flexdataset

The reference validator and CLI for the Flexible Dataset Definition (FDD) standard — a JSON format for describing datasets (tables) as files, validated structurally (JSON Schema) and semantically (cross-field and cross-file rules). See the project repository.

Install

npm install -g flexdataset

Or download a standalone binary (no Node required) from Releases.

Use

flexdataset validate <root>                      # structural + semantic checks
flexdataset validate <root> --format json        # machine-readable violations
flexdataset graph <root> --out dag.svg           # dependency DAG
flexdataset er <root> --out er.svg               # entity-relationship diagram
flexdataset er <root> --keys-only --out er.svg   # key columns only

validate exits non-zero when there are error-level violations. The graph and er commands render SVG via WASM Graphviz (no system Graphviz needed); they validate the root first and abort with a non-zero exit if it has error-level violations, so a diagram is only produced for a valid dataset.

License

Apache-2.0. See LICENSE.