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#!N
#!CNavyBlue
#!N #!Rall270 External Asynchronous Data Sources #!N #!EC #!N #!N Many
applications of visualization tools call for a direct interface to external
data sources, especially ones that generate data to be studied (e.g.
a computational simulation). The execution model of Data Explorer provides the
framework for real-time visualization of data generated asynchronously by such a
process. An external data source is linked into a Data Explorer
network by incorporating a communications module, which receives data from the
external source, often across a socket, and passes the resulting data
object to the module's output. This module (and its descendents) will
only run when the external data source has indicated that new
data are available (see #!Lasynmod,dxall1048 h Asynchronous Modules #!EL in IBM Visualization Data Explorer Programmer's
Reference). #!N #!N Data Explorer also provides a mechanism for direct
manipulation of the executive (e.g., mode, passing data, error handling, etc.)
and the user interface (e.g., window visibility and mode) from an
external application. This allows control of Data Explorer from other software
and peer-to-peer communications (see #!Ldxlink,dxall1141 h DXLink Developer's Toolkit #!EL in IBM Visualization Data Explorer Programmer's
Reference). #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Lall271,dxall272 h Parallelism using Distributed Processing #!EL
#!N #!F-adobe-times-medium-i-normal--18* #!N
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