# How do I know a property is an Envelope?

## One way, look at the JSON Schema

The property will be of type `https://api.openteams.com/json-schema/Envelope`, or it will be of type `array` with `$ref` of `https://api.openteams.com/json-schema/Envelope`.

That is:

{
    "type": "https://api.openteams.com/json-schema/Envelope"
}

or

{
    "type": "array"
    , "$ref": "https://api.openteams.com/json-schema/Envelope"
}

or even

{
    "type": "object"
    , "$ref": "https://api.openteams.com/json-schema/Envelope"
}

## How should we scaffold this until we have the ContextLookup done?

function getEnvelopeProperties(response) {
    // for now, fake it! Look at the json-schema uri and return the already known list of envelope properties.
}