Quick PIC16F874A question

[richard]

a Schmitt Trigger is a type of input circuit and therefore refers to the input buffers for the port , portc on that chip has no open drain pins .
porta.4 however is open drain

[ERMEGM]

But it will work like a TTL I/O, will it not? The digital I/O comment I am questioning, even though it is a Schmitt trigger.