quadratic, wave, arc, semicircle, pie, relative, heart, arrow
color	1419	75	named, hex_long, hex_short, rgb, hsl, none, fill_opacity
stroke	1900	100	color_width, only, dasharray, dashoffset, linejoin, opacity, widths
opacity	569	30	element, overlap, fill_stroke
transform	1426	75	translate, rotate_center, rotate_origin, scale, skew, matrix, combined
group	759	40	fill, stroke, transform, opacity
text	1141	60	basic, size, family, weight, italic, anchor, color, styled
gradient	761	40	horizontal, vertical, diagonal, radial, three_stops, fade
reuse	285	15	defs, visible
total	19469	1025

Samples per concept

Concept	Samples
document.empty	11
document.background	208
document.background_shape	190
document.viewbox	190
rect.basic	536
rect.worded	357
rect.square	357
rect.rounded	357
rect.default_fill	179
rect.bar	214
circle.basic	511
circle.worded	341
circle.centered	341
circle.default_fill	170
circle.dot	136
ellipse.basic	462
ellipse.worded	308
ellipse.orientation	308
ellipse.default_fill	123
line.basic	562
line.axis	375
line.diagonal	188
line.linecap	375
polyline.zigzag	303
polyline.steps	182
polyline.open	364
polyline.filled	152
polygon.triangle	238
polygon.isosceles	238
polygon.regular	286
polygon.star	238
polygon.diamond	167
polygon.quad	167
polygon.outline	167
path.lines	265
path.hv	221
path.closed	221
path.cubic	265
path.smooth_cubic	177
path.quadratic	265
path.wave	177
path.arc	265
path.semicircle	133
path.pie	133
path.relative	177
path.heart	88
path.arrow	111
color.named	221
color.hex_long	273
color.hex_short	182
color.rgb	227
color.hsl	227
color.none	182
color.fill_opacity	182
stroke.color_width	469
stroke.only	312
stroke.dasharray	375
stroke.dashoffset	188
stroke.linejoin	250
stroke.opacity	250
stroke.widths	156
opacity.element	214
opacity.overlap	214
opacity.fill_stroke	171
transform.translate	246
transform.rotate_center	320
transform.rotate_origin	123
transform.scale	246
transform.skew	197
transform.matrix	172
transform.combined	197
group.fill	216
group.stroke	216
group.transform	216
group.opacity	151
text.basic	133
text.size	167
text.family	167
text.weight	133
text.italic	100
text.anchor	167
text.color	167
text.styled	167
gradient.horizontal	148
gradient.vertical	148
gradient.diagonal	119
gradient.radial	178
gradient.three_stops	119
gradient.fade	89
reuse.defs	180
reuse.visible	120

Out of scope on purpose: filters, masks, clip paths, patterns, markers, animation and CSS <style> blocks.