VoltGuard electrical symbol collection
=====================================

The SVG artwork in library.json and the embedded library in
Elektrik_Sembol_Kutuphanesi.html is derived from these sources:

1. upb-lea / Inkscape_electric_Symbols
   https://github.com/upb-lea/Inkscape_electric_Symbols
   Commit: 9be09cd0e8fcff72816517f240eeff76cef807e2
   Source: Inkscape_Symbols_All.svg
   License: CC0 1.0 Universal
   187 named symbol definitions are included.
   Credits: upb-lea and the upstream contributors. Complete original source
   artwork, including its metadata, is retained under sources/upb/.

2. basverdoes / ElectricalSymbolLibrary
   https://github.com/basverdoes/ElectricalSymbolLibrary
   Commit: ed1c2a3a910969b6de2483249515cce10cfd0a07
   Source scope: individual SVG files under src/symbols/ only.
   License of those individual symbols: CC0 1.0 Universal
   74 individual symbols are included.
   Credits: basverdoes and the original contributors identified in the SVG
   metadata, which is retained in the original files under sources/basverdoes/.

IMPORTANT SCOPE: basverdoes' combined library page, tutorial, README and other
repository files are CC BY-NC-SA 4.0. They are not copied or redistributed here.
The upstream README was read to verify its explicit individual-symbol CC0 scope:
https://github.com/basverdoes/ElectricalSymbolLibrary/blob/ed1c2a3a910969b6de2483249515cce10cfd0a07/README.md

Local modifications to the CC0 artwork:
- Extract individual renderable symbols from the UPB source sheet.
- Strip editor-only metadata from renderable derivatives (originals retained).
- Allowlist SVG drawing tags and attributes; remove external resources.
- Resolve local symbol/marker references and prefix identifiers per symbol.
- Resolve UPB bounding boxes with the browser SVG geometry API and add padding.
- Add Turkish names, search metadata and family labels in library.json.
- Prefix identifiers again for each canvas instance to prevent collisions.

The complete CC0 legal text is included in CC0-1.0.txt. Original source files
and a SHA-256 manifest are supplied in this directory. No upstream project's
endorsement or standard certification is claimed.

The VoltGuard search interface, JSON schema, drawing editor, validation,
orthogonal line routing, export functions and tests were authored for VoltGuard.
No application code or artwork was copied from ng-diagram-single-line-diagram,
fuse-box-labels, kicad-utils, OrCAD/Allegro parsers, ECAD View or step.parts.
Those projects were reviewed as integration candidates separately.

Reproducing the library:
1. python prepare-sources.py
2. node finalize-library.cjs
   Set VOLTGUARD_PLAYWRIGHT and VOLTGUARD_CHROME to local installed paths when
   the bundled development runtime is unavailable. No runtime dependency is
   required to use the tool: all 261 symbol geometries are embedded in HTML.

The compiled library is library.json. The tool embeds that same JSON as the
sg-library-data application/json script, with less-than signs encoded as
Unicode escapes. Future changes to the source library should regenerate it
and update the HTML data block before running tests/symbols.test.cjs.