It is created by
the CA on the basis of a configuration file. The configuration file may be created by
the system administrator and sent to the CA as a message from the graphical user
interface (GUI) agent or may be contained in a message from the DMA that wants
to update one or more tokens. Each completed token is time stamped and priority
stamped and send back to the CA. Upon completion of its work the (or in the case
of an error) WA sends an appropriate message to the CA and self-destructs. A new
WA with the same functionality is created by the CA whenever needed. Note that
to simplify agent management we create instances of WA for each ???job,??? even
though they may produce tokens describing the same travel resource. For instance,
when one WA is working on finding information about all Westin Hotels in Central
Europe (task assigned by the system administrator), another WA may be asked to
find information about Westin Hotel in Warszawa (job requested by the DMA). It
is the role of the IA to assure that the most current available token is stored in the
repository (see Figure 3).
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