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The Type 1 XAE database is composed of variable values maintained by the Sysplex partners. Each system updates its own variables in ECSA (Extended Common Service Area, a common memory area in that system), and in the Coupling Facility. Each system resolves TYPE 1 variables from its own ECSA, but other systems can access these values using the mirror copy of the variables stored in the Coupling Facility.
Resolving an XAE Type 1 database variable value on a current (default) system is the same as for standard databases. For resolutions of the rule from other systems, the default system name is obtained based on the last value set to the %%$AUTOSYS user-defined system variable.
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