My paper has been accepted to a conference, which does not have any proceedings.
Will it be okay if I submit it to another conference (any ACL conference) which has conference proceedings? The rules of ACL conference has been given as
Papers that have appeared at a conference with published proceedings constitute previously published work.
Papers that overlap other papers that have appeared at a conference with published proceedings must contain significant new results. Authors must include on the title page a list of any previous papers that the current paper overlaps or extends, and must identify the significant new results contained in the new submission. The program co-chairs have the final decision about what constitutes significant new results.
Papers that have appeared at a workshop do not constitute previously published work, as long as the paper submitted to ACL is an extension of the workshop paper. Extensions might include new results, more in-depth analysis, evaluation that was not part of the workshop paper, or further experiments. Authors must include on the title page a list of any previous workshop papers that the current paper extends, and must identify how the current submission extends the previous workshop papers. The program co-chairs have the final decision about whether the ACL submission represents an extension of the workshop papers.
Ritika - it depends what you mean by 'count' - and to whom. Formally i.e. if citation is a measure of publication and required impact and/or if an institution regards a publication as something that is formally ranked Q1, Q2 etc - one could argue that it doesn't count. However, on a CV, it might count for say job applications - where the institution values networking, early promotion of research findings etc. I have seen senior academics profiles whereby they have a list of non-proceedings conference attendence and speaking that is much longer than any other form of 'publication' output.
It depends on how your school treats such conference presentations.
I have sometimes uploaded PPT sides or even a paper based on a non-proceedings presentation to ResearchGate. This gives an online location the citations can refer to. But every school may be different in how it values such a presentation (or in some places the rules are set by the national government agency overseeing higher education).
If an article has been accepted in conference and you have not presented but you have acceptance letter you can mention in your CV article accepted in conference. For example, my article has been accepted in Harvard University conference, I received acceptance letter. Unfortunately, I could not presented the paper. I have mentioned in my CV conference name, university, date, venue.
If an article has been presented in conference, but not been published in 'conference proceeding' the paper will not be counted as published. Presenter may mention in CV paper has been presented in conference.