Sailfish contacts file format?

So there is no flat database the People app can import? I didn't mark this as answered because it doesn't answer my question, though thanks. So I've unchecked the checkmark because I don't accept the answer.

What do you mean by "flat" database? .vcf is your contacts file, that holds all your numbers etc. when exported. Just import one file and you're done.

A flat database is, for instance, a comma-delimited database or any other database that isn't a relational database. I'm glad you like vcard files, but I wasn't asking about those. Instead, I was hoping to find what file formats and data structures are supported by the SFOS Settings > Apps > People > "Start import wizard" or "From contact file" configurators.

But vcf file is flat database - it's just a quite simple text file in vCard format. And vCard is standard plain text-based format for contact details. Also, there's no really a reason why would People app support some other/random csv file format when it already supports open standard.

BTW is there a way to export all contacts from my SFOS device into a .vcf file?

EDIT: I recall that I did this via backup, resulting in a fil named "all.vcf", so in way my questions is mood.

I'm not nagging around, I'm asking a question. For instance, in the Trinity Desktop Environment for Linux there is an application called KAddressBook, which does offer a couple of VCard imports, but also some other standards, such as comma-separated values, Eudora, LDIF, and the Operas addressbook format. Because there is a place in SFOS to import from a contacts file, I was seeking to find out what formats were supported by the import function, in that there are several non-VCard addressbook standards. As it happens, I gave up and entered them all manually, so the question, though not answered -- does the import wizard import anything other than VCard? -- is now moot as far as my use is concerned.

Hi, my second part regarding the "nagging" was related to the fact that you received a fair answer, but continue to explain that you mean csv etc. As far as I am aware (though not an expert in Sailfish) it does not work

Honestly I'm glad that even this is available as this stuff was crippled, because in the meantime everyone went crazy with Cal and CardDAV and the online sync with NSA, Google & Co.

I don't wish to draw this out. I'm glad that you saw an answer that satisfied you. I did not, because I did not receive one that answered my question. Had someone said, "The one and only file format supported is VCard," while I would have been sad I would have had the answer. Instead, what was said was "I first exported and then imported to other Sailfish phone as .vcf. Dont know if other formats are supported." I was hoping to learn whether other formats were supported. While "I don't know" is indeed a reply, it is not an answer.