Value status.handshake as the value for the messageType and an empty objectįor the payload. The app or the EHR MAY initiate a handshake message sequence, using the Launch time, if web messaging is enabled in the other and possibly to discover The purpose of the handshake is to allow apps and EHRs to determine, just after Establish Connection Status: status.* Message Type Handshake That is, an extension array containing FHIR Extension elements MAY be included on any element (including extensions on primitives). Extensions use the same syntax and semantics as in the FHIR Core specification. Users to an origin outside of this set, it SHOULD NOT depend on Web MessagesĮxtensions MAY appear at any point in Request Payload or Response Payload. Web Messages originating from an origin outside this set. After launching an app, the EHR SHOULD NOT process It is assumed that the EHR already knows the set of allowed web origins for eachĪpp, to be used in Web Messaging. The response message payload properties will vary based on the request messageType. The message content as specified by the messageType of the request message. If false or if this property is omitted, the recipient can expect that no additional responses will arrive. If true, indicates that the recipient can expect additional responses to arrive with the same responseToMessageId. The messageId of the received message that this message is in response to. The receiver SHALL send a response message with the following properties: PropertyĪ unique ID for this message generated by the caller. Is provided with the targetOrigin of the app when the app is registered withĬallers SHOULD NOT use "*" for the targetOrigin parameter for security reasons. Sequence in the launch context parameter smart_web_messaging_origin. The targetOrigin of the EHR is provided to the app during the SMART launch The caller SHALL pass this message object to window.postMessage using a The message content as specified by the messageType. The type of this message (e.g., ui.done, scratchpad.update, status.handshake, etc). ( Details below.).Ī unique ID for this message generated by the application. The content of the smart_web_messaging_handle property of the OAuth access token response JSON payload. Request Parametersįor the purposes of SMART Web Messaging, a window.postMessage call from aĬaller SHALL contain a JSON message object with the following properties: Property See the following sections for more details. ResponseToMessageId field, which correlates to the messageId field sent in a Each request message can lead to any number of response Request messages can originate from an app or from the EHR unless Should be readily supportable in browser controls for any EHR capable of Standards-based integration that works across windows, frames and domains, and Interact scratchpad windows#Window.postMessage can pass data between windows by dispatchingĪ window.postMessage-based messaging approach allows flexible, SMART Web Messaging builds on HTML5’s Web Messaging specification, whichĪllows web pages to communicate across domains. The key words “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “MAY”, and “OPTIONAL” in this specification are to be interpreted as described in RFC2119. Refer to the Introduction page for an overview, if needed. Built on the browser’s javascript window.postMessage function, SMART Web Messaging is a simple, native API for health apps embedded within the user’s workflow. SMART Web Messaging allows applications to push unsigned orders, note snippets, risk scores, or UI suggestions directly to the clinician’s EHR session. SMART Web Messaging enables tight UI integration between EHRs and embedded SMART apps via HTML5’s Web Messaging. * OAuth: An open standard for access delegation, commonly used as a way for Internet users to grant websites or applications access to their information on other websites but without giving them the passwords. To the List of Abbreviations section near the end of this IG. NOTE: When adding an abbreviation to this list, also add the same abbreviation EHR FHIR Server Interactions: fhir.http Message TypeĬOMMON TERMS, which will reveal a hover-text definition in the IG when viewed.EHR Scratchpad Interactions: scratchpad.* Message Type. Influence the EHR UI: ui.* Message Type.Establish Connection Status: status.* Message Type.
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