Module export 

Export writer for mushroomdb export.

Supports three formats:

• jsonl: nodes.jsonl, edges.jsonl, rules.jsonl (always deterministic)
• parquet: nodes.parquet, edges.parquet, rules.parquet (byte-identical output is NOT guaranteed across parquet-rs versions; use JSONL when byte-stable reproducibility is required)
• graphml: a single .graphml file (nodes + edges only; rules have no GraphML analogue) for import into generic graph viewers and analysis tools

Two runs on the same store state produce byte-identical JSONL and GraphML output (sorted by key / (edge_type, src, dst) / name — callers must pre-sort the slices).

Float precision loss

Value::Float values that are NaN or ±Inf are not representable in JSON or in GraphML’s numeric attribute types. They are serialised as JSON null (JSONL) or an empty <data> element (GraphML) rather than causing the export to fail. This is a lossy mapping; the original value is irrecoverable from the export. Stores that need exact float fidelity should use the binary backup command instead of export.

Enums

ExportFormat

Accepted export formats.

Functions

write_graphml

Write a single GraphML file describing nodes and edges.

write_jsonl

Write JSONL files to dest: nodes.jsonl, edges.jsonl, rules.jsonl.

write_parquet

Write parquet files to dest: nodes.parquet, edges.parquet, rules.parquet.