[avahi] avahi-core and what functionality it provides

[Jim Hodapp]

I need DNS-SD functionality on an embedded device that I'm making. I  
noticed that avahi-core is recommended for this application type and  
not avahi-client. What is the real difference between the two? Is  
there an example service publish/browse application using avahi-core  
instead of avahi-client?

What doesn't avahi-core allow me to do?

Does avahi-core require the avahi-daemon to be running? Or can I just  
make API calls via avahi-core without avahi-daemon running and does  
this allow me to publish a service? How about browsing services  
published on a network, is this possible without avahi-daemon?

Thanks,

Jim