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What is VistaWeb?
Primarily VistaWeb is an exploration of alternatives. It explores an alternative
technology to Remote Data Views (RDV) or
WebTop. For a comparison of these three
technologies, click here.
It explores an alternative UI
to Windows programs or Swing GUI applications. And it explores alternative
ways to deliver graphics information such as ECG or
DICOM images. That it may
result in a useful application in itself is simply a happy by-product.
How Does It Work?
VistaWeb uses Medical Domain Objects (MDO) as its
data abstraction layer, and it is MDO that handles all the
VistA connectivity.
VistaWeb uses two XML files to configure its site
information. The first one
determines what sites to allow the user to choose for logging in and patient
selection. The second determines from which sites data will be acquired. In
the case of VistaWeb, these files are identical and include all VHA sites, but
other applications using MDO might configure in any other way. The first file,
for example, may contain only the sites from a particular VISN, while the second
is the complete list of VHA sites. This would allow users to select only VISN
sites for logging in and patient selection, but the data would come from all
sites. Of course a user can only log in at a site at which he/she has an account.
The actual access and verify codes are used for this. VistaWeb then tries to set
the OR CPRS GUI CHART context. If unsuccessful, the application proceeds no
further. This behavior duplicates that of CPRS.
At this point, the user is an
authorized CPRS user at
the local site. Since VistaWeb has an SQL Server database, it would now be
possible to do further authorization, for example to determine if the user is
an ISO and therefore allowed to see the ISO log for his/her site, or if the
user is allowed to perform remote site patient lookups.
The following is the sequence of events:
Where to from Here?
Click here to see the VistaWeb wish list.
VISN 11 Stats
Click here to see
statistics on current VISN 11 version of VistaWeb.