How will Google email markup support application deeplinking?

Reading through the Google email markup documentation (https://developers.google.com/gmail/markup/overview) I found not information on how it is possible to deeplink into a native application.

Since an email contains LD+JSON and contains the URL, why can't the schema not support a native deep-link into the Android or iOS app?

I would have thought that this is the most obvious use-case where one-click actionable content makes sense.

Solution

If you look at the JSON-LD example for EntryPoint on Schema.org you'll notice that it allows android-app:// and other types of deep links which is a very explicit way of providing deep links for each platform:

<script type="application/ld+json">
{
  "@context": "http://schema.org",
  "@type": "Restaurant",
  "name": "Tartine Bakery",
  "potentialAction": {
    "@type": "ViewAction",
    "target": [
      "http://www.urbanspoon.com/r/6/92204",
      {
        "@type": "EntryPoint",
        "urlTemplate": "http://api.urbanspoon.com/r/6/92204",
        "contentType": "application/json+ld"
      },
      "android-app://com.urbanspoon/http/www.urbanspoon.com/r/6/92204",
      {
        "@type": "EntryPoint",
        "urlTemplate": "urbanspoon://r/6/92204",
        "application": {
          "@type": "SoftwareApplication",
          "@id": "284708449",
          "name": "Urbanspoon iPhone & iPad App",
          "operatingSystem": "iOS"
        }
      },
      {
        "@type": "EntryPoint",
        "urlTemplate": "urbanspoon://r/6/92204",
        "application": {
          "@type": "SoftwareApplication",
          "@id": "5b23b738-bb64-4829-9296-5bcb59bb0d2d",
          "name": "Windows Phone App",
          "operatingSystem": "Windows Phone 8"
        }
      }
    ]
  }
}
</script>

Eventually, once deep linking is baked into all of Google's products, these mappings could be crawled from your webpage and the correct links automatically applied regardless of whether you're view a Highlight in Gmail on Chrome or one of the native mobile apps.