Difference between Omniture h23 and h26 code

Question

I am upgrading my Web Analytics Omniture reporting from h23 to h26 code base.

I have two questions: 1) What is the difference between Omniture h23 and h26? 2) I see that a new variable "fid" is firing when I upgraded to h26? What is that variable and what is it's purpose?

Please guide.

Answer 1

The Release Notes are the place to go for this information https://microsite.omniture.com/t2/help/en_US/sc/appmeasurement/release/index.html#JavaScript_H_code_Legacy

C.