–I_C, –I_{C, pulse} are included in the absolute maximum ratings. What do they mean?

“Including the V Series, –I_C represents the maximum DC forward current which is allowed for the built-in diode, and –I_{c, pulse} represents the maximum pulse forward current which is allowed for the built-in diode.
From X Series on, to be easily recognized as compliant to IEC standards and as diode elements, they have been changed to I_F and I_FRM.”