For example, you may hear about:
* Show lines: Emphasize conformation and appearance, often bred for dog shows.
* Working lines: Bred for specific tasks like police work, search and rescue, or herding.
* Dual-purpose lines: Aim to balance both conformation and working ability.
It's important to remember that these lines are not separate breeds, but rather variations within the same breed. They all share the same basic characteristics and are all considered German Shepherds.