[APS1 to APS2] How minimal APS2 external application should look like? What are the mandatory elements?

Original Publishing Date:
2020-01-22

Each package should have:

APP-META.xml - filled in manually using specification
APP-LIST.xml - generated automatically during building of the package
schemas folder - containing either manually created schema files or automatically created by apsbuild if aps-php-runtime is used

Generally a package that actually does something has two more directories:

scripts - containing application endpoint scripts, so far should be placed manually on endpoint server
ui - containing html/js code to show views to the user

A more advanced package would have these directories as well:

images - used to store application icon and screenshots
i18n - contains localization files (more on localization)
doc - contains built-in documentation such as provider's guide, deployment guide etc

Generally an application should have at least two services:

Main service installed in Provider Control Panel (implementing http://aps-standard.org/types/core/application/1.0)
Main service installed in Customer Control Panel (it should plug into http://www.aps-standard.org/ui/service)

Check Starter package from our Getting Started guide for a simple package with two services.