Example data for learning the formats and for testing implementations. All text here is synthetic, written for these files and dedicated CC0; license fields inside the fixtures describe fictional works.

Packages

Package	What it shows
`packages/hale2026harmonic/`	The main example, followed step by step in the walkthrough: a chemistry paper read once with mistakes and fixed by twelve corrections. It has a table with two levels of column headers and grouped rows, an equation inside a sentence, a footnote, a figure with text inside its panels and a real image, references, legacy aliases, boxes on fingerprinted pages, receipts in every state (counting, partly invalidated, spot-checked, revoked and suspended), the roster that signed them, a dataset taken from the table, and derived MathML.
`packages/hale2026harmonic.checks-only/`	The same document prepared for another of the team's machines: text withheld, every hash an HMAC under the team key in `keys/`.
`packages/okafor2025open/`	An open-access paper established from a JATS file and a PDF that agree, so every sentence is corroborated.
`packages/smithlab2027charges/`	A short draft written in Typst, whose sentences cite sentences of the main example by address.
`packages/tiny2026example/`	A small document, the starting point of the correction vectors and the broken packages.

Records

records/ holds a valid example of every other format: anchors (a span, a leaf, a cell, a paragraph, and one keyed for a public layer), rights records, a team policy, backend declarations, team profiles, a layer with its annotations and the receipt that confirms them, submissions and grades, a project, a digitization with its confirmation and the dataset it yields, a view, a QA report, a draft snapshot and a draft's sentence IDs.

Broken packages

Each folder in invalid/ holds a package that breaks exactly one rule, and expect.json names it. A conforming implementation refuses every one of them and should report that rule.

Case	What is wrong	Rule
`alias-dangling/`	An alias whose node does not exist.	`doc.id.successor`
`bad-id/`	IDs use Crockford base32, which has no i, l, o or u.	`package.schema`
`checks-only-plain/`	A checks-only package that still carries text and plain hashes.	`doc.policy.withheld`
`cite-not-reference/`	A cite run names a node that is not a reference.	`doc.run.cite`
`empty-optional-file/`	An optional JSONL file with no records.	`package.file.empty`
`hash-mismatch/`	A node_hash that does not recompute.	`doc.hash.node-hash`
`heading-not-first/`	A heading must be a section's first child.	`doc.tree.child`
`location-unknown-page/`	A location on a page no witness has.	`doc.location.page`
`manifest-hash/`	A file changed after the manifest was written.	`package.manifest.hash`
`not-canonical/`	A line that is valid JSON but not canonical JSON.	`package.file.canonical`
`receipt-root/`	A receipt whose Merkle root does not recompute.	`doc.receipt.root`
`receipt-signature/`	A receipt changed after it was signed.	`doc.receipt.signature`
`root-mismatch/`	document.json's root is not the root node's node_hash.	`doc.hash.root`
`style-sup-sub/`	A run cannot be both a subscript and a superscript.	`doc.run.style`
`text-edited/`	Text changed without its hashes.	`doc.hash.text-hash`
`unknown-kind/`	Kinds outside the list are refused.	`package.schema`
`unlisted-file/`	A file the manifest does not list.	`package.manifest.unlisted`

Keys

keys/ holds the Ed25519 secret keys that signed the fixtures' receipts, and the team secret of the checks-only package. They are published so that anyone can reproduce the signatures; never use them for anything else.

Sources

src/ holds the hand-written descriptions of the three main documents, as first read; see src/README.md. Everything else here is generated by python3 tools/build.py, so change the sources or the builder, never the generated files.