There are two kinds of stabilized chlorine, dichlor and trichlor, which both contain CYA. Dichlor is called sodium dichloroisocyanate or dichlorocyanuric acid or sodium dichloro-s-triazinetrione. Dichlor is mostly sold as a granular "shock". Trichlor is called Trichloroisocyanuric acid or trichloro-s-triazinetrione. Trichlor is mostly sold as chlorinating tablets/pucks/sticks. The terms cyanuric, cyanate, and triazinetrione indicate that CYA is present, but usage varies and they may not always appear.
There are three common forms of chlorine that don't contain CYA: bleach (sodium hypochlorite), Cal-hypo (calcium hypochlorite), and Lithium-hypo (lithium hypochlorite).
s-trazinetrione, which is another name for cyanuric acid (CYA). Sometimes stabilized chlorine products are listed as chlorinated cyanurates or chlorinated isocyanurates on labels, and sometimes as chlorinated tricarbimides. Just different names for exactly the same thing!