Well not the datalink itself, but the information flow is. Again, the datalink assumes that all nodes have some sort of "god eye" and can see all AG targets around, SAMs, ships whatever, regardless they are emitting or not. Just put an JF-17 close to shut down SAM sites and boom, their locations are instantaneously given away through the DL. Realistic behavior would be that each node transmit the target they are attacking, that is, the 'SPI', because it's the only AG contact that is accurately geo-referenced by the attack system at a given time
Oh you are really, really wrong. I recommend you to read the STANAG 5516 to begin with if you want to get closer to the knowledge that my daily work requires :)