Real Time Information Director User Documentation

Technical Overview of the Real Time Information Director
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Queries and Subscriptions
The Director provides two ways of retrieving data from the Data Store: queries and
subscriptions.
Queries
A client queries the data store by sending a query document to the Director servlet. Both
the query document and its response are in XML and are defined by Director metadata.
The following figure represents the query interface in the context of an Electronic Health
Record (EHR) solution. A user at a web-based eHealth portal sends a query, which the
portal transmits as an XML message to the Director servlet. The Director gathers the
requested data and returns it, as a query response in XML, to the portal, which formats it
for presentation to the user.
NonStop WLS
Real Time
Information
Director EJB
Content Metadata
Director
Servlet
XML via HTTP
eHealth Portal
EHR Data Store
Document
Handlers
Figure 3. Query Interface