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schema-calc v0.1.1

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@fMindstormer fMindstormer released this 31 Oct 01:01
· 26 commits to main since this release
v0.1.1
3305ae7

A compatibility release. The compiled schemas now load with default options in ten of the twelve Draft 2020-12 validators tested in five languages, up from six. The input language is unchanged, and no validator gave a wrong answer on any record. The invoice schema grows by 132 bytes. Try it in any browser; nothing is sent to a server.

Validator compatibility

The flat corpus (31 schemas, 24,472 records) and the shipped examples were run through every validator with its default options (full table):

Validator v0.1.0 schemas v0.1.1 schemas
santhosh-tekuri/jsonschema, kaptinlin/jsonschema (Go) refuses all 31 loads all, all records agree
JsonSchema.Net (C#) refuses 3 loads all, all records agree
networknt json-schema-validator (Java) times out on the invoice loads all, all records agree
@cfworker/json-schema (JS) refuses 23 refuses 23; loads all with --defs
jsonschema-rs (Python) exceeds 2 GB on 11 exceeds 2 GB on 10 (8 with --defs)
Ajv, hyperjump, schemasafe, Python jsonschema, harrel, json-sKema loads all loads all, all records agree

What changed

  • No lookahead. Each field's format ends with $ plus not: {pattern: "[^.0-9]"} instead of (?![\s\S]), which Go's RE2 does not support. The second pattern is needed because $ in Python, Java and .NET also matches before a final line terminator; tests now cover \n, \r, \u0085 and 
.
  • At most 32 nesting levels. Subschemas that would nest deeper move into a root $defs. JsonSchema.Net's JSON parser stops at 64 levels, and networknt's load time grows steeply with depth. compile(spec, { maxDepth }) sets the limit.
  • Optional $defs layout. --defs or compile(spec, { layout: 'defs' }) declares every shared resource in root $defs, so none sits inside another, which @cfworker/json-schema requires. It costs 17–20% more bytes.
  • Browser preparation now orders resources by dependency.

Check it without Schema Calc

Python 3 and jsonschema only, in an empty directory:

python3 -m pip install jsonschema==4.25.1
base=https://github.com/fMindstormer/schema-calc/releases/download/v0.1.1
for f in validate.py invoice.schema.json invoice.valid.json invoice.invalid.json; do curl -fLO "$base/$f"; done
python3 validate.py invoice.schema.json invoice.valid.json invoice.invalid.json
ACCEPT  invoice.valid.json
REJECT  invoice.invalid.json

Sizes

Example v0.1.0 v0.1.1
invoice 41,232 B 41,364 B
allocation 16,315 B 16,447 B
carry chain 20,510 B 20,605 B

Files

invoice.schema.json is the compiled invoice contract; invoice.valid.json and invoice.invalid.json are the correct record and the one a cent off, unchanged from 0.1.0. validate.py is the standalone validator: it needs only jsonschema and never imports the compiler. schema-calc-0.1.1.zip is the source, with a MANIFEST.sha256 inside; schema-calc-0.1.1.zip.sha256 is its checksum and SHA256SUMS covers every file.

Scope

Unchanged: sums and differences of nonnegative decimal strings, up to 8 fields, 8 equations and 12 digits. A research prototype; it is not published to npm. Benchmark timings in the repository were measured on the 0.1.0 schemas.

Assets 9
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