Installation

npm i @govtechsg/oa-schemata

Types are automatically generated when publishing the package. You can directly access to the exported types:

import {healthcert} from "@govtechsg/oa-schemata"

Adding a new schema

1. Create a file named schema.json: the file must contain the newly added JSON schema and must be placed under a reversed domain name structure. For instance if your schema is related to tech.gov.sg, then place the file in src/sg/gov/tech/<name>/<version>/schema.json. In that example <name> and <version> must be replaced by real values.

   • The schema file name must strictly be schema.json. It will be automatically published.

   All json files in the src folder will be published.

   • The schema will be published at the URL following the structure of the src folder. For instance, if your schema is in src/sg/gov/tech/<name>/<version>/schema.json then it will be available from https://domain/sg/gov/tech/<name>/<version>.
   • Always use 1.0 version for new schemata.

2. Make sure the $id of your schema is the URL from which the schema will be available at.

3. Add tests for your schema.

4. Generate Typescript types:

   • Update scripts/post-install.js and call the generate function by providing the following named arguments:
     • path to indicate where your schema is located. Do not provide the src folder.
     • rootTypeName to specify the name of the default exported object.
   • Run npm run postinstall to generate the types.
   • Update src/index.ts to export the generated types. In order to prevent name collision, use the import * notation to import all the types related to your new schema under a specific name. Then re-export that name.

Feel free to refer to previously created schemata for help.

---

Including Open Attestation schema requirements into existing schema

1. In the same folder as your schema.json, create a json file labelled <name>-open-attestation.json with the following attributes:

   {
     "$id": "...",
     "$schema": "http://json-schema.org/draft-07/schema#",
     "type": "object",
     "allOf": [
       {
         "$ref": "https://schema.openattestation.com/2.0/schema.json"
       },
       {
         "$ref": "..."
       }
     ]
   }

   In the example above:

   • "$id" field is the URL from which the schema will be available at.

   • "$ref" field is a reference to the URL where your existing schema is published. The first "$ref" field refers to the URL where the Open Attestation schema is at.

2. Add tests for your schema.

If you are uncertain of the structure of an Open Attestation document, you can refer to this and append your existing sample document with the required fields.