.properties is a filename extension, mainly of files used in the Java language and related technologies. Its purpose is to store the configuration parameters of an application.
It is recommended to use a dedicated editor for creating a property file. Here is a sample .properties file with metadata for exporting:
metadata.properties
pl.Title.0=Przyk\u0142adowa publikacja pl.Creator.0=Jan Kowalski
That file will import the following values in Polish:
- Title: Przykladowa publikacja
- Twórca: Jan Kowalski