如何获取可能的 JSON Schema 格式值列表以在 REACT 应用程序中使用？

Question

We are developing a REACT application that needs to get a list of the JSON schema standard built-in formats. According to json-schema.org reference page the built-in formats are as follows:

• Dates and times
• Email addresses
• Hostnames
• IP Addresses
• etc.

I'd rather if I didn't have to hardcode those values in our application, so how can we retrieve a list of those possible values programmatically?

[EDIT]

A clarification, we are developing a JSON schema that sets "$schema": "http://json-schema.org/schema" . This is how the app would be able to identify that we are using the current JSON Schema specification. From there we are looking for a way to load possible values for "format" so we can present it in the UI.

Answer 1

$schema indicates the version of the specification that the schema that declares it is using.

Each version of the specification declares a (small) static set of available formats.

It's not unreasonable to hardcode these sets into a lookup by $schema value. There are only 4 or 5 (if you include draft 4) values for this keyword, unless you're writing your own meta-schemas.

I've hardcoded them into my JSON Schema library, JsonSchema.Net .

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If you're looking for an automated way to find these values, you're going to have to scan the specification documents themselves. They're not listed in the meta-schemas, which is what you get when you navigate to the URI (not a URL) find in $schema . The meta-schema just requires that format 's value is a string.

The specification intentionally leaves this open-ended so that people can create their own custom formats.