Metadata Round-Trip

Gauss preserves editor-only metadata through save and open cycles:

• Shape identity: each shape is assigned a stable gauss:id that survives round-tripping. This ensures that external tools referencing shapes by ID continue to work after editing in Gauss.
• Shape names: user-assigned names (gauss:name) are preserved.
• Locked and hidden states: gauss:locked and gauss:hidden flags are persisted on the SVG element and restored on open.
• Forward compatibility: unknown gauss:* attributes written by future versions of Gauss are preserved by the current version during round-trip.
• <metadata> block preservation: any content inside the SVG <metadata> element (including third-party metadata such as Dublin Core or RDF) is preserved verbatim through save/open cycles.

This metadata does not affect how the SVG renders in other viewers — it is stored in XML-namespaced attributes that conforming SVG renderers ignore.