I was recently listed as an author on some papers that my PI submitted to the ASNE Technology, Systems, and Ships Symposium: see here. It says that the papers submitted to the event will be published as Symposia Proceedings which are now listed on their website here. Should these papers be listed as conference papers or do symposia proceedings papers have their own classification? Also, are symposia proceedings seen as lower quality than conference papers? These papers primarily cover the fields of machine learning and computer vision if that makes any difference.