DRAFT- InProgress

 Abstract

Commentary:

The  App Directory (AppD) is a service that provides a financial application definition that includes a trusted identifier(s) and associated metadata.  The information registered as part of an application definition supports discovery, launch configuration, intents and context data supporting the use and interoperability of financial applications.  This proposal recommends use of a distributed or detached model to managing application data servicing, where there are (N) AppD services on a network providing information related to a subset of namespace "zones" that align with the financial application identifiers.  This approach encourages independence, scale and responsive provisioning of application definitions. This is modeled from a subset of the public name service "Domain Name System", which has proven reliable and conceptually fit for discovery.

In order to support the discovery of application data stored in a given directory, name space concepts are introduced to both identify the realm of application definitions and AppD service locations that host data.  In simple terms, there has to be a way of discovering the location of the AppD service itself and the associated application definitions that are available from that service.  

This proposal focuses on defining the following key features to support this need:

• Application data discovery through nested namespace approach. (Note: An expanded definition is required outside this proposal)
• AppD service host discovery implementations should support the following requirements;
  1. Discovery through use of DNS SRV record types (RFC2782 ) - **Preferred 
  2. Federated discovery of URI records between AppD services
  3. Statically defined URI records for use within client applications directly

...

getAppData("app.sub.root")  

return 
{
   "guid": "app.sub.root",
   "id":1,
   "name":"app",
   "title":"A really cool app",
   "manifest_url":"https://app.sub1sub.root/app.json",
   "description":"An app that provides really cool financial data",
   "contact_email":"info@app.sub.root",
   "support_email":"support@app.sub.root",
   "signature":"https://prodapp.matchsub.autilla.comroot",
   "publisher":"openfinfoo",
   "icon":"https://app.sub.root/img/1525196540430.jpg",
   "appPage":"/apps/app",
   "images":[
            {
              "url":"https://app.sub.root/img/1525196540315.png"
            }]
}

...