Difference between EMV tags and ISO 8583 Data Elements

Question

Just wanted to know what the difference between EMV tags and data elements is

For example EMV books specify PAN to be contained in 5A tag however ISO 8583 mentions PAN to be present in DE2 element

Does that mean that these Data Elements are nothing but a collection of these emv specified tags ?

For example DE2 contains the 5A tag?

Answer 1

Both are specifications. ISO8583 deals with the request response messages between different institutions, as per ISO. Each payment schema( eg. Visa, MasterCard, .. ) have their own implementation of ISO8583 which is to be followed when sending/receiving messages to/from them.

EMV is a consortium of payment schemes, and it has specification as to how chip and terminal should communicate with each other, 3D secure, QR code specifications etc. So mostly dealing the acquirer side.