Conference paper published in journal I want to know that's it is written on some conference website that paper will be published at Scopus indexed journal. What that means. Is that paper is considered a conference paper or journal paper after publishing.?
Thanks
I'll give a specific example of a fairly high-ranking robotics journal (no affiliation). Robotics and Automation Letters (RA-L) is a recently-started journal of the Robotics and Automation Society, which is coupled with flagship robotics conferences (IEEE International Conference on Robotics and Automation (ICRA), the IEEE Conference on Automation Science and Engineering (CASE), and the IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)).
Since it has only started in 2016, the impact factor (JCR Impact Factor of 3.6 for 2019) is so-so amongst established journals, but in my opinion really high for a relatively young journal.
Publication in RA-L when coupled with the above three conferences (IROS, ICRA, CASE) works like this:

When submitting to a conference, you have an option to submit the paper for RA-L special issue in addition
RA-L special issue deadline tends to be 2-3 weeks prior the conference submission deadline
Technically, the journal submission could be rejected while the paper is still accepted for conference presentation and publication in conference proceedings (but I haven't heard of that actually happening)
If accepted to RA-L, the paper will still be presented in conference sessions, but will be indexed as part of RA-L special issue associated to that conference.