Parse a 2019 schema with relative refs

[Kristallfee]

I am using Release 1.3.2. I try to parse a 2019-09 schema with internal references (all "$ref" start with "#/").
I created a minimal schema which does the trick:

{
    "$schema": "https://json-schema.org/draft/2019-09/schema",
    "type": "object",
    "properties": {
        "blubb": {
            "type": "object",
            "patternProperties": {
                "^([0-9a-fA-F]{8}-([0-9a-fA-F]{4}-){3}[0-9a-fA-F]{12})$": {
                    "$ref": "#/definitions/bla"
                }
            },
            "unevaluatedProperties": false
        }
    },
    "unevaluatedProperties": false,
    "definitions": {
        "bla": {
            "title": "BLA",
            "type": "object",
            "properties": {},
            "unevaluatedProperties": false
        }
    }
}

I checked it with node.js and ajv, there it can be parsed. My problem is, when I call jsonschema::make_json_schema( schema ), I get the exception "Don't know how to load JSON Schema 'https://jsoncons.com'". I learned, that if there is an $id or external references, then I need a reference resolver. But I am using just internal references and they do exist, so i expect not to need a resolver. Is there anything that I miss?

thank you

[danielaparker]

I think the issue is that you're using the keyword definitions rather than $defs with a 2019 JSON Schema. jsoncons can recognize definitions, but only if you specify "compatibility mode", i.e.,

try
{
    auto sch = jsoncons::json::parse(schema_str);

    auto options = jsoncons::jsonschema::evaluation_options{}
        .compatibility_mode(true);
    auto schema = jsoncons::jsonschema::make_json_schema(sch, options);
}
catch (const std::exception& e)
{
    std::cout << e.what() << "\n";
}

Admittedly the diagnostic message could be better.

[Kristallfee]

Thank you very much on that!
If someone is interested, here is it written in the release notes https://json-schema.org/draft/2019-09/release-notes#semi-incompatible-changes