In essence, it is true that the 'International' population is a superset of local populations, in particular, the Western European rule sets. However, there are some caveats that should be observed when using International populations.
The decision on where to use a local population first need not necessarily be based on data volume. It may be the case that several countries have specific watch lists defined. Again, these would be treated first using local populations.
The same theories apply to cross-over areas within other populations.
The UK population has Arabic names in it but the Arabic population has more. Therefore, if the data being analysed comprises mainly Arabic names then the Arabic population should be used first. Similarly, the UK population would treat the string 'ben' as a match for 'Benjamin' whereas the Arabic population would treat this as a noise word.
It is possible to use the Population Override Manager to change the various rules used to treat data. However, as the initial rules themselves are not published, it is recommended that customers contact Informatica Technical Support before doing so.
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