I have to create the master data in my new app. That's it, Countries, Cities, Genders, Languages, etc.
Where do I have to create this kind of data? In an external database? And how can I get the data from the app?: CDT, REcordType, etc?
Thanks!
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Unless this data is available via API's, you would need to create a datasource - probably via Records. You can then create the objects that write, update, read and delete the data.
The external database you would initially be the Appian OOB MariaDB use unless your IT team has another database used.
For reference ...
https://docs.appian.com/suite/help/25.1/data-fabric.html
https://docs.appian.com/suite/help/25.1/Using_the_Records_Tab.html